new toolchain

Makefile

@@ -10,8 +10,8 @@ SIZE = $(TOOLCHAIN)/bin/arm-elf-size
 OBJCOPY = $(TOOLCHAIN)/bin/arm-elf-objcopy
 OBJDUMP = $(TOOLCHAIN)/bin/arm-elf-objdump
 
-INCDIRS = include $(TOOLCHAIN)/lib/gcc/arm-elf/4.1.1/include $(TOOLCHAIN)/arm-elf/include
-LIBDIRS = $(TOOLCHAIN)/arm-elf/lib $(TOOLCHAIN)/lib/gcc/arm-elf/4.1.1
+INCDIRS = include $(TOOLCHAIN)/lib/gcc/arm-elf/4.3.3/include $(TOOLCHAIN)/arm-elf/include
+LIBDIRS = $(TOOLCHAIN)/arm-elf/lib $(TOOLCHAIN)/lib/gcc/arm-elf/4.3.3
 
 # ------
 
@@ -73,6 +73,7 @@ openocd:
 	$(shell $(OPENOCD) -f scripts/openocd.cfg)
 
 install: all
-	./scripts/download.sh
+#	./scripts/download.sh
+	$(TOOLCHAIN)/dfu-util -i 0 -D $(BUILD)/$(TARGET).elf.bin
 
 -include $(shell find $(BUILD) -name *.d 2> /dev/null)

at91_init0.s

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - stack/bss/data init                                            *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -16,13 +18,10 @@
  *   Free Software Foundation, Inc.,                                       *
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
-	.equ AIC_IVR,		(256)
-	.equ AIC_FVR,		(260)
-	.equ AIC_EOICR,		(304)
 	.equ AT91C_BASE_AIC,	(0xFFFFF000)
 
 	.equ IRQ_Stack_Size,	(3 * 8 * 4)
-	.equ FIQ_Stack_Size,	(3 * 8 * 4)
+	.equ FIQ_Stack_Size,	(0 * 8 * 4)
 	.equ ABT_Stack_Size,	192
 
 	.equ ARM_MODE_FIQ,	0x11
@@ -46,15 +45,19 @@ rsvdvec:	ldr     pc, [pc, #24]		/* 0x14 reserved  */
 irqvec:		ldr     pc, [pc, #24]		/* 0x18 IRQ */
 fiqvec:		ldr     pc, [pc, #24]		/* 0x1c FIQ */
 
+	.extern ABT_Handler
+	.extern IRQ_Handler
+	.extern FIQ_Handler
+
 	/* 0x80000000 will result in Prefetch Abort */
 	.word InitReset
 	.word 0x80000000
 	.word 0x80000000
-	.word ABT_Handler_Entry
-	.word ABT_Handler_Entry
+	.word ABT_Handler
+	.word ABT_Handler
 	.word 0x80000000
-	.word IRQ_Handler_Entry
-	.word FIQ_Handler_Entry
+	.word IRQ_Handler
+	.word FIQ_Handler
 
 	.endfunc
 
@@ -74,7 +77,7 @@ InitReset:
 		mov	sp, r0
 		sub	r0, r0, #FIQ_Stack_Size
 
-		/* store AIC Base in ARM_MODE_FIQ:r8 for faster access */
+		/* store AIC Base in r8_fiq for faster access */
 		ldr	r8, =AT91C_BASE_AIC
 
 		/* Setup IRQ Mode Stack */
@@ -120,122 +123,3 @@ LoopZI:		cmp	r1, r2
 		/* exit dummy for newlib */
 exit:		b	.
 	.endfunc
-
-	.global ABT_Handler_Entry
-	.func   ABT_Handler_Entry
-ABT_Handler_Entry:
-		/* disable interrupts (F_BIT not set on entry) */
-		msr	CPSR_c, #ARM_MODE_ABT | I_BIT | F_BIT
-
-		/* store all registers */
-		stmfd	sp!, { r0-r12 }
-
-		/* saved cpsr (from aborted mode) */
-		mrs	r0, SPSR
-
-		/* address of abort (pc) */
-		mov	r3, lr
-
-		/* enter previous mode and get lr(r14), sp(r13) */
-		/* TODO: interrupts might be enabled? */
-		/* TODO: thumb mode enabled? */
-		msr	CPSR_c, r0
-		mov	r1, sp
-		mov	r2, lr
-
-		/* return to abort mode */
-		msr	CPSR_c, #ARM_MODE_ABT | I_BIT | F_BIT
-
-		/* store remaining registers (r1-r3 == r13-r15) */
-		stmfd	sp!, { r1-r3 }
-		mov	r1, sp
-
-		/* execute C Handler (cpsr, registers) */
-		ldr	r5, =at91_abt_handler
-		mov	lr, pc
-		bx	r5
-		b	.
-	.endfunc
-
-        .global FIQ_Handler_Entry
-        .func   FIQ_Handler_Entry
-FIQ_Handler_Entry:
-		/* Save r0 to ARM_MODE_FIQ:r9 */
-		mov	r9, r0
-
-		/* get FIQ Vector from AIC and thus clear FIQ */
-		ldr	r0, [r8, #AIC_FVR]
-
-		/* Switch to ARM_MODE_SVC and save registers there */
-		msr	CPSR_c, #ARM_MODE_SVC | I_BIT | F_BIT
-		stmfd	sp!, { r1-r3, r12, lr }
-
-		/* execute FIQ in SVC_MODE */
-		mov	r14, pc
-		bx	r0
-
-		/* restore registers and switch back to ARM_MODE_FIQ */
-		ldmia	sp!, { r1-r3, r12, lr }
-		msr	CPSR_c, #ARM_MODE_FIQ | I_BIT | F_BIT
-
-		/* restore the ARM_MODE_SVC:r0 */
-		mov	r0, r9
-
-		/* restore PC using the LR_fiq directly */
-		subs	pc, lr, #4
-	.endfunc
-
-        .global IRQ_Handler_Entry
-        .func   IRQ_Handler_Entry
-IRQ_Handler_Entry:
-		/* Manage Exception Entry */
-		/* Adjust and save LR_irq in IRQ stack */
-		sub	lr, lr, #4
-		stmfd	sp!, { lr }
-
-		/* Save SPSR need to be saved for nested interrupt */
-		mrs	r14, SPSR
-		stmfd	sp!, { r14 }
-
-		/* Save and r0 in IRQ stack */
-		stmfd	sp!, { r0 }
-
-		/* Write in the IVR to support Protect Mode */
-		/* No effect in Normal Mode */
-		/* De-assert the NIRQ and clear the source in Protect Mode */
-		ldr	r14, =AT91C_BASE_AIC
-		ldr	r0, [r14, #AIC_IVR]
-		str	r14, [r14, #AIC_IVR]
-
-		/* Enable Interrupt and Switch in Supervisor Mode */
-		msr	CPSR_c, #ARM_MODE_SVC
-
-		/* Save scratch/used registers and LR in User Stack */
-		stmfd	sp!, { r1-r3, r12, r14 }
-
-		/* Branch to the routine pointed by the AIC_IVR */
-		mov	r14, pc
-		bx	r0
-
-		/* Restore scratch/used registers and LR from User Stack */
-		ldmia	sp!, { r1-r3, r12, r14 }
-
-		/* Disable Interrupt and switch back in IRQ mode */
-		msr	CPSR_c, #ARM_MODE_IRQ | I_BIT
-
-		/* Mark the End of Interrupt on the AIC */
-		ldr	r14, =AT91C_BASE_AIC
-		str	r14, [r14, #AIC_EOICR]
-
-		/* Restore SPSR_irq and r0 from IRQ stack */
-		ldmia	sp!, { r0 }
-
-		/* Restore SPSR_irq and r0 from IRQ stack */
-		ldmia	sp!, { r14 }
-		msr	SPSR_cxsf, r14
-
-		/* Restore adjusted  LR_irq from IRQ stack directly in the PC */
-		ldmia	sp!, { pc }^
-
-	.endfunc
-	.end

at91_init1.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - PLL Init, IRQ/FIQ Vectors                                      *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -31,33 +33,33 @@ void at91_init1(void)
 {
 	/* disable watchdog */
 	*AT91C_WDTC_WDMR = AT91C_WDTC_WDDIS;
-	
+
 	/* enable user reset */
 	*AT91C_RSTC_RMR = (AT91C_RSTC_KEY & 0xA5 << 24) | AT91C_RSTC_URSTEN;
 
 	/* Set Flash Waitstates */
 	*AT91C_MC_FMR = AT91C_MC_FWS_1FWS;
-	
-	/* 
+
+	/*
 	 * Enable main oscillator (MAINCK)
 	 * startup time: 8*6/32768 -> 1.46ms
 	 */
 	AT91S_PMC *pmc = AT91C_BASE_PMC;
-	pmc->PMC_MOR = (AT91C_CKGR_OSCOUNT & (6<<8)) | 
+	pmc->PMC_MOR = (AT91C_CKGR_OSCOUNT & (6<<8)) |
 			AT91C_CKGR_MOSCEN;
 	while (!(pmc->PMC_SR & AT91C_PMC_MOSCS));
 
-	/* 
+	/*
 	 * PLLCK = 18.432MHz / 24 * 125 = 96MHz -> div:24, mul:124
 	 * startup time: 32/32768 -> 976us
-	 */ 
-	pmc->PMC_PLLR = (AT91C_CKGR_DIV & 24) | 
-			(AT91C_CKGR_MUL & (124<<16)) | 
+	 */
+	pmc->PMC_PLLR = (AT91C_CKGR_DIV & 24) |
+			(AT91C_CKGR_MUL & (124<<16)) |
 			(AT91C_CKGR_PLLCOUNT & (32<<8)) ;
 	while (!(pmc->PMC_SR & AT91C_PMC_LOCK));
 
 	/* MCK = PLLCK / 2 = 48MHz */
-	pmc->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | 
+	pmc->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK |
 			AT91C_PMC_PRES_CLK_2;
 	while (!(pmc->PMC_SR & AT91C_PMC_MCKRDY));
 
@@ -79,3 +81,96 @@ void at91_init1(void)
 	}
 	aic->AIC_SPU = (uint32_t)empty_isr;
 }
+
+__attribute__((naked)) void IRQ_Handler(void)
+{
+	asm volatile (
+		".equ ARM_MODE_IRQ,	0x12		\n\t"
+		".equ ARM_MODE_SVC,	0x13		\n\t"
+		".equ I_BIT,		0x80		\n\t"
+
+		".equ AIC_IVR,		(256)		\n\t"
+		".equ AIC_EOICR,	(304)		\n\t"
+		".equ AT91C_BASE_AIC,	(0xFFFFF000)	\n\t"
+
+		/* Adjust and save lr_irq on IRQ stack */
+		"sub	lr, lr, #4				\n\t"
+		"stmfd	sp!, { lr }				\n\t"
+
+		/* Save SPSR (for nested interrupts) */
+		"mrs	r14, SPSR				\n\t"
+		"stmfd	sp!, { r14 }				\n\t"
+
+		/* Save r0 on IRQ stack */
+		"stmfd	sp!, { r0 }				\n\t"
+
+		/* Write in the IVR to support Protect Mode */
+		"ldr	r14, =AT91C_BASE_AIC			\n\t"
+		"ldr	r0, [r14, #AIC_IVR]			\n\t"
+		"str	r14, [r14, #AIC_IVR]			\n\t"
+
+		/* Enable Interrupt and switch to SVC mode */
+		"msr	CPSR_c, #ARM_MODE_SVC			\n\t"
+
+		/* Save scratch/used registers and lr on SVC Stack */
+		"stmfd	sp!, { r1-r3, r12, r14 }		\n\t"
+
+		/* Branch to the routine pointed by the AIC_IVR */
+		"mov	r14, pc					\n\t"
+		"bx	r0					\n\t"
+
+		/* Restore scratch/used registers and lr from SVC Stack */
+		"ldmia	sp!, { r1-r3, r12, r14 }		\n\t"
+
+		/* Disable Interrupt and switch back to IRQ mode */
+		"msr	CPSR_c, #ARM_MODE_IRQ | I_BIT		\n\t"
+
+		/* Mark the End of Interrupt on the AIC */
+		"ldr	r14, =AT91C_BASE_AIC			\n\t"
+		"str	r14, [r14, #AIC_EOICR]			\n\t"
+
+		/* Restore SPSR_irq and r0 from IRQ stack */
+		"ldmia	sp!, { r0 }				\n\t"
+		"ldmia	sp!, { r14 }				\n\t"
+		"msr	SPSR_cxsf, r14				\n\t"
+
+		/* Restore adjusted lr_irq from IRQ stack */
+		"ldmia	sp!, { pc }^				\n\t"
+	);
+}
+
+__attribute__((naked)) void FIQ_Handler(void)
+{
+	asm volatile (
+		".equ ARM_MODE_FIQ,	0x11		\n\t"
+		".equ ARM_MODE_SVC,	0x13		\n\t"
+		".equ I_BIT,		0x80		\n\t"
+		".equ F_BIT,		0x40		\n\t"
+
+		".equ AIC_FVR,		(260)		\n\t"
+
+		/* Save r0 to r9_fiq */
+		"mov	r9, r0					\n\t"
+
+		/* get FIQ Vector from AIC and thus clear FIQ */
+		"ldr	r0, [r8, #AIC_FVR]			\n\t"
+
+		/* Switch to SVC and save registers there */
+		"msr	CPSR_c, #ARM_MODE_SVC | I_BIT | F_BIT	\n\t"
+		"stmfd	sp!, { r1-r3, r12, lr }			\n\t"
+
+		/* execute FIQ in SVC_MODE */
+		"mov	r14, pc					\n\t"
+		"bx	r0					\n\t"
+
+		/* restore registers and switch back to FIQ */
+		"ldmia	sp!, { r1-r3, r12, lr }			\n\t"
+		"msr	CPSR_c, #ARM_MODE_FIQ | I_BIT | F_BIT	\n\t"
+
+		/* restore the r0 from r9_fiq */
+		"mov	r0, r9					\n\t"
+
+		/* restore PC using the lr_fiq directly */
+		"subs	pc, lr, #4				\n\t"
+	);
+}

include/at91_adc.h

@@ -0,0 +1,32 @@
+#ifndef AT91_ADC_H_
+#define AT91_ADC_H_
+
+#include <stdint.h>
+
+#define ADC_GYRO_NICK	0
+#define ADC_GYRO_ROLL	1
+#define ADC_GYRO_GIER	2
+
+#define ADC_ACC_NICK	3
+#define ADC_ACC_ROLL	4
+#define ADC_ACC_GIER	5
+
+#define ADC_VOLTAGE	6
+
+// TODO: not all flags are public
+#define ADC_COMPLETE		0x0001
+#define ADC_CAL_GYRO		0x0100
+#define ADC_CAL_GYRO_COMPLETE	0x0200
+#define ADC_CAL_ACC		0x1000
+#define ADC_CAL_ACC_COMPLETE	0x2000
+#define ADC_CAL_ACC_LOAD	0x4000
+
+void adc_trigger(void);
+void adc_get_results(int16_t *adc_result);
+
+void adc_calibrate(uint32_t mode);
+void adc_drift_adjust(int16_t nick, int16_t roll, int16_t yaw);
+
+void at91_adc_init(void);
+
+#endif /* AT91_ADC_H_ */

include/at91_dbgu.h

@@ -1,12 +1,10 @@
 #ifndef AT91_DBGU_H_
 #define AT91_DBGU_H_
 
-#include <stddef.h>
-
 void at91_dbgu_init(void);
 
 void at91_dbgu_putc(char c);
 void at91_dbgu_puts(const char *p);
 int at91_dbgu_write(void *base, const char *buf, size_t len);
 
-#endif /*AT91_DBGU_H_*/
+#endif /* AT91_DBGU_H_ */

include/at91_pitc.h

@@ -17,6 +17,7 @@ struct pitc_timer {
 };
 
 void pitc_schedule_timer(struct pitc_timer *timer);
+void pitc_remove_timer(struct pitc_timer *timer);
 
 uint32_t pitc_get_ticks(void);
 void at91_pitc_init(void);

include/at91_tc1.h

@@ -5,13 +5,18 @@
 
 #define RC_CAL_START	0
 #define RC_CAL_END	1
+#define RC_CAL_LOAD	2
+#define RC_CAL_SAVE	3
 
 struct rc_values {
 	int16_t chan[MAX_CHANNELS];
 };
 
 uint32_t rcontrol_getvalues(struct rc_values *rc);
+uint32_t rcontrol_getswitches(struct rc_values *rc);
+
 void rcontrol_calibrate(uint32_t mode);
+void rcontrol_print_cal(void);
 
 void at91_tc1_init(void);
 

include/at91_tests.h

@@ -3,7 +3,4 @@
 
 void at91_rttc_test_init(void);
 
-void at91_adc_test_init(void);
-void at91_adc_printresults(void);
-
 #endif /*AT91_TESTS_H_*/

include/at91_twi.h

@@ -1,16 +1,16 @@
 #ifndef AT91TWI_H_
 #define AT91TWI_H_
 
-#include <list.h>
+#include <stdint.h>
 
 /* TWI slave addresses */
 #define TWI_ADDR_BL1		0x21
 #define TWI_ADDR_BL2		0x22
 #define TWI_ADDR_BL3		0x23
 #define TWI_ADDR_BL4		0x24
-#define TWI_ADDR_EEPROM		0x40
+#define TWI_ADDR_EEPROM		0x50
 
-/* TWIBOOT commands */ 
+/* TWIBOOT commands */
 #define CMD_WAIT		0x00
 #define CMD_GET_INFO		0x10
 #define CMD_GET_SIGNATURE	0x11
@@ -25,31 +25,72 @@
 //#define CMD_GET_INFO		0x10
 #define CMD_SET_PWM		0x21
 #define CMD_GET_STATUS		0x22
-//#define CMD_SET_PARAM		0x23
-//#define CMD_GET_PARAM		0x24
+#define CMD_SET_PARAM		0x23
+#define CMD_GET_PARAM		0x24
 #define CMD_BOOT_LOADER		0x2F
 
+struct blmc_status {
+	uint8_t pwm_ist;
+	uint8_t pwm_soll;
 
-struct blmc_cmd {
+	uint16_t rpm;
+	uint16_t current;
+	uint16_t voltage;
+} __attribute__ ((packed));
+
+struct blmc_param {
+	uint16_t spinup_ticks;
+
+	uint8_t spinup_tick;
+	uint8_t spinup_step;
+
+	uint8_t spinup_wait;
+	uint8_t spinup_pwm;
+
+	uint8_t pwm_min;
+	uint8_t pwm_max;
+
+	uint16_t current_limit;
+	uint16_t current_max;
+
+	uint16_t voltage_min;
+
+	uint16_t crc16;
+} __attribute__ ((packed));
+
+
+#define EE_PARAMETER_SET_START		0x0000
+
+/* remote control calibration data */
+#define EE_RC_CAL_DATA			(EE_PARAMETER_SET_START)
+#define EE_RC_CAL_DATA_SIZE		48
+
+/* ACC calibration data */
+#define EE_ACC_CAL_DATA			(EE_RC_CAL_DATA + EE_RC_CAL_DATA_SIZE)
+#define EE_ACC_CAL_DATA_SIZE		6
+
+#define EE_PARAMETER_SET_END		(EE_ACC_CAL_DATA + EE_ACC_CAL_DATA_SIZE)
+
+struct twi_cmd {
 	uint32_t cmd;		/* cmd byte(s) */
 	uint8_t mode;		/* read/write, cmdlen (1-3 bytes) */
-	uint8_t size;		/* data size */
+	uint16_t size;		/* data size */
 	uint8_t *data;		/* read/write data */
 };
 
 /* same bits as TWI_MMR[8..15] */
-#define BLMC_CMD_READ		0x10
-#define BLMC_CMD_WRITE		0x00
-#define BLMC_CMD_0_ARG		0x01
-#define BLMC_CMD_1_ARG		0x02
-#define BLMC_CMD_2_ARG		0x03
+#define TWI_MODE_READ		0x10
+#define TWI_MODE_WRITE		0x00
+#define TWI_MODE_0_ARG		0x01
+#define TWI_MODE_1_ARG		0x02
+#define TWI_MODE_2_ARG		0x03
 
 uint32_t twi_read_eeprom(uint32_t addr, uint8_t *buf, uint32_t size);
 uint32_t twi_write_eeprom(uint32_t addr, uint8_t *buf, uint32_t size);
 
 uint32_t twi_setpwm(uint8_t *values);
 
-uint32_t twi_cmd(uint8_t addr, struct blmc_cmd *cmd);
+uint32_t twi_cmd(uint8_t addr, struct twi_cmd *cmd);
 
 void at91_twi_init(void);
 void at91_twi_test(void);

include/at91_udp.h

@@ -1,6 +1,20 @@
 #ifndef AT91_UDP_H_
 #define AT91_UDP_H_
 
+#include <stdint.h>
+
+void ep_transfer_send(uint32_t ep,
+			char *data,
+			uint32_t length,
+			void (*complete_cb)(void));
+
+void ep_transfer_receive(uint32_t ep,
+			char *data,
+			uint32_t length,
+			void (*complete_cb)(void));
+
+void ep_send_stall(uint32_t ep);
+
 void at91_udp_init(void);
 
 #endif /*AT91_UDP_H_*/

include/board.h

@@ -12,16 +12,16 @@
 #define BAUD_TO_DIV(BAUD) (MCK / (16 * BAUD))
 
 /* LED PIOs */
-#define LED_ORANGE	AT91C_PIO_PA17
-#define LED_GREEN	AT91C_PIO_PA18
+#define LED_ORANGE	AT91C_PIO_PA24
+#define LED_GREEN	AT91C_PIO_PA23
 
 /* Taster PIOs */
-#define TAST1		AT91C_PIO_PA19
-#define TAST2		AT91C_PIO_PA20
+#define TAST1		AT91C_PIO_PA0
+#define TAST2		AT91C_PIO_PA1
 
 /* USB PIOs */
-#define UDP_VBUS_MON	AT91C_PIO_PA24
-#define UDP_PULLUP	AT91C_PIO_PA25
+#define UDP_VBUS_MON	AT91C_PIO_PA8
+#define UDP_PULLUP	AT91C_PIO_PA16
 
 /* ATMEL IDs */
 #define USB_VENDOR_ID	0x03EB
@@ -40,4 +40,6 @@
 #define MIN(a,b) ((a) < (b) ? (a) : (b))
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 
+#define LIMIT(val, min, max) (((val) < (min)) ? (min) : (((val) > (max)) ? (max) : (val)))
+
 #endif /*BOARD_H_*/

include/pidctrl.h

@@ -0,0 +1,23 @@
+#ifndef _PIDCTRL_H_
+#define _PIDCTRL_H_
+
+#include <stdint.h>
+
+struct pid_data {
+	int32_t kp;
+
+	int32_t ki;
+	int32_t err_sum;
+	int32_t err_sum_max;
+	int32_t err_sum_min;
+
+	int32_t kd;
+	int32_t err_old;
+
+	int32_t out_max;
+	int32_t out_min;
+};
+
+int32_t pid_ctrl(struct pid_data *pid, int32_t error);
+
+#endif /* _PIDCTRL_H_ */

include/tdc_proto.h

@@ -0,0 +1,103 @@
+#ifndef TDCPROTO_H_
+#define TDCPROTO_H_
+
+#include <stdint.h>
+
+/*
+ * 0: this is a request (host -> board)
+ * 1: this is a reply (board -> host)
+ */
+#define TDC_DIR		0x80
+#define TDC_REPLY	TDC_DIR
+
+/*
+ * TDC_DIR = 0: destination address
+ * TDC_DIR = 1: source address
+ */
+#define TDC_ADDRMASK	0x70
+#define TDC_ADDR0	0x00		// host (dynamic!, sends to interface of last hello)
+#define TDC_ADDR1	0x10		// flightcontrol
+#define TDC_ADDR2	0x20		// missioncontrol
+#define TDC_ADDR3	0x30		// videocontrol
+#define TDC_ADDR4	0x40
+#define TDC_ADDR5	0x50
+#define TDC_ADDR6	0x60
+#define TDC_ADDR7	0x70
+
+#define TDC_OPCODEMASK	0x0F
+#define TDC_HELLO	0x00		// sets the path/interface to the host, reply is a info string
+#define TDC_GETVARS	0x01		// request variable names, many replies
+#define TDC_GETVALUE	0x02		// get one value, one reply
+#define TDC_SETVALUE	0x03		// set one value, no reply
+#define TDC_REQVALUES	0x04		// registers a periodic update, timed replies
+#define TDC_TERMINAL	0x05		// stdout data
+
+#define TDC_USERDATA	0x0F		// user-defined data e.g. between boards
+
+struct tdc_pkt_header {
+	uint8_t cmd;			// TDC_*
+	uint8_t size;			// size including this header
+} __attribute__ ((packed));
+
+struct tdc_hello_reply {
+	uint8_t cmd;
+	uint8_t size;
+	char name[32];			// name of device, version string
+} __attribute__ ((packed));
+
+struct tdc_getvars_reply {
+	uint8_t cmd;
+	uint8_t size;
+	uint8_t id;			// variable ID (max 256 vars / board)
+	uint32_t flags;			// variable parameters (type, size, ro/rw)
+	uint8_t name_len;		// size of variable name
+	char name[0];			// variable name, excluding '\0'
+} __attribute__ ((packed));
+
+struct tdc_getvalue_request {
+	uint8_t cmd;
+	uint8_t size;
+	uint8_t id;			// variable ID (max 256 vars / board)
+} __attribute__ ((packed));
+
+struct tdc_getvalue_reply {
+	uint8_t cmd;
+	uint8_t size;
+	uint8_t id;			// variable ID (max 256 vars / board)
+	uint8_t data[0];		// variable data 1-8 bytes
+} __attribute__ ((packed));
+
+struct tdc_setvalue_request {
+	uint8_t cmd;
+	uint8_t size;
+	uint8_t id;			// variable ID (max 256 vars / board)
+	uint8_t data[0];		// variable data 1-8 bytes
+} __attribute__ ((packed));
+
+struct tdc_reqvalues_request {
+	uint8_t cmd;
+	uint8_t size;
+	uint16_t interval;		// interval in ms
+	uint32_t varmap[8];		// bitmap of variables (32 * 8 = 256)
+} __attribute__ ((packed));
+
+struct tdc_reqvalues_reply {
+	uint8_t cmd;
+	uint8_t size;
+	uint32_t timestamp;		// internal jiffie count
+	uint8_t cnt;			// number of variables
+} __attribute__ ((packed));
+
+#define TDC_SIZEMASK	0x000F
+
+#define TDC_TYPEMASK	0x00F0
+#define TDC_UNSIGNED	0x0000
+#define TDC_SIGNED	0x0010
+#define TDC_FP		0x0020
+#define TDC_FIXED	0x0040
+
+#define TDC_READONLY	0x0100
+
+#define TDC_GUI_GRAPH	0x8000
+
+#endif /* TDCPROTO_H_ */

include/telemetrie.h

@@ -1,108 +1,19 @@
 #ifndef TELEMETRIE_H_
 #define TELEMETRIE_H_
 
-/*
- * 0: this is a request (host -> board)
- * 1: this is a reply (board -> host)
- */
-#define TDC_DIR		0x80
-#define TDC_REPLY	TDC_DIR
-
-/*
- * TDC_DIR = 0: destination address
- * TDC_DIR = 1: source address
- */
-#define TDC_ADDRMASK	0x70
-#define TDC_ADDR0	0x00		// host (dynamic!, sends to interface of last hello)
-#define TDC_ADDR1	0x10		// flightcontrol
-#define TDC_ADDR2	0x20		// missioncontrol
-#define TDC_ADDR3	0x30		// videocontrol
-#define TDC_ADDR4	0x40
-#define TDC_ADDR5	0x50
-#define TDC_ADDR6	0x60
-#define TDC_ADDR7	0x70
-
-#define TDC_OPCODEMASK	0x0F
-#define TDC_HELLO	0x00		// sets the path/interface to the host, reply is a info string
-#define TDC_GETVARS	0x01		// request variable names, many replies
-#define TDC_GETVALUE	0x02		// get one value, one reply
-#define TDC_SETVALUE	0x03		// set one value, no reply
-#define TDC_REQVALUES	0x04		// registers a periodic update, timed replies
-#define TDC_TERMINAL	0x05		// stdout data
-
-#define TDC_USERDATA	0x0F		// user-defined data e.g. between boards
-
-struct tdc_pkt_header {
-	uint8_t cmd;			// TDC_*
-	uint8_t size;			// bytes after size
-} __attribute__ ((packed));
-
-struct tdc_hello_reply {
-	uint8_t cmd;
-	uint8_t size;
-	char name[32];			// name of device, version string
-} __attribute__ ((packed));
-
-struct tdc_getvars_reply {
-	uint8_t cmd;
-	uint8_t size;
-	uint8_t id;			// variable ID (max 256 vars / board)
-	uint32_t flags;			// variable parameters (type, size, ro/rw)
-	char name[0];		// variable name, excluding '\0'
-} __attribute__ ((packed));
-
-struct tdc_getvalue_request {
-	uint8_t cmd;
-	uint8_t size;
-	uint8_t id;			// variable ID (max 256 vars / board)
-} __attribute__ ((packed));
-
-struct tdc_getvalue_reply {
-	uint8_t cmd;
-	uint8_t size;
-	uint8_t id;			// variable ID (max 256 vars / board)
-	uint8_t data[0];		// variable data 1-8 bytes
-} __attribute__ ((packed));
-
-struct tdc_setvalue_request {
-	uint8_t cmd;
-	uint8_t size;
-	uint8_t id;			// variable ID (max 256 vars / board)
-	uint8_t data[0];		// variable data 1-8 bytes
-} __attribute__ ((packed));
-
-struct tdc_reqvalues_request {
-	uint8_t cmd;
-	uint8_t size;
-	uint16_t interval;		// interval in ms
-	uint32_t varmap[8];		// bitmap of variables (32 * 8 = 256)
-} __attribute__ ((packed));
-
-struct tdc_reqvalues_reply {
-	uint8_t cmd;
-	uint8_t size;
-	uint32_t timestamp;		// internal jiffie count
-	uint8_t cnt;			// number of variables
-} __attribute__ ((packed));
-
-
+#include "tdc_proto.h"
 
 struct comm_device {
 	struct fifo *rxfifo;
 	struct fifo *txfifo;
+	void (*trigger_tx)(void);
 };
 
 void tdc_register_device(uint32_t addr, struct comm_device *device);
-
 int32_t tdc_transmit(uint32_t addr, struct tdc_pkt_header *head);
 
-void tdc_receive(struct comm_device *device);
-
-
-
-
-
-
+void tdc_check(void);
+void tdc_init(void);
 
 struct tdc_value {
 	void *data;
@@ -110,26 +21,45 @@ struct tdc_value {
 	uint32_t flags;
 };
 
-#define TDC_SIZEMASK	0x0F
-#define TDC_UNSIGNED	0x00
-#define TDC_SIGNED	0x10
-#define TDC_FP		0x20
+#if 1
 
-#define TDC_VALUE(var, desc, type, flags) \
-	type * tdc_check_##var(void) { return (&var); } \
+#define TDC_VALUE(name, var, desc, type, flags) \
+	type * tdc_check_##name(void) { return (&var); } \
 	static struct tdc_value __attribute__((used, section(".tdc_value"))) \
-	tdc_value_##var = { &var, desc, sizeof(type) | flags }; \
-	tdc_value_##var = tdc_value_##var;
+	tdc_value_##name = { &var, desc, sizeof(type) | flags }; \
+	tdc_value_##name = tdc_value_##name;
 
-#define TDC_UINT8(var, desc)	TDC_VALUE(var, desc, uint8_t, TDC_UNSIGNED)
-#define TDC_UINT16(var, desc)	TDC_VALUE(var, desc, uint16_t, TDC_UNSIGNED)
-#define TDC_UINT32(var, desc)	TDC_VALUE(var, desc, uint32_t, TDC_UNSIGNED)
-#define TDC_UINT64(var, desc)	TDC_VALUE(var, desc, uint64_t, TDC_UNSIGNED)
-#define TDC_INT8(var, desc)	TDC_VALUE(var, desc, int8_t, TDC_SIGNED)
-#define TDC_INT16(var, desc)	TDC_VALUE(var, desc, int16_t, TDC_SIGNED)
-#define TDC_INT32(var, desc)	TDC_VALUE(var, desc, int32_t, TDC_SIGNED)
-#define TDC_INT64(var, desc)	TDC_VALUE(var, desc, int64_t, TDC_SIGNED)
-#define TDC_FLOAT(var, desc)	TDC_VALUE(var, desc, float, TDC_FP)
-#define TDC_DOUBLE(var, desc)	TDC_VALUE(var, desc, double, TDC_FP)
+#define TDC_PTR(name, ptr, desc, type, flags) \
+	static struct tdc_value __attribute__((used, section(".tdc_value"))) \
+	tdc_value_##name = { ptr, desc, sizeof(type) | flags }; \
+
+#else
+
+#define TDC_VALUE(name, var, desc, type, flags)
+#define TDC_PTR(name, ptr, desc, type, flags);
+
+#endif
+
+#define TDC_UINT8(var, desc)	TDC_VALUE(var, var, desc, uint8_t, TDC_UNSIGNED)
+#define TDC_UINT16(var, desc)	TDC_VALUE(var, var, desc, uint16_t, TDC_UNSIGNED)
+#define TDC_UINT32(var, desc)	TDC_VALUE(var, var, desc, uint32_t, TDC_UNSIGNED)
+#define TDC_UINT64(var, desc)	TDC_VALUE(var, var, desc, uint64_t, TDC_UNSIGNED)
+#define TDC_INT8(var, desc)	TDC_VALUE(var, var, desc, int8_t, TDC_SIGNED)
+#define TDC_INT16(var, desc)	TDC_VALUE(var, var, desc, int16_t, TDC_SIGNED)
+#define TDC_INT32(var, desc)	TDC_VALUE(var, var, desc, int32_t, TDC_SIGNED)
+#define TDC_INT64(var, desc)	TDC_VALUE(var, var, desc, int64_t, TDC_SIGNED)
+#define TDC_FLOAT(var, desc)	TDC_VALUE(var, var, desc, float, TDC_FP)
+#define TDC_DOUBLE(var, desc)	TDC_VALUE(var, var, desc, double, TDC_FP)
+
+#define TDC_UINT8_RO(var, desc)		TDC_VALUE(var, var, desc, uint8_t, TDC_UNSIGNED | TDC_READONLY)
+#define TDC_UINT16_RO(var, desc)	TDC_VALUE(var, var, desc, uint16_t, TDC_UNSIGNED | TDC_READONLY)
+#define TDC_UINT32_RO(var, desc)	TDC_VALUE(var, var, desc, uint32_t, TDC_UNSIGNED | TDC_READONLY)
+#define TDC_UINT64_RO(var, desc)	TDC_VALUE(var, var, desc, uint64_t, TDC_UNSIGNED | TDC_READONLY)
+#define TDC_INT8_RO(var, desc)		TDC_VALUE(var, var, desc, int8_t, TDC_SIGNED | TDC_READONLY)
+#define TDC_INT16_RO(var, desc)		TDC_VALUE(var, var, desc, int16_t, TDC_SIGNED | TDC_READONLY)
+#define TDC_INT32_RO(var, desc)		TDC_VALUE(var, var, desc, int32_t, TDC_SIGNED | TDC_READONLY)
+#define TDC_INT64_RO(var, desc)		TDC_VALUE(var, var, desc, int64_t, TDC_SIGNED | TDC_READONLY)
+#define TDC_FLOAT_RO(var, desc)		TDC_VALUE(var, var, desc, float, TDC_FP | TDC_READONLY)
+#define TDC_DOUBLE_RO(var, desc)	TDC_VALUE(var, var, desc, double, TDC_FP | TDC_READONLY)
 
 #endif /*TELEMETRIE_H_*/

main.c

@@ -1,95 +1,106 @@
-/***************************************************************************
- *   Copyright (C) 01/2008 by Olaf Rempel                                  *
- *   razzor@kopf-tisch.de                                                  *
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; version 2 of the License                *
- *                                                                         *
- *   This program is distributed in the hope that it will be useful,       *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU General Public License for more details.                          *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
- ***************************************************************************/
-#include "AT91SAM7S256.h"
-#include "at91_sysc.h"
-#include "at91_dbgu.h"
-#include "at91_pitc.h"
-#include "at91_tests.h"
-#include "at91_udp.h"
-#include "at91_pio.h"
-#include "at91_twi.h"
-
-#include "at91_tc1.h"
-#include "memalloc.h"
-
-#include "board.h"
-#include <stdio.h>
-#include <string.h>
-
-static uint32_t pitc_test(struct pitc_timer *timer)
-{
-	static uint32_t i;
-	*AT91C_PIOA_SODR = i;
-	i = i ^ LED_GREEN;
-	*AT91C_PIOA_CODR = i;
-/*
-	struct rc_values rc;
-	uint32_t count = rcontrol_getvalues(&rc);
-
-	printf("%ld channels: ", count);
-	uint32_t j;
-	for (j = 0; j < count; j++)
-		printf("%+5d ", rc.chan[j]);
-
-	printf("\r");
-*/
-	return PITC_RESTART_TIMER;
-}
-
-static struct pitc_timer pitc_test_timer = {
-	.interval = 10,
-	.func = &pitc_test,
-};
-
-int main(void)
-{
-	/* LED outputs */
-	*AT91C_PIOA_PER = LED_GREEN | LED_ORANGE;
-	*AT91C_PIOA_OER = LED_GREEN | LED_ORANGE;
-
-	/* needed for dbgu */
-	at91_sysc_init();
-
-	at91_dbgu_init();
-	at91_dbgu_puts("==========================================================\n\rGood morning Dave\n\r");
-
-	/* triggers pinchange-isrs */
-	at91_pio_init();
-
-	/* timer */
-	at91_pitc_init();
-	at91_rttc_test_init();
-	at91_tc1_init();
-
-	/* adc, need timer */
-	at91_adc_test_init();
-
-	/* twi */
-	at91_twi_init();
-	at91_twi_test();
-
-	/* usb */
-	at91_udp_init();
-
-	printf("static alloc: %5ld bytes\n\r", static_alloc_used());
-
-	pitc_schedule_timer(&pitc_test_timer);
-
-	while (1);
-}
+/***************************************************************************
+ *   sam7fc - main loop                                                    *
+ *                                                                         *
+ *   Copyright (C) 01/2008 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; version 2 of the License                *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <stdio.h>
+#include <string.h>
+
+#include "AT91SAM7S256.h"
+#include "board.h"
+
+#include "at91_sysc.h"
+#include "at91_dbgu.h"
+#include "at91_pitc.h"
+#include "at91_adc.h"
+#include "at91_tests.h"
+#include "at91_udp.h"
+#include "at91_pio.h"
+#include "at91_twi.h"
+
+#include "at91_tc1.h"
+#include "memalloc.h"
+#include "telemetrie.h"
+
+extern void base_ctrl(void);
+
+volatile static uint32_t run_ctrl;
+
+static uint32_t base_ctrl_trigger(struct pitc_timer *timer)
+{
+	/* trigger adc, after ~15us () result should be ready */
+	adc_trigger();
+
+	run_ctrl = 1;
+
+	return PITC_RESTART_TIMER;
+}
+
+static struct pitc_timer base_timer = {
+	.interval = 2,
+	.func = &base_ctrl_trigger,
+};
+
+int main(void)
+{
+	/* LED outputs */
+	*AT91C_PIOA_PER = LED_GREEN | LED_ORANGE;
+	*AT91C_PIOA_OER = LED_GREEN | LED_ORANGE;
+
+	/* needed for dbgu */
+	at91_sysc_init();
+
+	at91_dbgu_init();
+	at91_dbgu_puts("==========================================================\n\rGood morning Dave\n\r");
+
+	/* triggers pinchange-isrs */
+	at91_pio_init();
+
+	/* timer */
+	at91_pitc_init();
+	at91_rttc_test_init();
+
+	/* twi */
+	at91_twi_init();
+	at91_twi_test();
+
+	/* remote control, needs twi */
+	at91_tc1_init();
+
+	/* usb */
+	at91_udp_init();
+
+	/* adc, need timer, twi */
+	at91_adc_init();
+
+	pitc_schedule_timer(&base_timer);
+
+	tdc_init();
+
+	printf("static alloc: %5ld bytes\n\r", static_alloc_used());
+
+	while (1) {
+		if (run_ctrl) {
+			// TODO: racy?
+			run_ctrl = 0;
+
+			base_ctrl();
+		}
+		tdc_check();
+	}
+}

src/at91_adc.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - ADC routines / calibration                                     *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -18,38 +20,181 @@
  ***************************************************************************/
 #include <stdint.h>
 #include <stdio.h>
-
 #include "AT91SAM7S256.h"
 #include "board.h"
+#include "at91_adc.h"
 #include "at91_pitc.h"
+#include "at91_twi.h"
+#include "telemetrie.h"
 
-static uint16_t adc_result[4];
+static uint32_t adc_status;
+
+static uint16_t adc_tmp[7];
+static uint16_t adc_offset[6];
+
+TDC_PTR(adc_offset0, &adc_offset[ADC_GYRO_NICK], "XADC_GYRO_NICK (offset)", int16_t, TDC_UNSIGNED);
+TDC_PTR(adc_offset1, &adc_offset[ADC_GYRO_ROLL], "XADC_GYRO_ROLL (offset)", int16_t, TDC_UNSIGNED);
+TDC_PTR(adc_offset2, &adc_offset[ADC_GYRO_GIER], "XADC_GYRO_GIER (offset)", int16_t, TDC_UNSIGNED);
+TDC_PTR(adc_offset3, &adc_offset[ADC_ACC_NICK], "XADC_ACC_NICK (offset)", int16_t, TDC_UNSIGNED);
+TDC_PTR(adc_offset4, &adc_offset[ADC_ACC_ROLL], "XADC_ACC_ROLL (offset)", int16_t, TDC_UNSIGNED);
+TDC_PTR(adc_offset5, &adc_offset[ADC_ACC_GIER], "XADC_ACC_GIER (offset)", int16_t, TDC_UNSIGNED);
+
+#define ADC_CAL_COUNT_MAX 1024
+
+static uint32_t adc_cal_count;
+static uint32_t adc_cal_data[3];
+
+/* check eeprom parameter size (3x uint16_t) */
+#if ((3 * 2) != EE_ACC_CAL_DATA_SIZE)
+#error "invalid EE_ACC_CAL_DATA_SIZE"
+#endif
 
 static void at91_adc_isr(void)
 {
 	AT91S_PDC *pdc = AT91C_BASE_PDC_ADC;
-	pdc->PDC_RPR = (uint32_t) &adc_result;
-	pdc->PDC_RCR = ARRAY_SIZE(adc_result);
+	pdc->PDC_RPR = (uint32_t) &adc_tmp;
+	pdc->PDC_RCR = ARRAY_SIZE(adc_tmp);
 	pdc->PDC_PTCR = AT91C_PDC_RXTEN;
 
 	/* clear interrupts */
-	AT91S_ADC *adc = AT91C_BASE_ADC;
-	uint32_t status = adc->ADC_SR;
-	status = status;
+	uint32_t dummy = *AT91C_ADC_SR;
+	dummy = dummy;
+
+	if (!(adc_status & (ADC_CAL_GYRO | ADC_CAL_ACC)))
+		return;
+
+	if (adc_status & ADC_CAL_GYRO) {
+		adc_cal_data[0] += adc_tmp[ADC_GYRO_NICK];
+		adc_cal_data[1] += adc_tmp[ADC_GYRO_ROLL];
+		adc_cal_data[2] += adc_tmp[ADC_GYRO_GIER];
+
+	} else {
+		adc_cal_data[0] += adc_tmp[ADC_ACC_NICK];
+		adc_cal_data[1] += adc_tmp[ADC_ACC_ROLL];
+		adc_cal_data[2] += adc_tmp[ADC_ACC_GIER];
+	}
+
+	adc_cal_count++;
 }
 
-static uint32_t adc_trigger(struct pitc_timer *timer)
+static uint32_t adc_calibrate_cb(struct pitc_timer *timer)
 {
-	*AT91C_ADC_CR = AT91C_ADC_START;
-	return PITC_RESTART_TIMER;
+	if (adc_cal_count < ADC_CAL_COUNT_MAX) {
+		/* trigger next cycle */
+		*AT91C_ADC_CR = AT91C_ADC_START;
+		return PITC_RESTART_TIMER;
+
+	} else {
+		if (adc_status & ADC_CAL_GYRO) {
+			adc_offset[ADC_GYRO_NICK] = adc_cal_data[0] / ADC_CAL_COUNT_MAX;
+			adc_offset[ADC_GYRO_ROLL] = adc_cal_data[1] / ADC_CAL_COUNT_MAX;
+			adc_offset[ADC_GYRO_GIER] = adc_cal_data[2] / ADC_CAL_COUNT_MAX;
+
+			adc_calibrate(ADC_CAL_GYRO_COMPLETE);
+
+		} else {
+			adc_offset[ADC_ACC_NICK] = adc_cal_data[0] / ADC_CAL_COUNT_MAX;
+			adc_offset[ADC_ACC_ROLL] = adc_cal_data[1] / ADC_CAL_COUNT_MAX;
+			adc_offset[ADC_ACC_GIER] = adc_cal_data[2] / ADC_CAL_COUNT_MAX;
+
+			adc_calibrate(ADC_CAL_ACC_COMPLETE);
+		}
+		return PITC_REMOVE_TIMER;
+	}
 }
 
-static struct pitc_timer adc_timer = {
-	.interval = 100,
-	.func = &adc_trigger,
+static struct pitc_timer adc_cal_timer = {
+	.interval = 1,
+	.func = &adc_calibrate_cb,
 };
 
-void at91_adc_test_init(void)
+void adc_trigger(void)
+{
+	// TODO: err in retvalue?
+	if (!(adc_status & (ADC_CAL_GYRO | ADC_CAL_ACC)))
+		*AT91C_ADC_CR = AT91C_ADC_START;
+}
+
+void adc_get_results(int16_t *adc_result)
+{
+	// TODO: err in retvalue?
+	if (!(adc_status & (ADC_CAL_GYRO | ADC_CAL_ACC))) {
+		uint32_t i;
+		for (i = ADC_GYRO_NICK; i <= ADC_GYRO_GIER; i++)
+			adc_result[i] = (int16_t)(adc_offset[i]) - (int16_t)(adc_tmp[i]);
+
+		for (i = ADC_ACC_NICK; i <= ADC_ACC_GIER; i++)
+			adc_result[i] = (int16_t)(adc_tmp[i]) - (int16_t)(adc_offset[i]);
+
+		/* (adc / 1024) * 3.3V * (11k / 1k) * 100 */
+		adc_result[ADC_VOLTAGE] = ((uint32_t)adc_tmp[ADC_VOLTAGE] * 3630) / 1024;
+	}
+}
+
+void adc_calibrate(uint32_t mode)
+{
+	/* disable interrupt */
+	*AT91C_ADC_IDR = AT91C_ADC_ENDRX;
+
+	switch (mode) {
+	case ADC_CAL_GYRO_COMPLETE:
+		adc_status &= ~ADC_CAL_GYRO;
+		break;
+
+	case ADC_CAL_ACC_COMPLETE:
+		twi_write_eeprom(EE_ACC_CAL_DATA,
+				(uint8_t *)&(adc_offset[ADC_ACC_NICK]),
+				EE_ACC_CAL_DATA_SIZE);
+
+		adc_status &= ~ADC_CAL_ACC;
+		break;
+
+	case ADC_CAL_ACC_LOAD:
+		twi_read_eeprom(EE_ACC_CAL_DATA,
+				(uint8_t *)&(adc_offset[ADC_ACC_NICK]),
+				EE_ACC_CAL_DATA_SIZE);
+		break;
+
+	case ADC_CAL_GYRO:
+	case ADC_CAL_ACC:
+		/* calibration in progress.. */
+		if (adc_status & (ADC_CAL_GYRO | ADC_CAL_ACC))
+			break;
+
+		adc_status |= mode;
+		adc_cal_count = 0;
+		adc_cal_data[0] = 0;
+		adc_cal_data[1] = 0;
+		adc_cal_data[2] = 0;
+		pitc_schedule_timer(&adc_cal_timer);
+
+		/* trigger next cycle */
+		*AT91C_ADC_CR = AT91C_ADC_START;
+		break;
+	}
+
+	if (!(adc_status & (ADC_CAL_GYRO | ADC_CAL_ACC))) {
+		printf("ADC offsets: %d/%d/%d %d/%d/%d\n\r",
+			adc_offset[ADC_GYRO_NICK],
+			adc_offset[ADC_GYRO_ROLL],
+			adc_offset[ADC_GYRO_GIER],
+			adc_offset[ADC_ACC_NICK],
+			adc_offset[ADC_ACC_ROLL],
+			adc_offset[ADC_ACC_GIER]);
+	}
+
+	/* enable interrupt */
+	*AT91C_ADC_IER = AT91C_ADC_ENDRX;
+}
+
+void adc_drift_adjust(int16_t nick, int16_t roll, int16_t yaw)
+{
+	adc_offset[ADC_GYRO_NICK] += nick;
+	adc_offset[ADC_GYRO_ROLL] += roll;
+	adc_offset[ADC_GYRO_GIER] += yaw;
+}
+
+void at91_adc_init(void)
 {
 	/* enable ADC clock */
 	*AT91C_PMC_PCER = (1 << AT91C_ID_ADC);
@@ -74,12 +219,12 @@ void at91_adc_test_init(void)
 
 	/* setup PDC */
 	AT91S_PDC *pdc = AT91C_BASE_PDC_ADC;
-	pdc->PDC_RPR = (uint32_t) &adc_result;
-	pdc->PDC_RCR = ARRAY_SIZE(adc_result);
+	pdc->PDC_RPR = (uint32_t) &adc_tmp;
+	pdc->PDC_RCR = ARRAY_SIZE(adc_tmp);
 	pdc->PDC_PTCR = AT91C_PDC_RXTEN;
 
-	/* enable 4 channels, PDC Interrupt */
-	adc->ADC_CHER = 0xF0;
+	/* enable 7 channels (0-1-2-4-5-6-7), PDC Interrupt */
+	adc->ADC_CHER = 0xF7;
 	adc->ADC_IER = AT91C_ADC_ENDRX;
 
 	/* low priority, level triggered, own vector */
@@ -88,5 +233,6 @@ void at91_adc_test_init(void)
 	aic->AIC_SVR[AT91C_ID_ADC] = (uint32_t)at91_adc_isr;
 	aic->AIC_IECR = (1<<AT91C_ID_ADC);
 
-	pitc_schedule_timer(&adc_timer);
+	adc_calibrate(ADC_CAL_ACC_LOAD);
+	adc_calibrate(ADC_CAL_GYRO);
 }

src/at91_dbgu.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - Debug Unit RS232 Port                                        *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -24,27 +26,18 @@
 #include "at91_sysc.h"
 #include "fifo.h"
 
+#define DBGU_BAUDRATE	115200
+#define DBGU_FIFO_SIZE	1024
+#define DBGU_TX_CHUNKS	16
+
 static struct fifo *txfifo;
 
 static void dbgu_isr(uint32_t status)
 {
 	/* only enabled interrupts */
 	status &= *AT91C_DBGU_IMR;
-/*
-	if (status & AT91C_US_TXEMPTY) {
-		static char c;
-		if (c == '\n') {
-			*AT91C_DBGU_THR = '\r';
-			c = 0;
-
-		} else if (fifo_getbyte(&txfifo, &c) == 1)
-			*AT91C_DBGU_THR = c;
-		else
-			*AT91C_DBGU_IDR = AT91C_US_TXEMPTY;
-	}
-*/
 	if (status & AT91C_US_TXBUFE)
-		if (fifo_txpdc(txfifo, AT91C_BASE_PDC_DBGU, 16) == 0)
+		if (fifo_txpdc(txfifo, AT91C_BASE_PDC_DBGU, DBGU_TX_CHUNKS) == 0)
 			*AT91C_DBGU_IDR = AT91C_US_TXBUFE;
 }
 
@@ -55,11 +48,11 @@ void at91_dbgu_init(void)
 
 	/* enable Debug Port with 115200 Baud (+0.16%) */
 	AT91S_DBGU *dbgu = AT91C_BASE_DBGU;
-	dbgu->DBGU_BRGR = BAUD_TO_DIV(115200);
+	dbgu->DBGU_BRGR = BAUD_TO_DIV(DBGU_BAUDRATE);
 	dbgu->DBGU_MR = AT91C_US_PAR_NONE | AT91C_US_CHMODE_NORMAL;
 	dbgu->DBGU_CR = AT91C_US_RXEN | AT91C_US_TXEN | AT91C_US_RSTSTA;
 
-	txfifo = fifo_alloc(1024);
+	txfifo = fifo_alloc(DBGU_FIFO_SIZE);
 
 	/* enable TX PDC */
 	dbgu->DBGU_PTCR = AT91C_PDC_TXTEN;
@@ -70,21 +63,18 @@ void at91_dbgu_init(void)
 void at91_dbgu_putc(char c)
 {
 	fifo_putbyte(txfifo, c);
-//	*AT91C_DBGU_IER = AT91C_US_TXEMPTY;
 	*AT91C_DBGU_IER = AT91C_US_TXBUFE;
 }
 
 void at91_dbgu_puts(const char *p)
 {
 	fifo_put(txfifo, (char *)p, strlen(p));
-//	*AT91C_DBGU_IER = AT91C_US_TXEMPTY;
 	*AT91C_DBGU_IER = AT91C_US_TXBUFE;
 }
 
 int at91_dbgu_write(void *base, const char *buf, size_t len)
 {
 	int retval = fifo_put(txfifo, (char *)buf, len);
-//	*AT91C_DBGU_IER = AT91C_US_TXEMPTY;
 	*AT91C_DBGU_IER = AT91C_US_TXBUFE;
 	return retval;
 }

src/at91_exceptions.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - Abort Handler with Register/Stackdump                        *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -39,7 +41,7 @@ static void dbgu_puts(const char *p)
 static void dbgu_hexvar(const char *name, uint32_t var)
 {
 	dbgu_puts(name);
-	
+
 	char buf[11];
 	buf[0] = '0';
 	buf[1] = 'x';
@@ -47,7 +49,7 @@ static void dbgu_hexvar(const char *name, uint32_t var)
 	for (i = 9; i > 1; i--) {
 		buf[i] = (var & 0x0F);
 		buf[i] += (buf[i] < 0xa) ? '0' : ('a' - 0x0a);
-		var >>= 4;		
+		var >>= 4;
 	}
 	buf[10] = '\0';
 	dbgu_puts(buf);
@@ -59,8 +61,8 @@ ARM7TDMI 32bit Undefined Address Instruction Fetch Abort
 --- Registerdump (cpsr:0xa0000013 - SVC):
  r0:0x00000002  r1:0x0000000c  r2:0x00200038  r3:0x80000000
  r4:0x0020fffc  r5:0x00101788  r6:0x00000180  r7:0x41000000
- r8:0x00008400  r9:0x00100004 r10:0x03000294  fp:0x0020fe84
-r12:0x0020fe10  sp:0x0020fe70  lr:0x00102174  pc:0x80000004
+ r8:0x00008400  r9:0x00100004  sl:0x03000294  fp:0x0020fe84
+ ip:0x0020fe10  sp:0x0020fe70  lr:0x00102174  pc:0x80000004
 --- Stackdump:
 0x0020fe70: 0x0020fe7c 0x00101648 0x001015a8 0x0020feaf
 0x0020fe80: 0x0020fec0 0x0020fe90 0x00101780 0x00101620
@@ -96,17 +98,17 @@ void at91_abt_handler(uint32_t cpsr, uint32_t *registers)
 		dbgu_puts("32bit ");
 		break;
 	}
-		
+
 	if (asr & AT91C_MC_UNDADD)
 		dbgu_puts("Undefined Address ");
 	else if (asr & AT91C_MC_MISADD)
 		dbgu_puts("Misaliged Address ");
-	
+
 	switch (asr & AT91C_MC_ABTTYP) {
 	case AT91C_MC_ABTTYP_DATAR:
 		dbgu_puts("Data Read ");
 		break;
-		
+
 	case AT91C_MC_ABTTYP_DATAW:
 		dbgu_puts("Data Write ");
 		break;
@@ -115,7 +117,7 @@ void at91_abt_handler(uint32_t cpsr, uint32_t *registers)
 		dbgu_puts("Prefetch ");
 		break;
 	}
-	
+
 	dbgu_hexvar("Abort\n(ASR:", asr);
 	dbgu_hexvar(" AASR:", *AT91C_MC_AASR);
 	dbgu_puts(")\n");
@@ -142,9 +144,9 @@ void at91_abt_handler(uint32_t cpsr, uint32_t *registers)
 	dbgu_hexvar("  r7:", registers[10]);
 	dbgu_hexvar("\n r8:", registers[11]);
 	dbgu_hexvar("  r9:", registers[12]);
-	dbgu_hexvar(" r10:", registers[13]);
+	dbgu_hexvar("  sl:", registers[13]);
 	dbgu_hexvar("  fp:", registers[14]);
-	dbgu_hexvar("\nr12:", registers[15]);
+	dbgu_hexvar("\n ip:", registers[15]);
 	dbgu_hexvar("  sp:", registers[0]);
 	dbgu_hexvar("  lr:", registers[1]);
 	dbgu_hexvar("  pc:", registers[2]);
@@ -160,3 +162,43 @@ void at91_abt_handler(uint32_t cpsr, uint32_t *registers)
 	}
 	dbgu_putchar('\n');
 }
+
+__attribute__((naked)) void ABT_Handler(void)
+{
+	asm volatile (
+		".equ ARM_MODE_ABT,	0x17		\n\t"
+		".equ I_BIT,		0x80		\n\t"
+		".equ F_BIT,		0x40		\n\t"
+
+		/* disable interrupts (F_BIT not set on entry) */
+		"msr	CPSR_c, #ARM_MODE_ABT | I_BIT | F_BIT	\n\t"
+
+		/* store all registers */
+		"stmfd	sp!, { r0-r12 }				\n\t"
+
+		/* saved cpsr (from aborted mode) */
+		"mrs	r0, SPSR				\n\t"
+
+		/* address of abort (pc) */
+		"mov	r3, lr					\n\t"
+
+		/* enter previous mode and get lr(r14), sp(r13) */
+		"orr	r1, r0, #I_BIT | F_BIT			\n\t"
+		"msr	CPSR_c, r1				\n\t"
+		"mov	r1, sp					\n\t"
+		"mov	r2, lr					\n\t"
+
+		/* return to abort mode */
+		"msr	CPSR_c, #ARM_MODE_ABT | I_BIT | F_BIT	\n\t"
+
+		/* store remaining registers (r1-r3 == r13-r15) */
+		"stmfd	sp!, { r1-r3 }				\n\t"
+		"mov	r1, sp					\n\t"
+
+		/* execute C Handler (cpsr, *registers) */
+		"ldr	r5, =at91_abt_handler			\n\t"
+		"mov	lr, pc					\n\t"
+		"bx	r5					\n\t"
+		"b	.					\n\t"
+	);
+}

src/at91_pio.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - Pinchange Interrupt Handler                                  *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -55,7 +57,7 @@ void at91_pio_init(void)
 	/* enable pinchange interrupts */
 	struct pio_pinchange_isr *isr;
 	for (isr = &_pio_isr_table; isr < &_pio_isr_table_end; isr++)
-		*AT91C_PIOA_IER = isr->mask;	
+		*AT91C_PIOA_IER = isr->mask;
 
 	/* dummy read to clear interrupts */
 	uint32_t dummy = *AT91C_PIOA_ISR;

src/at91_pitc.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - Periodic Timer Handling                                      *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -21,13 +23,15 @@
 #include "at91_sysc.h"
 #include "board.h"
 
+#define PITC_HZ		1000
+
 /* PIV is 20bit -> min. 3Hz @48MHz MCK */
 #define HZ_TO_PIV(HZ) (MCK / (16 * HZ))
 
 static LIST_HEAD(timer_list);
 volatile static uint32_t pitc_ticks;
 
-void pitc_schedule_timer(struct pitc_timer *timer)
+static void _pitc_schedule_timer(struct pitc_timer *timer)
 {
 	timer->nextrun = timer->interval + pitc_ticks;
 
@@ -39,6 +43,26 @@ void pitc_schedule_timer(struct pitc_timer *timer)
 	list_add_tail(&timer->list, &search->list);
 }
 
+void pitc_schedule_timer(struct pitc_timer *timer)
+{
+	/* disable PITC interrupt */
+	*AT91C_PITC_PIMR &= ~AT91C_PITC_PITIEN;
+
+	/* check it timer is already running */
+	if (timer->nextrun == 0 && timer->interval > 0)
+		_pitc_schedule_timer(timer);
+
+	// TODO: if timer is running, interval changes are delayed
+
+	/* enable PITC interrupt */
+	*AT91C_PITC_PIMR |= AT91C_PITC_PITIEN;
+}
+
+void pitc_remove_timer(struct pitc_timer *timer)
+{
+	timer->interval = 0;
+}
+
 static void pitc_isr(uint32_t status)
 {
 	/* get Ticks and clear interrupt */
@@ -54,13 +78,14 @@ static void pitc_isr(uint32_t status)
 		list_del(&search->list);
 
 		/* exec handler */
-		if (search->func(search) == PITC_REMOVE_TIMER) {
+		if ((search->interval == 0) || search->func(search) == PITC_REMOVE_TIMER) {
 			/* one-shot timer, mark as completed */
-			search->nextrun = 0x00;
+			search->nextrun = 0;
 			continue;
 		}
+
 		/* interval timer, reschedule it */
-		pitc_schedule_timer(search);
+		_pitc_schedule_timer(search);
 	}
 }
 
@@ -73,7 +98,7 @@ void at91_pitc_init(void)
 {
 	sysc_register_isr(AT91_SYSIRQ_PIT, &pitc_isr);
 
-	*AT91C_PITC_PIMR = (AT91C_PITC_PIV & HZ_TO_PIV(100)) |
+	*AT91C_PITC_PIMR = (AT91C_PITC_PIV & HZ_TO_PIV(PITC_HZ)) |
 			   AT91C_PITC_PITEN |
 			   AT91C_PITC_PITIEN;
 }

src/at91_rttc_test.c

@@ -1,3 +1,23 @@
+/***************************************************************************
+ *   sam7fc - Real Time Clock Calibration                                  *
+ *                                                                         *
+ *   Copyright (C) 02/2008 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; version 2 of the License                *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
 #include <stdio.h>
 #include "AT91SAM7S256.h"
 #include "at91_sysc.h"
@@ -6,22 +26,16 @@
 static void rtt_isr(uint32_t status)
 {
 	*AT91C_RTTC_RTAR = *AT91C_RTTC_RTVR +1;
-/*
-	static uint32_t i;
-	*AT91C_PIOA_SODR = i;
-	i = i ^ LED_ORANGE;
-	*AT91C_PIOA_CODR = i;
-*/
 }
 
 void at91_rttc_test_init(void)
 {
 	/* calculate SLOWCK from MAINCK and measured MAINF */
 	uint32_t prescaler = MAINCK * 16 / (*AT91C_CKGR_MCFR & AT91C_CKGR_MAINF);
-	
+
 	sysc_register_isr(AT91_SYSIRQ_RTT, &rtt_isr);
 
-	/* 
+	/*
 	 * AT91C_RTTC_RTTINCIEN doesn't work
 	 * use AT91C_RTTC_ALMIEN and increment RTAR in isr
 	 */
@@ -29,6 +43,6 @@ void at91_rttc_test_init(void)
 	*AT91C_RTTC_RTMR = (AT91C_RTTC_RTPRES & prescaler) |
 			   AT91C_RTTC_ALMIEN |
 			   AT91C_RTTC_RTTRST;
-			   
+
 	printf("rttc running at %ld Hz\n\r", prescaler);
 }

src/at91_sysc.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - System Interrupt Dispatcher                                  *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -31,15 +33,15 @@ struct _irq_regs {
 
 /* same IDs as sysc_isrs enum! */
 static const struct _irq_regs irq_regs[] = {
-	/* 
+	/*
 	 * PIT (Periodic Intervall Timer)
 	 * ISR must read AT91C_PITC_PIVR to clear interrupt
 	 * - PITIEN (Periodic Intervall Timer Interrupt Enable)
-	 */ 
+	 */
 	{	AT91C_PITC_PIMR, AT91C_PITC_PITIEN,
 		AT91C_PITC_PISR, AT91C_PITC_PITS
 	},
-	
+
 	/*
 	 * DBGU (Debug Unit)
 	 * TODO: must use AT91C_DBGU_IDR to fault disable interrupt
@@ -58,12 +60,12 @@ static const struct _irq_regs irq_regs[] = {
 				AT91C_US_TXBUFE | AT91C_US_RXBUFF |
 				AT91C_US_COMM_TX | AT91C_US_COMM_RX)
 	},
-	
+
 	/*
 	 * EFC (Embedded Flash Controller / Memory Controller)
 	 */
 	{	AT91C_MC_FMR, (AT91C_MC_FRDY | AT91C_MC_LOCKE | AT91C_MC_PROGE),
-		AT91C_MC_FSR, (AT91C_MC_FRDY | AT91C_MC_LOCKE | AT91C_MC_PROGE)	
+		AT91C_MC_FSR, (AT91C_MC_FRDY | AT91C_MC_LOCKE | AT91C_MC_PROGE)
 	},
 
 	/*
@@ -84,7 +86,7 @@ static const struct _irq_regs irq_regs[] = {
 	{	AT91C_RTTC_RTMR, (AT91C_RTTC_ALMIEN | AT91C_RTTC_RTTINCIEN),
 		AT91C_RTTC_RTSR, (AT91C_RTTC_ALMS | AT91C_RTTC_RTTINC)
 	},
-	
+
 	/*
 	 * RSTC (Reset Controller)
 	 * - AT91C_RSTC_URSTIEN (User Reset Interrupt Enable)
@@ -104,27 +106,27 @@ static const struct _irq_regs irq_regs[] = {
 				AT91C_PMC_PCK1RDY | AT91C_PMC_PCK2RDY),
 		AT91C_PMC_SR, (AT91C_PMC_MOSCS | AT91C_PMC_LOCK |
 				AT91C_PMC_MCKRDY | AT91C_PMC_PCK0RDY |
-				AT91C_PMC_PCK1RDY | AT91C_PMC_PCK2RDY)	
+				AT91C_PMC_PCK1RDY | AT91C_PMC_PCK2RDY)
 	},
-};	
+};
 
 /* check Interrupts from internal hardware */
 static void at91_sysc_isr(void)
 {
 	uint32_t id;
 	for (id = 0; id < AT91_SYSIRQ_COUNT; id++) {
-		
+
 		/* check if interrups are enabled */
 		if (*(irq_regs[id].mask_register) & irq_regs[id].mask) {
 
 			/* check if interrupts are active */
 			uint32_t status = *(irq_regs[id].status_register);
 			if (status & irq_regs[id].status) {
-				
+
 				/* execute handler */
 				if (sysc_isrs[id]) {
 					sysc_isrs[id](status);
-					
+
 				} else {
 					/* disable interrupts */
 					*(irq_regs[id].mask_register) &= ~irq_regs[id].mask;
@@ -138,9 +140,9 @@ void at91_sysc_init(void)
 {
 	/* high priority, level triggered, own vector */
 	AT91S_AIC *aic = AT91C_BASE_AIC;
-	aic->AIC_SMR[AT91C_ID_SYS] = IRQPRIO_SYSC | 
+	aic->AIC_SMR[AT91C_ID_SYS] = IRQPRIO_SYSC |
 				     AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL;
-	
+
 	aic->AIC_SVR[AT91C_ID_SYS] = (uint32_t)at91_sysc_isr;
 	aic->AIC_IECR = (1<<AT91C_ID_SYS);
 }
@@ -149,6 +151,6 @@ void sysc_register_isr(enum syscirqs irq, SYSCISR *isr)
 {
 	if (irq >= AT91_SYSIRQ_COUNT)
 		return;
-	
+
 	sysc_isrs[irq] = isr;
 }

src/at91_tc1.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - RC-PPM Signal decoder                                        *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -22,13 +24,15 @@
 #include "AT91SAM7S256.h"
 #include "board.h"
 #include "at91_tc1.h"
-#include "at91_pio.h"
+#include "at91_twi.h"
 
 /* Hard limits for ISR */
 #define PULSE_MIN	0x0500
 #define PULSE_MAX	0x0D00
 #define PULSE_TIMEOUT	0x0F00
+
 #define PULSE_CENTER	0x08C0
+#define PULSE_SWITCH	0x01F0
 
 /* moving average filters */
 #define PULSE_FILTER_FAST	(1<<2)
@@ -49,6 +53,11 @@ struct channel_data {
 	uint16_t max;		/* maximum value */
 };
 
+/* check eeprom parameter size (uint16_t min/mid/max) */
+#if ((MAX_CHANNELS * 3 * 2) != EE_RC_CAL_DATA_SIZE)
+#error "invalid EE_RC_CAL_DATA_SIZE"
+#endif
+
 static struct channel_data ch_data[MAX_CHANNELS];
 static uint32_t count, valid, cal_in_progress;
 
@@ -123,17 +132,32 @@ uint32_t rcontrol_getvalues(struct rc_values *rc)
 		uint16_t width = (filter) ? ch_data[i].width_slow : ch_data[i].width;
 
 		/* expand the value to +/- VALUE_RANGE */
-		int32_t tmp = (width - ch_data[i].mid) * VALUE_RANGE;
+		int32_t tmp = (uint32_t)(width - ch_data[i].mid) * VALUE_RANGE;
 		tmp = tmp / ((tmp > 0) ? (ch_data[i].max - ch_data[i].mid) : (ch_data[i].mid - ch_data[i].min));
 
+		// TODO: stick mapping
 		/* keep result in range */
-		if (tmp > VALUE_RANGE)
-			tmp = VALUE_RANGE;
+		rc->chan[i] = LIMIT(tmp, -VALUE_RANGE, +VALUE_RANGE);
+	}
+	return cnt;
+}
 
-		if (tmp < -VALUE_RANGE)
-			tmp = -VALUE_RANGE;
+uint32_t rcontrol_getswitches(struct rc_values *rc)
+{
+	if (valid < 5)
+		return 0;
 
-		rc->chan[i] = tmp;
+	uint32_t i;
+	uint32_t cnt = MIN(ROUND_DIV256(count), ARRAY_SIZE(ch_data));
+	for (i = 0; i < cnt; i++) {
+		if (ch_data[i].width > (PULSE_CENTER + PULSE_SWITCH))
+			rc->chan[i] = VALUE_RANGE;
+
+		else if (ch_data[i].width < (PULSE_CENTER - PULSE_SWITCH))
+			rc->chan[i] = -VALUE_RANGE;
+
+		else
+			rc->chan[i] = 0;
 	}
 	return cnt;
 }
@@ -141,6 +165,8 @@ uint32_t rcontrol_getvalues(struct rc_values *rc)
 void rcontrol_calibrate(uint32_t mode)
 {
 	uint32_t i;
+	uint8_t buf[EE_RC_CAL_DATA_SIZE];
+	uint16_t *ptr = (uint16_t *)buf;
 
 	switch (mode) {
 	case RC_CAL_START:
@@ -159,23 +185,42 @@ void rcontrol_calibrate(uint32_t mode)
 			/* treat current position as center */
 			ch_data[i].mid = ch_data[i].width_slow;
 
-			/* if center is near minimum, clamp output to 0..+1024 */
+			/* if center is near minimum, clamp output to 0..+RANGE */
 			if (ch_data[i].mid - ch_data[i].min < PULSE_MID_DIFF)
 				ch_data[i].mid = ch_data[i].min;
 
-			/* if center is near maximum, clamp output to -1024..0 */
+			/* if center is near maximum, clamp output to -RANGE..0 */
 			if (ch_data[i].max - ch_data[i].mid < PULSE_MID_DIFF)
 				ch_data[i].mid = ch_data[i].max;
 		}
 		break;
+
+	case RC_CAL_LOAD:
+		twi_read_eeprom(EE_RC_CAL_DATA, buf, EE_RC_CAL_DATA_SIZE);
+		for (i = 0; i < ARRAY_SIZE(ch_data); i++) {
+			ch_data[i].min = *ptr++;
+			ch_data[i].mid = *ptr++;
+			ch_data[i].max = *ptr++;
+		}
+		break;
+
+	case RC_CAL_SAVE:
+		for (i = 0; i < ARRAY_SIZE(ch_data); i++) {
+			*ptr++ = ch_data[i].min;
+			*ptr++ = ch_data[i].mid;
+			*ptr++ = ch_data[i].max;
+		}
+		twi_write_eeprom(EE_RC_CAL_DATA, buf, EE_RC_CAL_DATA_SIZE);
+		break;
 	}
 }
 
 void rcontrol_print_cal(void)
 {
 	uint32_t i;
+	printf("stick-calibration:\n\r");
 	for (i = 0; i < ARRAY_SIZE(ch_data); i++) {
-		printf("%ld: %d(%+d) - %d(0) - %d(%+d)\n\r", i,
+		printf(" %ld: %d(%+d) - %d(0) - %d(%+d)\n\r", i,
 			ch_data[i].min, ch_data[i].min - ch_data[i].mid,
 			ch_data[i].mid,
 			ch_data[i].max, ch_data[i].max - ch_data[i].mid
@@ -206,22 +251,7 @@ void at91_tc1_init(void)
 	aic->AIC_SMR[AT91C_ID_TC1] = IRQPRIO_TC1 | AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL;
 	aic->AIC_SVR[AT91C_ID_TC1] = (uint32_t)ppm_isr;
 	aic->AIC_IECR = (1 << AT91C_ID_TC1);
+
+	rcontrol_calibrate(RC_CAL_LOAD);
+	rcontrol_print_cal();
 }
-
-static void tast_monitor(uint32_t status, uint32_t input)
-{
-	if (!(input & TAST1) && (cal_in_progress == 0)) {
-		printf("start calibration\n\r");
-
-		rcontrol_calibrate(RC_CAL_START);
-
-
-	} else if (!(input & TAST2) && (cal_in_progress == 1)) {
-		printf("end calibration\n\r");
-
-		rcontrol_calibrate(RC_CAL_END);
-		rcontrol_print_cal();
-	}
-}
-
-PIO_PINCHANGE_ISR(TAST1 | TAST2, tast_monitor);

src/at91_twi.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - TWI/I2C Handling                                             *
+ *                                                                         *
  *   Copyright (C) 02/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -22,7 +24,6 @@
 #include "AT91SAM7S256.h"
 #include "board.h"
 #include "at91_twi.h"
-#include "at91_pio.h"
 
 /*
  * undocumented TWI_SR flags, at least OVRE seems to be present on a sam7s256
@@ -61,8 +62,6 @@ static void twi_isr(void)
 	if (status & AT91C_TWI_NACK) {
 		*AT91C_TWI_IDR = AT91C_TWI_TXCOMP | AT91C_TWI_RXRDY | AT91C_TWI_TXRDY | AT91C_TWI_NACK;
 		twi_state = TWI_ERROR;
-
-		// TODO: TWI_BLMC_UPDATE?
 		return;
 	}
 
@@ -95,19 +94,15 @@ static void twi_isr(void)
 
 	/* transfer really complete? */
 	if (status & AT91C_TWI_TXCOMP) {
+		uint32_t addr = (*AT91C_TWI_MMR >> 16) & 0x7F;
 
 		/* are we doing a blmc update? */
-		if (twi_state == TWI_BLMC_UPDATE) {
-			uint32_t addr = (*AT91C_TWI_MMR >> 16) & 0x7F;
-			if (addr != TWI_ADDR_BL4) {
-				/* increase address */
-				*AT91C_TWI_MMR += (1<<16);
+		if (twi_state == TWI_BLMC_UPDATE && addr != TWI_ADDR_BL4) {
+			/* increase address */
+			*AT91C_TWI_MMR += (1<<16);
 
-				/* send next value to next blmc */
-				*AT91C_TWI_THR = *twi_data++;
-			} else {
-				// TODO:
-			}
+			/* send next value to next blmc */
+			*AT91C_TWI_THR = *twi_data++;
 
 		} else {
 			*AT91C_TWI_IDR = AT91C_TWI_TXCOMP | AT91C_TWI_RXRDY | AT91C_TWI_TXRDY | AT91C_TWI_NACK;
@@ -118,11 +113,14 @@ static void twi_isr(void)
 
 uint32_t twi_setpwm(uint8_t *values)
 {
+	if (twi_state == TWI_ERROR)
+		twi_state = TWI_IDLE;
+
 	if (twi_state != TWI_IDLE)
 		return 1;
 
 	twi_state = TWI_BLMC_UPDATE;
-	twi_data = values;		/* data is not copied! */
+	twi_data = values;
 	twi_size = 0;
 	twi_count = 0;
 
@@ -135,8 +133,11 @@ uint32_t twi_setpwm(uint8_t *values)
 	return 0;
 }
 
-uint32_t twi_cmd(uint8_t addr, struct blmc_cmd *cmd)
+uint32_t twi_cmd(uint8_t addr, struct twi_cmd *cmd)
 {
+	if (twi_state == TWI_ERROR)
+		twi_state = TWI_IDLE;
+
 	if (twi_state != TWI_IDLE)
 		return 1;
 
@@ -144,7 +145,7 @@ uint32_t twi_cmd(uint8_t addr, struct blmc_cmd *cmd)
 	twi_state = TWI_GENERIC_CMD;
 
 	/* read transfer, or write transfer with payload */
-	if (cmd->mode & BLMC_CMD_READ || cmd->size != 0) {
+	if (cmd->mode & TWI_MODE_READ || cmd->size != 0) {
 		/* set address, direction, argument count and command bytes */
 		*AT91C_TWI_MMR = (addr << 16) | (cmd->mode & 0xFF) << 8;
 		*AT91C_TWI_IADR = cmd->cmd;
@@ -162,7 +163,7 @@ uint32_t twi_cmd(uint8_t addr, struct blmc_cmd *cmd)
 	twi_size = cmd->size;
 	twi_count = 0;
 
-	if (cmd->mode & BLMC_CMD_READ) {
+	if (cmd->mode & TWI_MODE_READ) {
 		*AT91C_TWI_CR = AT91C_TWI_START;
 		*AT91C_TWI_IER = AT91C_TWI_RXRDY | AT91C_TWI_NACK;
 
@@ -185,46 +186,113 @@ uint32_t twi_cmd(uint8_t addr, struct blmc_cmd *cmd)
 	return 0;
 }
 
+uint32_t twi_read_eeprom(uint32_t addr, uint8_t *buf, uint32_t size)
+{
+	struct twi_cmd cmd = {
+		.cmd = (addr & 0x7FFF),
+		.mode = TWI_MODE_READ | TWI_MODE_1_ARG,
+		.size = (size & 0x7FFF),
+		.data = buf,
+	};
+
+	if (twi_cmd(TWI_ADDR_EEPROM, &cmd) != 0)
+		size = 0;
+
+	return size;
+}
+
+uint32_t twi_write_eeprom(uint32_t addr, uint8_t *buf, uint32_t size)
+{
+	uint32_t len = size;
+
+	while (len > 0) {
+		uint32_t count = 0x40 - (addr & 0x3F);
+		if (count > len)
+			count = len;
+
+		/* TODO: write complete polling */
+		volatile uint32_t x;
+		for (x = 0; x < 200000; x++);
+
+		struct twi_cmd cmd = {
+			.cmd = (addr & 0x7FFF),
+			.mode = TWI_MODE_WRITE | TWI_MODE_1_ARG,
+			.size = count,
+			.data = buf,
+		};
+
+		if (twi_cmd(TWI_ADDR_EEPROM, &cmd) != 0)
+			break;
+
+		addr += count;
+		buf += count;
+		len -= count;
+	}
+
+	return size - len;
+}
+
 void at91_twi_test(void)
 {
 	uint32_t i;
 	for (i = TWI_ADDR_BL1; i <= TWI_ADDR_BL4; i++) {
-		struct blmc_cmd cmd = {
-			.cmd = CMD_BOOT_LOADER,
-			.mode = BLMC_CMD_WRITE | BLMC_CMD_0_ARG,
-		};
-		uint32_t ret = twi_cmd(i, &cmd);
-		printf("twi[0x%02lx](%ld) ", i, ret);
+		printf("twi[0x%02lx] ", i);
 
+		struct twi_cmd cmd = {
+			.cmd = CMD_BOOT_LOADER,
+			.mode = TWI_MODE_WRITE | TWI_MODE_0_ARG,
+		};
+		twi_cmd(i, &cmd);
+
+		/* TODO: sleep */
 		volatile uint32_t x;
 		for (x = 0; x < 200000; x++);
 
 		uint8_t buf[16];
-		cmd.cmd = CMD_GET_INFO,
-		cmd.mode = BLMC_CMD_READ | BLMC_CMD_0_ARG,
-		cmd.size = sizeof(buf),
-		cmd.data = buf,
-		ret = twi_cmd(i, &cmd);
-		printf("boot(%ld):'%s' ", ret, buf);
+		buf[0] = '\0';
+		cmd.cmd = CMD_GET_INFO;
+		cmd.mode = TWI_MODE_READ | TWI_MODE_0_ARG;
+		cmd.size = sizeof(buf);
+		cmd.data = buf;
+		twi_cmd(i, &cmd);
+		printf("boot:'%s' ", buf);
+
+		/* TODO: single 32bit write */
+		buf[0] = 0xFF;
+		buf[1] = 0xFF;
+		buf[2] = 0xFF;
 
 		cmd.cmd = CMD_GET_SIGNATURE;
 		cmd.size = 4;
-		ret = twi_cmd(i, &cmd);
-		printf("sig(%ld):0x%02x%02x%02x ", ret, buf[0], buf[1], buf[2]);
+		twi_cmd(i, &cmd);
+		printf("sig:0x%02x%02x%02x\n\r", buf[0], buf[1], buf[2]);
 
 		cmd.cmd = CMD_BOOT_APPLICATION;
-		cmd.mode = BLMC_CMD_WRITE | BLMC_CMD_0_ARG;
+		cmd.mode = TWI_MODE_WRITE | TWI_MODE_0_ARG;
 		cmd.size = 0;
-		ret = twi_cmd(i, &cmd);
+		twi_cmd(i, &cmd);
 
+		/* TODO: sleep */
 		for (x = 0; x < 200000; x++);
 
-		cmd.cmd = CMD_GET_INFO,
-		cmd.mode = BLMC_CMD_READ | BLMC_CMD_0_ARG,
-		cmd.size = sizeof(buf),
-		cmd.data = buf,
-		ret = twi_cmd(i, &cmd);
-		printf("app(%ld):'%s'\n\r", ret, buf);
+		buf[0] = '\0';
+		cmd.cmd = CMD_GET_INFO;
+		cmd.mode = TWI_MODE_READ | TWI_MODE_0_ARG;
+		cmd.size = sizeof(buf);
+		cmd.data = buf;
+		twi_cmd(i, &cmd);
+		printf("          app :'%s' ", buf);
+
+		struct blmc_param param;
+		cmd.cmd = CMD_GET_PARAM;
+		cmd.mode = TWI_MODE_READ | TWI_MODE_0_ARG;
+		cmd.size = sizeof(param);
+		cmd.data = (uint8_t *)&param;
+		twi_cmd(i, &cmd);
+
+		printf("pwm:0x%02x-0x%02x Ilimit:0x%03x Imax:0x%03x\n\r",
+			param.pwm_min, param.pwm_max,
+			param.current_limit, param.current_max);
 	}
 }
 

src/at91_udp.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - USB Device Port with logical Serial Port                     *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -21,9 +23,11 @@
 #include "at91_pio.h"
 #include "board.h"
 #include "fifo.h"
+#include "telemetrie.h"
 
 #include "usb_ch9.h"
 #include "usb_cdc.h"
+#include "usb_dfu.h"
 
 #define csr_clear_flags(csr, flags) \
 	while ((csr) & (flags)) \
@@ -65,6 +69,8 @@ static uint16_t current_address;
 static uint16_t current_config;
 static uint16_t current_interface;
 
+static struct comm_device usb_comm;
+
 static const struct usb_device_descriptor dev_descriptor = {
 	.bLength		= sizeof(struct usb_device_descriptor),
 	.bDescriptorType	= USB_DT_DEVICE,
@@ -73,6 +79,7 @@ static const struct usb_device_descriptor dev_descriptor = {
 	.idVendor		= USB_VENDOR_ID,
 	.idProduct		= USB_PRODUCT_ID +1,
 	.bcdDevice		= 0x0001,
+	.iProduct               = 0x01,
 	.bNumConfigurations	= 1,
 };
 
@@ -87,6 +94,8 @@ struct my_config {
 	struct usb_interface_descriptor		data_iface;
 	struct usb_endpoint_descriptor		dataout_ep;
 	struct usb_endpoint_descriptor		datain_ep;
+	struct usb_interface_descriptor		dfu_iface;
+	struct usb_dfu_descriptor               dfu;
 } __attribute__ ((packed));
 
 static const struct my_config cfg_descriptor = {
@@ -94,7 +103,7 @@ static const struct my_config cfg_descriptor = {
 	.bLength		= sizeof(struct usb_config_descriptor),
 	.bDescriptorType	= USB_DT_CONFIG,
 	.wTotalLength		= sizeof(struct my_config),
-	.bNumInterfaces		= 2,
+	.bNumInterfaces		= 3,
 	.bConfigurationValue	= 1,
 	.bmAttributes		= USB_CONFIG_ATT_SELFPOWER | USB_CONFIG_ATT_WAKEUP,
 	.bMaxPower		= 50,
@@ -163,9 +172,59 @@ static const struct my_config cfg_descriptor = {
 	.bmAttributes		= USB_ENDPOINT_XFER_BULK,
 	.wMaxPacketSize		= 64,
 },
+.dfu_iface = {
+	.bLength                = sizeof(struct usb_interface_descriptor),
+	.bDescriptorType        = USB_DT_INTERFACE,
+	.bInterfaceNumber       = 2,
+	.bInterfaceClass        = USB_CLASS_APP_SPEC,
+	.bInterfaceSubClass     = 0x01, /* DFU */
+	.bInterfaceProtocol     = 0x01,
+},
+.dfu = {
+	.bLength                = sizeof(struct usb_dfu_descriptor),
+	.bDescriptorType        = USB_TYPE_DFU,
+	.bmAttributes           = USB_DFU_CAN_DOWNLOAD | USB_DFU_CAN_UPLOAD | USB_DFU_MANIFEST_TOL | USB_DFU_WILL_DETACH,
+	.wDetachTimeOut         = 0xff00,
+	.wTransferSize          = AT91C_IFLASH_PAGE_SIZE,
+	.bcdDFUVersion          = 0x0101,
+},
 };
 
-static void ep_transfer_send(uint32_t ep, char *data, uint32_t length,
+/* not const! */
+static struct usb_cdc_line_coding cdc_line_coding = {
+	.dwDTERate		= 9600,
+	.bCharFormat		= USB_CDC_1_STOP_BITS,
+	.bParityType		= USB_CDC_NO_PARITY,
+	.bDataBits		= 8,
+};
+
+/* not const! */
+static struct dfu_status dfu_status = {
+	.bStatus		= DFU_STATUS_OK,
+	.bState			= DFU_STATE_appIDLE,
+};
+
+static const struct usb_string_descriptor usb_string0 = {
+	/* String 0 - Language */
+	.bLength = sizeof(struct usb_string_descriptor) + 1 * sizeof(uint16_t),
+	.bDescriptorType = USB_DT_STRING,
+	.wData = { 0x0409 /* English */ },
+};
+
+static const struct usb_string_descriptor usb_string1 = {
+	/* String 1 "sam7fc" */
+	.bLength = sizeof(struct usb_string_descriptor) + 6 * sizeof(uint16_t),
+	.bDescriptorType = USB_DT_STRING,
+	.wData = {
+		0x0073, 0x0061, 0x006d, 0x0037, 0x0066, 0x0063,
+	},
+};
+
+static const struct usb_string_descriptor *usb_strings[] = {
+	&usb_string0, &usb_string1,
+};
+
+void ep_transfer_send(uint32_t ep, char *data, uint32_t length,
 				void (*complete_cb)(void))
 {
 	struct ep_ctx *ctx = &ep_ctx[ep];
@@ -192,7 +251,7 @@ static void ep_transfer_send(uint32_t ep, char *data, uint32_t length,
 	AT91C_UDP_CSR[ep] |= AT91C_UDP_TXPKTRDY;
 }
 
-static void ep_transfer_receive(uint32_t ep, char *data, uint32_t length,
+void ep_transfer_receive(uint32_t ep, char *data, uint32_t length,
 				void (*complete_cb)(void))
 {
 	struct ep_ctx *ctx = &ep_ctx[ep];
@@ -213,7 +272,7 @@ static void ep_transfer_receive(uint32_t ep, char *data, uint32_t length,
 /* stalls the endpoint */
 static void ep_send_stall(uint32_t ep)
 {
-	printf("stall\n\r");
+	printf("usb stall\n\r");
 	AT91C_UDP_CSR[ep] |= AT91C_UDP_FORCESTALL;
 }
 
@@ -236,6 +295,12 @@ static void udp_configure_ep(const struct usb_endpoint_descriptor *desc)
 	*AT91C_UDP_IER = (1 << ep);
 }
 
+static void udp_print_config(void)
+{
+	printf("usb: addr=%d cfg=%d if=%d\n\r",
+		current_address, current_config, current_interface);
+}
+
 /*
  * set local address
  * (USB_REQ_SET_ADDRESS callback)
@@ -244,6 +309,7 @@ static void udp_txcb_setaddress(void)
 {
 	*AT91C_UDP_FADDR = (AT91C_UDP_FEN | current_address);
 	*AT91C_UDP_GLBSTATE = AT91C_UDP_FADDEN;
+	udp_print_config();
 }
 
 /*
@@ -256,19 +322,21 @@ static void udp_txcb_setconfig(void)
 	udp_configure_ep(&cfg_descriptor.datain_ep);
 	udp_configure_ep(&cfg_descriptor.dataout_ep);
 
+	ep_ctx[1].fifo = usb_comm.rxfifo;
+	ep_ctx[1].flags |= CTX_FIFO;
+
+	ep_ctx[2].fifo = usb_comm.txfifo;
+	ep_ctx[2].flags |= CTX_FIFO;
+
 	/* set UDP to "configured" */
 	*AT91C_UDP_GLBSTATE = AT91C_UDP_CONFG;
-}
-
-static void udp_txcb_setinterface(void)
-{
-	printf("claim interface %d\n\r", current_interface);
+	udp_print_config();
 }
 
 static void ep_handle_ctrlrequest(struct usb_ctrlrequest *req)
 {
-	printf("typ:0x%02x req:0x%02x val:0x%04x idx:0x%04x len:0x%04x\n\r",
-		req->bRequestType, req->bRequest, req->wValue, req->wIndex, req->wLength);
+//	printf("typ:0x%02x req:0x%02x val:0x%04x idx:0x%04x len:0x%04x\n\r",
+//		req->bRequestType, req->bRequest, req->wValue, req->wIndex, req->wLength);
 
 	switch (req->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) {
 	case (USB_TYPE_STANDARD | USB_RECIP_DEVICE): /* 0x00/0x80 */
@@ -292,6 +360,24 @@ static void ep_handle_ctrlrequest(struct usb_ctrlrequest *req)
 					NULL);
 				break;
 
+			case USB_DT_STRING: /* 0x03 */
+				;
+				uint8_t index = req->wValue & 0xFF;
+				if (index < ARRAY_SIZE(usb_strings)) {
+					ep_transfer_send(0, (char *)usb_strings[index],
+						MIN(usb_strings[index]->bLength, req->wLength),
+						NULL);
+				} else {
+					ep_send_stall(0);
+				}
+				break;
+
+			case USB_DT_CS_DEVICE: /* 0x21 */
+				ep_transfer_send(0, (char *)&cfg_descriptor.dfu,
+					MIN(sizeof(cfg_descriptor.dfu), req->wLength),
+					NULL);
+				break;
+
 			default:
 				ep_send_stall(0);
 				break;
@@ -310,11 +396,10 @@ static void ep_handle_ctrlrequest(struct usb_ctrlrequest *req)
 		break;
 
 	case (USB_TYPE_STANDARD | USB_RECIP_INTERFACE): /* 0x01/0x81 */
-		// TODO: follow current_interface
 		switch (req->bRequest) {
 		case USB_REQ_SET_INTERFACE: /* 0x0b */
 			current_interface = req->wValue;
-			ep_transfer_send(0, NULL, 0, udp_txcb_setinterface);
+			ep_transfer_send(0, NULL, 0, udp_print_config);
 			break;
 
 		default:
@@ -326,8 +411,21 @@ static void ep_handle_ctrlrequest(struct usb_ctrlrequest *req)
 	case (USB_TYPE_CLASS | USB_RECIP_INTERFACE): /* 0x21/0xA1 */
 		// TODO: follow current_interface
 		switch (req->bRequest) {
+		case USB_REQ_DFU_DETACH: /* 0x00 */
+			dfu_status.bStatus = DFU_STATE_appDETACH;
+			ep_transfer_send(0, NULL, 0, NULL);
+			break;
+
+		case USB_REQ_DFU_GETSTATUS: /* 0x03 */
+			ep_transfer_send(0, (char *)&dfu_status, sizeof(dfu_status), NULL);
+			break;
+
 		case USB_CDC_REQ_SET_LINE_CODING: /* 0x20 */
-			/* read 7 bytes */
+			ep_transfer_receive(0, (char *)&cdc_line_coding, sizeof(cdc_line_coding), NULL);
+			break;
+
+		case USB_CDC_REQ_GET_LINE_CODING: /* 0x21 */
+			ep_transfer_send(0, (char *)&cdc_line_coding, sizeof(cdc_line_coding), NULL);
 			break;
 
 		case USB_CDC_REQ_SET_CONTROL_LINE_STATE: /* 0x22 */
@@ -353,6 +451,10 @@ static void udp_handle_ep(uint32_t ep)
 	if (!(*csr & AT91C_UDP_EPEDS))
 		return;
 
+	/* clear STALLSENT interrupt */
+	if (*csr & AT91C_UDP_STALLSENT)
+		csr_clear_flags(*csr, (AT91C_UDP_STALLSENT | AT91C_UDP_FORCESTALL));
+
 	/* ctrl request packet? */
 	if (*csr & AT91C_UDP_RXSETUP) {
 		struct usb_ctrlrequest req;
@@ -360,6 +462,10 @@ static void udp_handle_ep(uint32_t ep)
 		for (p = (uint8_t *)&req; p < (uint8_t *)(&req +1); p++)
 			*p = AT91C_UDP_FDR[ep];
 
+		/* ack bank0 *now */
+		if (*csr & AT91C_UDP_RX_DATA_BK0)
+			csr_clear_flags(*csr, AT91C_UDP_RX_DATA_BK0);
+
 		/* set data phase transfer direction */
 		if (req.bRequestType & USB_DIR_IN)
 			*csr |= AT91C_UDP_DIR;
@@ -370,15 +476,21 @@ static void udp_handle_ep(uint32_t ep)
 		ep_handle_ctrlrequest(&req);
 	}
 
+	void (* transfer_cb)(void) = NULL;
+
 	/* transmit complete? */
 	if (*csr & AT91C_UDP_TXCOMP) {
 		struct ep_ctx *ctx = &ep_ctx[ep];
 
 		if (ctx->flags & CTX_FIFO) {
 			/* get data from fifo */
-			if (fifo_txudp(ctx->fifo, ep, ctx->maxpktsize))
+			if (fifo_txudp(ctx->fifo, ep, ctx->maxpktsize)) {
 				AT91C_UDP_CSR[ep] |= AT91C_UDP_TXPKTRDY;
 
+			} else {
+				ctx->flags &= ~CTX_IN;
+			}
+
 		} else if ((ctx->flags & (CTX_TRANSFER | CTX_IN)) == (CTX_TRANSFER | CTX_IN)) {
 			/* transfer not complete */
 			struct ep_transfer *transfer = ctx->transfer;
@@ -395,9 +507,7 @@ static void udp_handle_ep(uint32_t ep)
 			/* transfer complete, execute callback */
 			} else {
 				ctx->flags &= ~CTX_IN;
-
-				if (transfer->complete_cb)
-					transfer->complete_cb();
+				transfer_cb = transfer->complete_cb;
 			}
 		}
 
@@ -405,14 +515,9 @@ static void udp_handle_ep(uint32_t ep)
 		*csr &= ~(AT91C_UDP_TXCOMP);
 	}
 
-	/* clear STALLSENT interrupt */
-	if (*csr & AT91C_UDP_STALLSENT)
-		csr_clear_flags(*csr, (AT91C_UDP_STALLSENT | AT91C_UDP_FORCESTALL));
-
 	/* data ready to read? */
 	if (*csr & (AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1)) {
 		struct ep_ctx *ctx = &ep_ctx[ep];
-
 		uint16_t len = (*csr & AT91C_UDP_RXBYTECNT) >> 16;
 
 		// TODO: only ep0 status OUT?
@@ -438,9 +543,7 @@ static void udp_handle_ep(uint32_t ep)
 			/* test again */
 			if (transfer->length == transfer->curpos) {
 				ctx->flags &= ~CTX_OUT;
-
-				if (transfer->complete_cb)
-					transfer->complete_cb();
+				transfer_cb = transfer->complete_cb;
 			}
 		}
 
@@ -459,6 +562,9 @@ static void udp_handle_ep(uint32_t ep)
 			ctx->flags = (ctx->flags & ~CTX_RXBANK1) | CTX_RXBANK0;
 		}
 	}
+
+	if (transfer_cb)
+		transfer_cb();
 }
 
 static void udp_isr(void)
@@ -488,6 +594,12 @@ static void udp_isr(void)
 		udp->UDP_IDR = AT91C_UDP_EPINT1 | AT91C_UDP_EPINT2 | AT91C_UDP_EPINT3 |
 				AT91C_UDP_RXSUSP | AT91C_UDP_RXRSM | AT91C_UDP_SOFINT |
 				AT91C_UDP_WAKEUP;
+
+		if (dfu_status.bStatus == DFU_STATE_appDETACH) {
+			void (* bootloader)(void) = (void *)0x13c000;
+			bootloader();
+			while (1);
+		}
 	}
 
 	/* Handle Endpoint Interrupts */
@@ -502,6 +614,21 @@ static void udp_isr(void)
 				AT91C_UDP_ENDBUSRES | AT91C_UDP_WAKEUP);
 }
 
+static void trigger_fifo_tx(void)
+{
+	struct ep_ctx *ctx = &ep_ctx[2];
+
+	/* currently transmitting, no need to trigger */
+	// TODO: racy?
+	if (ctx->flags & CTX_IN)
+		return;
+
+	if (fifo_txudp(ctx->fifo, 2, ctx->maxpktsize)) {
+		ctx->flags |= CTX_IN;
+		AT91C_UDP_CSR[2] |= AT91C_UDP_TXPKTRDY;
+	}
+}
+
 void at91_udp_init(void)
 {
 	/* configure & disable Pullup, disable Pullup von VBUS */
@@ -509,8 +636,6 @@ void at91_udp_init(void)
 	pio->PIO_CODR = UDP_PULLUP;
 	pio->PIO_PER = UDP_PULLUP;
 	pio->PIO_OER = UDP_PULLUP;
-	// TODO: needed?
-	pio->PIO_PPUDR = UDP_VBUS_MON;
 
 	/* UDPCK (48MHz) = PLLCK / 2 */
 	*AT91C_CKGR_PLLR |= AT91C_CKGR_USBDIV_1;
@@ -536,6 +661,12 @@ void at91_udp_init(void)
 	aic->AIC_SVR[AT91C_ID_UDP] = (uint32_t)udp_isr;
 	aic->AIC_IECR = (1 << AT91C_ID_UDP);
 
+	usb_comm.rxfifo = fifo_alloc(1024);
+	usb_comm.txfifo = fifo_alloc(1024);
+	usb_comm.trigger_tx = trigger_fifo_tx;
+
+	tdc_register_device(0, &usb_comm);
+
 	pio_trigger_isr(UDP_VBUS_MON);
 }
 
@@ -543,10 +674,10 @@ static void udp_vbus_monitor(uint32_t status, uint32_t input)
 {
 	if (input & UDP_VBUS_MON)
 		/* usb connected -> enable pullup */
-		*AT91C_PIOA_SODR = UDP_PULLUP;
+		*AT91C_PIOA_CODR = UDP_PULLUP;
 	else
 		/* usb got diconnected -> disable pullup */
-		*AT91C_PIOA_CODR = UDP_PULLUP;
+		*AT91C_PIOA_SODR = UDP_PULLUP;
 }
 
 PIO_PINCHANGE_ISR(UDP_VBUS_MON, udp_vbus_monitor);

src/fifo.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - FIFOs for use with PDC / USB Hardware                        *
+ *                                                                         *
  *   Copyright (C) 01/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -29,7 +31,7 @@
  * all other operations don't need locks:
  * - only fifo_put/fifo_rxpdc are allowed to increment fifo->in
  * - only fifo_get/fifo_txpdc are allowed to increment fifo->out
- * a integer overflow (4gb) of fifo->in / fifo->out could cause trouble
+ * FIXME: a integer overflow (4gb) of fifo->in / fifo->out could cause trouble
  */
 static uint32_t fifo_used(struct fifo *fifo)
 {

src/flightctrl.c

@@ -0,0 +1,264 @@
+/***************************************************************************
+ *   sam7fc - Flight Control                                               *
+ *                                                                         *
+ *   Copyright (C) 03/2008 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; version 2 of the License                *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>	/* abs() */
+
+#include "AT91SAM7S256.h"
+#include "board.h"
+
+#include <at91_adc.h>
+#include <at91_pitc.h>
+#include <at91_tc1.h>
+#include <at91_twi.h>
+#include <telemetrie.h>
+#include <pidctrl.h>
+
+static uint32_t global_state;
+#define MOTOR_RUNNING			0x0001
+#define MOTOR_MIXER_ENABLE		0x0002
+#define STICK_CALIBRATION		0x0004
+#define STICK_CALIBRATION_COMPLETE	0x0008
+
+static struct pid_data pid_nick = {
+	.kp = 1,
+	.ki = 0,
+	.err_sum_max = +1024,
+	.err_sum_min = -1024,
+	.out_max = +256,
+	.out_min = -256,
+};
+TDC_PTR(pid_nick_ki, &pid_nick.ki, "flctrl: pid nick ki", int32_t, TDC_SIGNED);
+TDC_PTR(pid_nick_errsum, &pid_nick.err_sum, "flctrl: pid nick errsum", int32_t, TDC_SIGNED | TDC_READONLY);
+
+static struct pid_data pid_roll = {
+	.kp = 1,
+	.ki = 0,
+	.err_sum_max = +1024,
+	.err_sum_min = -1024,
+	.out_max = +256,
+	.out_min = -256,
+};
+TDC_PTR(pid_roll_ki, &pid_roll.ki, "flctrl: pid roll ki", int32_t, TDC_SIGNED);
+TDC_PTR(pid_roll_errsum, &pid_roll.err_sum, "flctrl: pid roll errsum", int32_t, TDC_SIGNED | TDC_READONLY);
+
+static struct pid_data pid_gier = {
+	.kp = 1,
+	.ki = 0,
+	.err_sum_max = +1024,
+	.err_sum_min = -1024,
+	.out_max = +256,
+	.out_min = -256,
+};
+TDC_PTR(pid_gier_ki, &pid_gier.ki, "flctrl: pid gier ki", int32_t, TDC_SIGNED);
+TDC_PTR(pid_gier_errsum, &pid_gier.err_sum, "flctrl: pid gier errsum", int32_t, TDC_SIGNED | TDC_READONLY);
+
+static void motor_mixer(int32_t gas, int32_t nick, int32_t roll, int32_t gier)
+{
+	static uint8_t pwm[4];
+
+	TDC_VALUE(pwm0, pwm[0], "Motor PWM 1", uint8_t, TDC_UNSIGNED | TDC_READONLY);
+	TDC_VALUE(pwm1, pwm[1], "Motor PWM 2", uint8_t, TDC_UNSIGNED | TDC_READONLY);
+	TDC_VALUE(pwm2, pwm[2], "Motor PWM 3", uint8_t, TDC_UNSIGNED | TDC_READONLY);
+	TDC_VALUE(pwm3, pwm[3], "Motor PWM 4", uint8_t, TDC_UNSIGNED | TDC_READONLY);
+
+	pwm[0] = LIMIT((gas - nick + gier), 0x0F, 0xFF);
+	pwm[1] = LIMIT((gas + nick + gier), 0x0F, 0xFF);
+	pwm[2] = LIMIT((gas + roll - gier), 0x0F, 0xFF);
+	pwm[3] = LIMIT((gas - roll - gier), 0x0F, 0xFF);
+
+	if (!(global_state & MOTOR_RUNNING)) {
+		pwm[0] = 0x00;
+		pwm[1] = 0x00;
+		pwm[2] = 0x00;
+		pwm[3] = 0x00;
+
+	} else if (!(global_state & MOTOR_MIXER_ENABLE)) {
+		pwm[0] = 0x0F;
+		pwm[1] = 0x0F;
+		pwm[2] = 0x0F;
+		pwm[3] = 0x0F;
+	}
+
+	twi_setpwm(pwm);
+}
+
+static uint32_t base_ctrl_cb(struct pitc_timer *timer)
+{
+	if (global_state & STICK_CALIBRATION)
+		global_state |= STICK_CALIBRATION_COMPLETE;
+
+	return PITC_REMOVE_TIMER;
+}
+
+static struct pitc_timer base_ctrl_timer = {
+	.func = base_ctrl_cb,
+};
+
+void base_ctrl(void)
+{
+	static int32_t nick_integral, roll_integral, gier_integral;
+
+	/* get stick switches & values */
+	struct rc_values rc_sw;
+	uint32_t count = rcontrol_getswitches(&rc_sw);
+
+	if (count < 4) {
+		global_state &= ~MOTOR_RUNNING;
+
+	} else if (global_state & STICK_CALIBRATION_COMPLETE) {
+//		rcontrol_calibrate(RC_CAL_END);
+//		rcontrol_calibrate(RC_CAL_SAVE);
+		rcontrol_print_cal();
+		global_state &= ~(STICK_CALIBRATION | STICK_CALIBRATION_COMPLETE);
+
+	} else if (global_state & STICK_CALIBRATION) {
+		/* do nothing during calibration */
+
+	} else if (count >= 4) {
+		/* Motor stop */
+		if (rc_sw.chan[2] < 0 && rc_sw.chan[3] > 0)
+			global_state &= ~MOTOR_RUNNING;
+
+		/* Motor start */
+		if (rc_sw.chan[2] < 0 && rc_sw.chan[3] < 0)
+			global_state |= MOTOR_RUNNING;
+
+		/* Gyro calibration */
+		if (rc_sw.chan[2] > 0 && rc_sw.chan[3] > 0)
+			adc_calibrate(ADC_CAL_GYRO);
+
+		/* ACC + Stick calibration */
+		if (rc_sw.chan[2] > 0 && rc_sw.chan[3] < 0) {
+			adc_calibrate(ADC_CAL_ACC);
+//			rcontrol_calibrate(RC_CAL_START);
+			global_state |= STICK_CALIBRATION;
+			base_ctrl_timer.interval = 1000;
+			pitc_schedule_timer(&base_ctrl_timer);
+		}
+	}
+
+	struct rc_values rc;
+	rcontrol_getvalues(&rc);
+
+	if (rc.chan[2] < 15) {
+		global_state &= ~MOTOR_MIXER_ENABLE;
+
+		/* reset integrals */
+		nick_integral = roll_integral = gier_integral = 0;
+		pid_nick.err_sum = pid_roll.err_sum = pid_gier.err_sum = 0;
+
+	} else {
+		global_state |= MOTOR_MIXER_ENABLE;
+	}
+
+	/* get adc results */
+	static int16_t adc_result[7];
+
+	TDC_PTR(adc_result0, &adc_result[ADC_GYRO_NICK], "ADC_GYRO_NICK", int16_t, TDC_SIGNED | TDC_READONLY);
+	TDC_PTR(adc_result1, &adc_result[ADC_GYRO_ROLL], "ADC_GYRO_ROLL", int16_t, TDC_SIGNED | TDC_READONLY);
+	TDC_PTR(adc_result2, &adc_result[ADC_GYRO_GIER], "ADC_GYRO_GIER", int16_t, TDC_SIGNED | TDC_READONLY);
+	TDC_PTR(adc_result3, &adc_result[ADC_ACC_NICK], "ADC_ACC_NICK", int16_t, TDC_SIGNED | TDC_READONLY);
+	TDC_PTR(adc_result4, &adc_result[ADC_ACC_ROLL], "ADC_ACC_ROLL", int16_t, TDC_SIGNED | TDC_READONLY);
+	TDC_PTR(adc_result5, &adc_result[ADC_ACC_GIER], "ADC_ACC_GIER", int16_t, TDC_SIGNED | TDC_READONLY);
+	TDC_PTR(adc_result6, &adc_result[ADC_VOLTAGE], "ADC_VOLTAGE", int16_t, TDC_SIGNED | TDC_READONLY);
+
+	adc_get_results(adc_result);
+
+	if (count != 0 && adc_result[ADC_VOLTAGE] > 960)
+		*AT91C_PIOA_CODR = LED_GREEN;
+	else
+		*AT91C_PIOA_SODR = LED_GREEN;
+
+	nick_integral += adc_result[ADC_GYRO_NICK];
+	TDC_INT32(nick_integral, "flctrl: Base Integral Nick");
+
+	roll_integral += adc_result[ADC_GYRO_ROLL];
+	TDC_INT32(roll_integral, "flctrl: Base Integral Roll");
+
+	gier_integral += adc_result[ADC_GYRO_GIER];
+	TDC_INT32(gier_integral, "flctrl: Base Integral Gier");
+
+	static int32_t integral_gyro_mix = 1;
+	TDC_INT32(integral_gyro_mix, "flctrl: Mix Integral/ACC (0-1024)");
+
+	static int32_t acc_faktor = 300;
+	TDC_INT32(acc_faktor, "flctrl: Mix Faktor");
+
+	/*
+	 * 90° -> ADC_ACC_* ~210
+	 * 90° -> Integral ~60000
+	 */
+	int32_t mix_integral = 1024 - integral_gyro_mix;
+	int32_t mix_acc = integral_gyro_mix * acc_faktor;
+	nick_integral = ((nick_integral * mix_integral) + (adc_result[ADC_ACC_NICK] * mix_acc)) / 1024;
+	roll_integral = ((roll_integral * mix_integral) + (adc_result[ADC_ACC_ROLL] * mix_acc)) / 1024;
+
+	/*
+	 * hoher gyro_faktor -> bessere stabilität, aber langsames zurückkehren nach vollausschlag
+	 * niedriger integral_faktor -> geringere abweichungbei einseitigem anheben, aber schwingungsanfälliger
+	 */
+	static int32_t integral_faktor = 256;
+	static int32_t gyro_faktor = 4;
+	TDC_INT32(integral_faktor, "flctrl: Integral Divisior");
+	TDC_INT32(gyro_faktor, "flctrl: Integral Gyro Faktor /16");
+
+	static int32_t nick;
+	static int32_t roll;
+	static int32_t gier;
+	nick = (nick_integral / integral_faktor) + (adc_result[ADC_GYRO_NICK] * gyro_faktor) / 16;
+	roll = (roll_integral / integral_faktor) + (adc_result[ADC_GYRO_ROLL] * gyro_faktor) / 16;
+	gier = (gier_integral / integral_faktor) + (adc_result[ADC_GYRO_GIER] * gyro_faktor) / 16;
+	TDC_INT32_RO(nick, "flctrl: Integral + Gyro Nick");
+	TDC_INT32_RO(roll, "flctrl: Integral + Gyro Roll");
+	TDC_INT32_RO(gier, "flctrl: Integral + Gyro Gier");
+
+	static int32_t stick_kp = 8;
+	TDC_INT32(stick_kp, "flctrl: Stick-P /16");
+
+	static int32_t stick_gas, stick_nick, stick_roll, stick_gier;
+	stick_gas = rc.chan[2];
+	stick_nick = (rc.chan[0] * stick_kp) / 16;
+	stick_roll = (rc.chan[1] * stick_kp) / 16;
+	stick_gier = rc.chan[3] / 4;
+
+	TDC_INT32_RO(stick_gas, "Stick Gas");
+	TDC_INT32_RO(stick_nick, "Stick Nick");
+	TDC_INT32_RO(stick_roll, "Stick Roll");
+	TDC_INT32_RO(stick_gier, "Stick Gier");
+
+	static int32_t gier_kp = 32;
+	TDC_INT32(gier_kp, "flctrl: Gier-P (/256)");
+	gier_integral -= gier_kp * stick_gier * abs(stick_gier) / 256;
+
+	static int32_t mixer_gas, mixer_nick, mixer_roll, mixer_gier;
+	mixer_gas = stick_gas;
+	mixer_nick = pid_ctrl(&pid_nick, stick_nick - nick);
+	mixer_roll = pid_ctrl(&pid_roll, stick_roll - roll);
+	mixer_gier = pid_ctrl(&pid_gier, stick_gier - gier);
+
+	/* mix gas/nick/roll/gier -> 4 motors */
+	motor_mixer(mixer_gas, mixer_nick, mixer_roll, mixer_gier);
+
+	TDC_INT32_RO(mixer_gas, "Mixer Gas");
+	TDC_INT32_RO(mixer_nick, "Mixer Nick");
+	TDC_INT32_RO(mixer_roll, "Mixer Roll");
+	TDC_INT32_RO(mixer_gier, "Mixer Gier");
+}

src/memalloc.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - dynamic Memory Allocation                                    *
+ *                                                                         *
  *   Copyright (C) 02/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *

src/pidctrl.c

@@ -0,0 +1,44 @@
+/***************************************************************************
+ *   Copyright (C) 03/2008 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; version 2 of the License                *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <stdint.h>
+
+#include "pidctrl.h"
+#include "board.h"
+
+int32_t pid_ctrl(struct pid_data *pid, int32_t error)
+{
+	int32_t out = 0;
+
+	if (pid->kp != 0)
+		out += pid->kp * error;
+
+	if (pid->ki != 0) {
+		pid->err_sum += error;
+		pid->err_sum = LIMIT(pid->err_sum, pid->err_sum_min, pid->err_sum_max);
+
+		out += (pid->err_sum / pid->ki);
+	}
+
+	if (pid->kd != 0) {
+		out += pid->kd * (error - pid->err_old);
+		pid->err_old = error;
+	}
+
+	return LIMIT(out, pid->out_min, pid->out_max);
+}

src/telemetrie.c

@@ -1,4 +1,6 @@
 /***************************************************************************
+ *   sam7fc - Telemetrie Handling                                          *
+ *                                                                         *
  *   Copyright (C) 02/2008 by Olaf Rempel                                  *
  *   razzor@kopf-tisch.de                                                  *
  *                                                                         *
@@ -22,9 +24,12 @@
 #include "board.h"		// ARRAY_SIZE()
 #include "at91_pitc.h"
 #include "telemetrie.h"
+#include "tdc_proto.h"
 #include "memalloc.h"
 #include "fifo.h"
 
+#define TDC_OWN_ADDRESS		TDC_ADDR1
+
 /* extern symbols, defined in ldscript */
 extern struct tdc_value _tdc_value_table;
 extern struct tdc_value _tdc_value_table_end;
@@ -46,7 +51,11 @@ int32_t tdc_transmit(uint32_t addr, struct tdc_pkt_header *head)
 	if (addr >= ARRAY_SIZE(routing_table) || !routing_table[addr])
 		return -1;
 
-	return fifo_put(routing_table[addr]->txfifo, (char *)head, head->size);
+	int32_t retval = fifo_put(routing_table[addr]->txfifo, (char *)head, head->size);
+	if (routing_table[addr]->trigger_tx)
+		routing_table[addr]->trigger_tx();
+
+	return retval;
 }
 
 static int32_t tdc_get_vars(void)
@@ -62,8 +71,9 @@ static int32_t tdc_get_vars(void)
 		struct tdc_getvars_reply *reply = alloc(sizeof(struct tdc_getvars_reply) + datalen);
 		reply->cmd = TDC_REPLY | TDC_ADDR1 | TDC_GETVARS;
 		reply->size = sizeof(struct tdc_getvars_reply) + datalen;
-		reply->id = id;
+		reply->id = (id & 0xFF);
 		reply->flags = value->flags;
+		reply->name_len = datalen;
 		memcpy(reply->name, value->name, datalen);
 
 		uint32_t ret = tdc_transmit(TDC_ADDR0, ((struct tdc_pkt_header *)reply));
@@ -92,7 +102,7 @@ static int32_t tdc_get_value(uint32_t id)
 
 	struct tdc_getvalue_reply *reply = alloc(sizeof(struct tdc_getvalue_reply) + datalen);
 	reply->cmd = TDC_REPLY | TDC_ADDR1 | TDC_GETVALUE;
-	reply->size = sizeof(struct tdc_getvars_reply) + datalen;
+	reply->size = sizeof(struct tdc_getvalue_reply) + datalen;
 	reply->id = id;
 	memcpy(reply->data, value->data, datalen);
 
@@ -102,36 +112,37 @@ static int32_t tdc_get_value(uint32_t id)
 	return ret;
 }
 
-static int32_t tdc_set_value(uint32_t id, uint8_t *data)
+static int32_t tdc_set_value(uint32_t id, uint8_t *data, uint32_t data_size)
 {
 	struct tdc_value *value = &_tdc_value_table + id;
 	if (value >= &_tdc_value_table_end)
 		return -1;
 
-	uint32_t datalen = value->flags & TDC_SIZEMASK;
+	uint32_t len = value->flags & TDC_SIZEMASK;
+
+	if (len != data_size)
+		return -1;
 
 	// TODO: atomic?
-	memcpy(value->data, data, datalen);
-
-	return 1;
+	memcpy(value->data, data, len);
+	return len;
 }
 
 static uint32_t tdc_timer_cb(struct pitc_timer *timer)
 {
 	uint32_t i, j;
 	for (i = 0; i < ARRAY_SIZE(tdc_varmap); i++) {
-		uint32_t tmp = tdc_varmap[i];
+		uint32_t bitmask = tdc_varmap[i];
 
 		for (j = 0; j < 32; j++) {
-			if (!tmp)
+			if (!bitmask)
 				break;
 
-			if (tmp & 0x01) {
-				if (tdc_get_value(i * 32 + j) <= 0)
-					return PITC_REMOVE_TIMER;
+			if (bitmask & 0x01) {
+				if (tdc_get_value(i * 32 + j) < 0)
+					tdc_varmap[i] &= ~(1 << j);
 			}
-
-			tmp >>= 1;
+			bitmask >>= 1;
 		}
 	}
 	return PITC_RESTART_TIMER;
@@ -145,111 +156,183 @@ static int32_t tdc_setup_timer(uint32_t interval, uint32_t *varmap)
 {
 	memcpy(tdc_varmap, varmap, sizeof(tdc_varmap));
 
-	if (interval > 0) {
+	uint32_t i;
+	uint32_t tmp = 0;
+	for (i = 0; i < ARRAY_SIZE(tdc_varmap); i++)
+		tmp |= tdc_varmap[i];
+
+	if ((interval > 0) && (tmp != 0)) {
 		tdc_timer.interval = interval;
-		// TODO: timer already running
 		pitc_schedule_timer(&tdc_timer);
 
 	} else {
-		// TODO: timer stop
+		pitc_remove_timer(&tdc_timer);
 	}
 	return 1;
 }
 
 static const struct tdc_hello_reply hello_reply = {
-	.cmd = TDC_REPLY | TDC_ADDR1 | TDC_HELLO,
+	.cmd = TDC_REPLY | TDC_OWN_ADDRESS | TDC_HELLO,
 	.size = sizeof(struct tdc_hello_reply),
 	.name = "sam7fc-v0.01",
 };
 
-/*
- * returns:
- * -1: on routing error
- *  0: no space left in txfifo (caller should retry)
- * >0: success
- */
-static int32_t tdc_parse_packet(struct tdc_pkt_header *head)
-{
-	/* all replys go to the HOST */
-	if (head->cmd & TDC_REPLY)
-		return tdc_transmit(TDC_ADDR0, head);
-
-	/* forward this packet? */
-	if ((head->cmd & TDC_ADDRMASK) != TDC_ADDR1) {
-		uint32_t addr = (head->cmd & TDC_ADDRMASK) >> 4;
-		return tdc_transmit(addr, head);
-	}
-
-	int32_t ret = -1;
-
-	/* parse the packet */
-	switch (head->cmd & TDC_OPCODEMASK) {
-	case TDC_HELLO:
-		/* answer the hello */
-		ret = tdc_transmit(TDC_ADDR0, (struct tdc_pkt_header *)&hello_reply);
-		break;
-
-	case TDC_GETVARS:
-		ret = tdc_get_vars();
-		break;
-
-	case TDC_GETVALUE: {
-		struct tdc_getvalue_request *pkt = (struct tdc_getvalue_request *)head;
-		ret = tdc_get_value(pkt->id);
-	}	break;
-
-	case TDC_SETVALUE: {
-		struct tdc_setvalue_request *pkt = (struct tdc_setvalue_request *)head;
-		ret = tdc_set_value(pkt->id, pkt->data);
-	}	break;
-
-	case TDC_REQVALUES: {
-		struct tdc_reqvalues_request *pkt = (struct tdc_reqvalues_request *)head;
-		ret = tdc_setup_timer(pkt->interval, pkt->varmap);
-	}	break;
-	};
-
-	/*
-	 * on succes(>0) return size of request,
-	 * and push retry(0) and routing error(-1) up
-	 */
-	return (ret > 0) ? head->size : ret;
-}
-
 void tdc_register_device(uint32_t addr, struct comm_device *device)
 {
 	if (addr < ARRAY_SIZE(routing_table))
 		routing_table[addr] = device;
 }
 
-void tdc_receive(struct comm_device *device)
+struct tdc_pkt_header * tdc_alloc_fullpkt(struct comm_device *device, uint32_t size)
 {
-	while (1) {
-		/* peek the header */
-		struct tdc_pkt_header tmp_head;
-		uint32_t len = fifo_peek(device->rxfifo, (char *)&tmp_head, sizeof(tmp_head));
-		if (len != sizeof(tmp_head))
-			return;
+	struct tdc_pkt_header *head = alloc(size);
 
-		/* peek the whole packet */
-		struct tdc_pkt_header *head = alloc(tmp_head.size);
-		len = fifo_peek(device->rxfifo, (char *)head, tmp_head.size);
-		if (len != tmp_head.size)
-			return;
+	/* peek the whole packet */
+	uint32_t len = fifo_peek(device->rxfifo, (char *)head, size);
+	if (len != size) {
+		free(head);
+		head = NULL;
+	}
 
-		/* if it's a hello-request, remember the device as path to the host */
-		if ((head->cmd & (TDC_OPCODEMASK & TDC_DIR)) == TDC_HELLO)
-			tdc_register_device(TDC_ADDR0, device);
+	return head;
+}
 
-		/* parse packet, remove data if no restart is needed */
-		int32_t ret = tdc_parse_packet(head);
+static int32_t tdc_receive(struct comm_device *device)
+{
+	struct tdc_pkt_header tmp_head;
+	struct tdc_pkt_header *head = &tmp_head;
+
+	/* peek the header, return retry(0) if not enough bytes are available */
+	uint32_t len = fifo_peek(device->rxfifo, (char *)head, sizeof(tmp_head));
+	if (len != sizeof(tmp_head))
+		return 0;
+
+	/* assume an error, remove one byte from fifo */
+	uint32_t used_bytes = 1;
+	int32_t ret = -1;
+
+	/* remember the device as path to the host */
+	if ((head->cmd & (TDC_REPLY | TDC_OPCODEMASK)) == TDC_HELLO) {
+		tdc_register_device(TDC_ADDR0, device);
+	}
+
+	/* reply packets / forward packets */
+	if (head->cmd & TDC_REPLY || (head->cmd & TDC_ADDRMASK) != TDC_OWN_ADDRESS) {
+		/* peek complete packet, return retry(0) if not enough bytes are available */
+		head = tdc_alloc_fullpkt(device, head->size);
+		if (head == NULL)
+			return 0;
+
+		/* reply packets go to ADDR0, forwards to others */
+		uint32_t addr = (head->cmd & TDC_REPLY) ? TDC_ADDR0 : ((head->cmd & TDC_ADDRMASK) >> 4);
+
+		used_bytes = head->size;
+		ret = tdc_transmit(addr, head);
+
+	} else {
+		/* parse cmd */
+		switch (head->cmd & TDC_OPCODEMASK) {
+		case TDC_HELLO: {
+			/* check packet size */
+			struct tdc_pkt_header *pkt = (struct tdc_pkt_header *)head;
+			if (pkt->size != sizeof(*pkt))
+				break;
+
+			/* send reply */
+			ret = tdc_transmit(TDC_ADDR0, (struct tdc_pkt_header *)&hello_reply);
+			used_bytes = pkt->size;
+		}	break;
+
+		case TDC_GETVARS: {
+			struct tdc_pkt_header *pkt = (struct tdc_pkt_header *)head;
+			if (pkt->size != sizeof(*pkt))
+				break;
+
+			/* send reply */
+			ret = tdc_get_vars();
+			used_bytes = pkt->size;
+		}	break;
+
+		case TDC_GETVALUE: {
+			struct tdc_getvalue_request *pkt = (struct tdc_getvalue_request *)head;
+			if (pkt->size != sizeof(*pkt))
+				break;
+
+			/* peek complete packet, return retry(0) if not enough bytes are available */
+			head = tdc_alloc_fullpkt(device, head->size);
+			if (head != NULL) {
+				pkt = (struct tdc_getvalue_request *)head;
+				ret = tdc_get_value(pkt->id);
+				used_bytes = pkt->size;
+
+			} else {
+				ret = 0;
+			}
+		}	break;
+
+		case TDC_SETVALUE: {
+			struct tdc_setvalue_request *pkt = (struct tdc_setvalue_request *)head;
+			if (pkt->size < sizeof(*pkt) +1 || pkt->size > sizeof(*pkt) +8)
+				break;
+
+			/* peek complete packet, return retry(0) if not enough bytes are available */
+			head = tdc_alloc_fullpkt(device, head->size);
+			if (head != NULL) {
+				pkt = (struct tdc_setvalue_request *)head;
+				ret = tdc_set_value(pkt->id, pkt->data, pkt->size - sizeof(*pkt));
+				used_bytes = pkt->size;
+
+			} else {
+				ret = 0;
+			}
+		}	break;
+
+		case TDC_REQVALUES: {
+			struct tdc_reqvalues_request *pkt = (struct tdc_reqvalues_request *)head;
+			if (pkt->size != sizeof(*pkt))
+				break;
+
+			/* peek complete packet, return retry(0) if not enough bytes are available */
+			head = tdc_alloc_fullpkt(device, head->size);
+			if (head != NULL) {
+				pkt = (struct tdc_reqvalues_request *)head;
+				ret = tdc_setup_timer(pkt->interval, pkt->varmap);
+				used_bytes = pkt->size;
+
+			} else {
+				ret = 0;
+			}
+		}	break;
+
+		}
+	}
+
+	/* on success(>0) or routing error(-1) remove the packet */
+	if (ret != 0) {
+		/* remove bytes from fifo */
+		fifo_remove(device->rxfifo, used_bytes);
+	}
+
+	/* free allocated memory */
+	if (head != NULL && head != &tmp_head)
 		free(head);
 
-		/* some tx-fifo was full(0), return to caller and let it retry */
-		if (!ret)
-			return;
+	return ret;
+}
 
-		/* success(>0) or routing error(-1) -> remove the packet */
-		fifo_remove(device->rxfifo, tmp_head.size);
+void tdc_check(void)
+{
+	uint32_t i;
+	for (i = 0; i < ARRAY_SIZE(routing_table); i++) {
+		if (routing_table[i] != NULL) {
+			tdc_receive(routing_table[i]);
+			// TODO: handle retry
+		}
 	}
 }
+
+void tdc_init(void)
+{
+	uint32_t count = &_tdc_value_table_end - &_tdc_value_table;
+	printf("found %ld TDC variables\n\r", count);
+}