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new i2c protocol

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This commit is contained in:
Olaf Rempel 2010-12-26 19:32:28 +01:00
parent ce8fbde9dd
commit a7fcfaf7b9
2 changed files with 158 additions and 94 deletions
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7
Makefile
View File

@ -1,6 +1,6 @@
PRG = fc_boot PRG = fc_boot
OBJ = main.o OBJ = main.o
MCU_TARGET = atmega644 MCU_TARGET = atmega644p
OPTIMIZE = -Os OPTIMIZE = -Os
DEFS = DEFS =
@ -22,7 +22,7 @@ $(PRG).elf: $(OBJ)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
clean: clean:
rm -rf *.o *.lst *.map $(PRG).elf *.hex *.bin rm -rf *.o $(PRG).lst $(PRG).map $(PRG).elf $(PRG).hex $(PRG).bin
lst: $(PRG).lst lst: $(PRG).lst
@ -41,5 +41,4 @@ bin: $(PRG).bin
$(OBJCOPY) -j .text -j .data -O binary $< $@ $(OBJCOPY) -j .text -j .data -O binary $< $@
install: text install: text
# uisp -dprog=avr910 -dserial=/dev/ttyS0 -dspeed=115200 -dpart=M8 --erase --upload if=$(PRG).hex avrdude -c dragon_isp -P usb -p m644p -B0.3 -V -U flash:w:$(PRG).hex
avrdude -p m644 -c butterfly -b 115200 -P /dev/ttyS0 -u -V -U flash:w:$(PRG).hex

243
main.c
View File

@ -22,39 +22,50 @@
#include <avr/pgmspace.h> #include <avr/pgmspace.h>
#include <avr/wdt.h> #include <avr/wdt.h>
#include <stdio.h> /*
* ATMega 644P:
* Fuse E: 0xFD (2.7V BOD)
* Fuse H: 0xDA (2048 words bootloader)
* Fuse L: 0xFF (ext. Crystal)
*/
#define F_CPU 20000000 #define F_CPU 20000000
#include <util/delay.h> #include <util/delay.h>
#define BAUDRATE 19200 #define BAUDRATE 57600
#define UART_CALC_BAUDRATE(baudRate) ((uint32_t)(F_CPU) / ((uint32_t)(baudRate)*16) -1) #define UART_CALC_BAUDRATE(baudRate) ((uint32_t)(F_CPU) / ((uint32_t)(baudRate)*16) -1)
#define APP_END 0xF000 #define APP_END 0xF000
#define LED_RT (1<<PORTB0) #define LED_RT (1<<PORTB0) /* low active */
#define LED_GN (1<<PORTB1) #define LED_GN (1<<PORTB1) /* high active */
#define TWI_CLK 100000 #define TWI_CLK 100000
#define TWI_ADDRESS_BASE 0x20 /* 0x21 - 0x24 */
#define WRITE_COOKIE 0x4711 #define TWI_DEVCODE 0x77 /* Mega8 */
#define OWN_DEVCODE 0x74 /* Mega644 */
#define OWN_SIGNATURE { 0x1E, 0x96, 0x0A } /* Mega644P */
/* SLA+R */
#define CMD_WAIT 0x00 #define CMD_WAIT 0x00
#define CMD_GET_INFO 0x10 #define CMD_READ_VERSION 0x01
#define CMD_GET_SIGNATURE 0x11 #define CMD_READ_MEMORY 0x02
#define CMD_WRITE_FLASH 0x12
#define CMD_READ_FLASH 0x13
#define CMD_WRITE_EEPROM 0x14
#define CMD_READ_EEPROM 0x15
#define CMD_BOOT_APPLICATION 0x1F
#define CMD_SET_PWM 0x21 /* SLA+W */
#define CMD_GET_STATUS 0x22 #define CMD_SWITCH_APPLICATION CMD_READ_VERSION
// #define CMD_SET_PARAM 0x23 #define CMD_WRITE_MEMORY CMD_READ_MEMORY
// #define CMD_GET_PARAM 0x24
#define CMD_BOOT_LOADER 0x2F /* CMD_SWITCH_APPLICATION parameter */
#define BOOTTYPE_BOOTLOADER 0x00
#define BOOTTYPE_APPLICATION 0x80
/* CMD_{READ|WRITE}_* parameter */
#define MEMTYPE_CHIPINFO 0x00
#define MEMTYPE_FLASH 0x01
#define MEMTYPE_EEPROM 0x02
#define MEMTYPE_PARAMETERS 0x03
#define DEVCODE_M8 0x77
#define DEVCODE_M644 0x74
static void sendchar(uint8_t data) static void sendchar(uint8_t data)
{ {
@ -68,15 +79,14 @@ static uint8_t recvchar(void)
return UDR0; return UDR0;
} }
static int uart_putchar(char c, FILE *stream) static void print_byte(uint8_t val)
{ {
if (c == '\n') uint8_t tmp = (val >> 4) & 0x0F;
uart_putchar('\r', stream); sendchar((tmp < 0x0A) ? ('0' + tmp) : ('a' - 0x0A + tmp));
sendchar(c);
return 0;
}
static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE); tmp = val & 0x0F;
sendchar((tmp < 0x0A) ? ('0' + tmp) : ('a' - 0x0A + tmp));
}
static uint8_t i2c_master_tx(uint8_t val) static uint8_t i2c_master_tx(uint8_t val)
{ {
@ -104,14 +114,14 @@ static uint8_t i2c_master_rx(uint8_t *val, uint8_t ack)
static void i2c_stop(void) static void i2c_stop(void)
{ {
PORTB &= ~LED_RT; PORTB |= LED_RT;
TWCR = (1<<TWINT) | (1<<TWSTO) | (1<<TWEN); TWCR = (1<<TWINT) | (1<<TWSTO) | (1<<TWEN);
} }
static void i2c_start_address(uint8_t addr) static void i2c_start_address(uint8_t addr)
{ {
while (1) { while (1) {
PORTB |= LED_RT; PORTB &= ~LED_RT;
TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN); TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
loop_until_bit_is_set(TWCR, TWINT); loop_until_bit_is_set(TWCR, TWINT);
@ -125,7 +135,7 @@ static void i2c_start_address(uint8_t addr)
} }
/* wait 100x 10ms */ /* wait 100x 10ms */
static uint8_t boot_timeout = 100; volatile static uint8_t boot_timeout = 100;
ISR(TIMER0_OVF_vect) ISR(TIMER0_OVF_vect)
{ {
@ -145,7 +155,9 @@ ISR(TIMER0_OVF_vect)
} }
static uint16_t address; static uint16_t address;
static uint8_t page_buf[256]; static uint16_t page_size;
static uint8_t page_buf[SPM_PAGESIZE];
static void eraseFlash(void) static void eraseFlash(void)
{ {
@ -237,6 +249,9 @@ static uint16_t readEEpromPage(uint16_t address, uint16_t size)
return address; return address;
} }
/* 0-2: signature, 3: pagesize, 4-5: flash size, 6-7: eeprom size */
static uint8_t chipinfo[8];
void cmd_loop(void) void cmd_loop(void)
{ {
uint8_t i2c_dev = 0; uint8_t i2c_dev = 0;
@ -258,14 +273,15 @@ void cmd_loop(void)
// write address // write address
} else if (val == 'A') { } else if (val == 'A') {
address = recvchar(); address = recvchar();
address = (address<<8) | recvchar(); address = (address << 8) | recvchar();
sendchar('\r'); sendchar('\r');
// Buffer load support // Buffer load support
} else if (val == 'b') { } else if (val == 'b') {
sendchar('Y'); sendchar('Y');
sendchar((sizeof(page_buf) >> 8) & 0xFF); page_size = (i2c_dev == 0) ? sizeof(page_buf) : chipinfo[3];
sendchar(sizeof(page_buf) & 0xFF); sendchar((page_size >> 8) & 0xFF);
sendchar(page_size & 0xFF);
// Start buffer load // Start buffer load
} else if (val == 'B') { } else if (val == 'B') {
@ -277,27 +293,17 @@ void cmd_loop(void)
size |= recvchar(); size |= recvchar();
val = recvchar(); val = recvchar();
for (cnt = 0; cnt < sizeof(page_buf); cnt++) for (cnt = 0; cnt < page_size; cnt++)
*tmp++ = (cnt < size) ? recvchar() : 0xFF; *tmp++ = (cnt < size) ? recvchar() : 0xFF;
if (i2c_dev != 0) { if (i2c_dev != 0) {
i2c_start_address(i2c_dev); i2c_start_address(i2c_dev);
if (val == 'F') { i2c_master_tx(CMD_WRITE_MEMORY);
i2c_master_tx(CMD_WRITE_FLASH); i2c_master_tx((val == 'F') ? MEMTYPE_FLASH : MEMTYPE_EEPROM);
// FIXME: Flashwriting is not working. see bl_master (which works)
} else {
i2c_master_tx(CMD_WRITE_EEPROM);
/* no page align, transfer only needed bytes */
cnt = size;
}
i2c_master_tx(address >> 8); i2c_master_tx(address >> 8);
i2c_master_tx(address & 0xFF); i2c_master_tx(address & 0xFF);
address += sizeof(page_buf);
i2c_master_tx(WRITE_COOKIE >> 8); address += page_size;
i2c_master_tx(WRITE_COOKIE & 0xFF);
tmp = page_buf; tmp = page_buf;
while (cnt--) while (cnt--)
@ -322,11 +328,8 @@ void cmd_loop(void)
if (i2c_dev != 0) { if (i2c_dev != 0) {
i2c_start_address(i2c_dev); i2c_start_address(i2c_dev);
if (val == 'F') i2c_master_tx(CMD_READ_MEMORY);
i2c_master_tx(CMD_READ_FLASH); i2c_master_tx((val == 'F') ? MEMTYPE_FLASH : MEMTYPE_EEPROM);
else
i2c_master_tx(CMD_READ_EEPROM);
i2c_master_tx(address >> 8); i2c_master_tx(address >> 8);
i2c_master_tx(address & 0xFF); i2c_master_tx(address & 0xFF);
@ -363,18 +366,11 @@ void cmd_loop(void)
} else if (val == 'P') { } else if (val == 'P') {
if (i2c_dev != 0) { if (i2c_dev != 0) {
i2c_start_address(i2c_dev); i2c_start_address(i2c_dev);
i2c_master_tx(CMD_BOOT_LOADER); i2c_master_tx(CMD_SWITCH_APPLICATION);
i2c_master_tx(BOOTTYPE_BOOTLOADER);
i2c_stop(); i2c_stop();
_delay_ms(10); _delay_ms(10);
i2c_start_address(i2c_dev);
i2c_master_tx(CMD_GET_SIGNATURE);
i2c_start_address(i2c_dev | 0x01);
i2c_master_rx(&val, 1);
i2c_master_rx(&val, 1);
i2c_master_rx(&val, 0);
i2c_stop();
} }
sendchar('\r'); sendchar('\r');
@ -382,7 +378,8 @@ void cmd_loop(void)
} else if (val == 'L') { } else if (val == 'L') {
if (i2c_dev != 0) { if (i2c_dev != 0) {
i2c_start_address(i2c_dev); i2c_start_address(i2c_dev);
i2c_master_tx(CMD_BOOT_APPLICATION); i2c_master_tx(CMD_SWITCH_APPLICATION);
i2c_master_tx(BOOTTYPE_APPLICATION);
i2c_stop(); i2c_stop();
} }
sendchar('\r'); sendchar('\r');
@ -393,7 +390,7 @@ void cmd_loop(void)
// Return device type // Return device type
} else if (val == 't') { } else if (val == 't') {
sendchar((i2c_dev == 0) ? DEVCODE_M644 : DEVCODE_M8); sendchar((i2c_dev == 0) ? OWN_DEVCODE : TWI_DEVCODE);
sendchar(0); sendchar(0);
// clear and set LED ignored // clear and set LED ignored
@ -424,14 +421,15 @@ void cmd_loop(void)
// Return Signature Bytes // Return Signature Bytes
} else if (val == 's') { } else if (val == 's') {
if (i2c_dev != 0) { if (i2c_dev != 0) {
sendchar(0x07); sendchar(chipinfo[2]);
sendchar(0x93); sendchar(chipinfo[1]);
sendchar(0x1e); sendchar(chipinfo[0]);
} else { } else {
sendchar(0x09); uint8_t sig[3] = OWN_SIGNATURE;
sendchar(0x96); sendchar(sig[2]);
sendchar(0x1e); sendchar(sig[1]);
sendchar(sig[0]);
} }
// set i2c target // set i2c target
@ -440,27 +438,20 @@ void cmd_loop(void)
sendchar(val); sendchar(val);
} else if (val >= '1' && val <= '4') { } else if (val >= '1' && val <= '4') {
i2c_dev = (val - '1' + 0x21) << 1; i2c_dev = (val - '0' + TWI_ADDRESS_BASE) << 1;
sendchar(val); sendchar(val);
sendchar('<');
// test props
} else if (val == 'l') {
i2c_start_address(i2c_dev); i2c_start_address(i2c_dev);
i2c_master_tx(CMD_SET_PWM); i2c_master_tx(CMD_SWITCH_APPLICATION);
i2c_master_tx(0x00); i2c_master_tx(BOOTTYPE_BOOTLOADER);
i2c_stop(); i2c_stop();
// test props for (val = 0; val < 10; val++)
} else if (val == 'k') { _delay_ms(10);
i2c_start_address(i2c_dev);
i2c_master_tx(CMD_SET_PWM);
i2c_master_tx(0x0f);
i2c_stop();
// get Info
} else if (val == 'I') {
i2c_start_address(i2c_dev); i2c_start_address(i2c_dev);
i2c_master_tx(CMD_GET_INFO); i2c_master_tx(CMD_READ_VERSION);
i2c_start_address(i2c_dev | 0x01); i2c_start_address(i2c_dev | 0x01);
uint8_t cnt; uint8_t cnt;
@ -471,6 +462,62 @@ void cmd_loop(void)
i2c_stop(); i2c_stop();
sendchar(',');
i2c_start_address(i2c_dev);
i2c_master_tx(CMD_READ_MEMORY);
i2c_master_tx(MEMTYPE_CHIPINFO);
i2c_master_tx(0x00);
i2c_master_tx(0x00);
i2c_start_address(i2c_dev | 0x01);
uint8_t i;
for (i = 0; i < sizeof(chipinfo); i++) {
uint8_t more = (i < (sizeof(chipinfo) -1));
i2c_master_rx(&chipinfo[i], more);
sendchar('0');
sendchar('x');
print_byte(chipinfo[i]);
sendchar(more ? ',' : '>');
}
i2c_stop();
// test props
} else if (val == 'k' || val == 'l') {
if (i2c_dev != 0) {
i2c_start_address(i2c_dev);
i2c_master_tx(0x00 + (val - 'k') * 0x10);
i2c_stop();
sendchar(val);
}
// start Application / get Version
} else if (val == 'I') {
if (i2c_dev != 0) {
i2c_start_address(i2c_dev);
i2c_master_tx(CMD_SWITCH_APPLICATION);
i2c_master_tx(BOOTTYPE_APPLICATION);
i2c_stop();
for (val = 0; val < 10; val++)
_delay_ms(10);
i2c_start_address(i2c_dev);
i2c_master_tx(CMD_READ_VERSION);
i2c_start_address(i2c_dev | 0x01);
sendchar('<');
uint8_t cnt;
for (cnt = 0; cnt < 16; cnt++) {
i2c_master_rx(&val, (cnt != 15));
sendchar(val);
}
sendchar('>');
i2c_stop();
}
/* ESC */ /* ESC */
} else if (val != 0x1b) { } else if (val != 0x1b) {
sendchar('?'); sendchar('?');
@ -478,12 +525,28 @@ void cmd_loop(void)
} }
} }
static void (*jump_to_app)(void) = 0x0000; static void (*jump_to_app)(void) __attribute__ ((noreturn)) = 0x0000;
/*
* For newer devices the watchdog timer remains active even after a
* system reset. So disable it as soon as possible.
* automagically called on startup
*/
#if defined (__AVR_ATmega88__) || defined (__AVR_ATmega168__)
void disable_wdt_timer(void) __attribute__((naked, section(".init3")));
void disable_wdt_timer(void)
{
MCUSR = 0;
WDTCSR = (1<<WDCE) | (1<<WDE);
WDTCSR = (0<<WDE);
}
#endif
int main(void) __attribute__ ((noreturn));
int main(void) int main(void)
{ {
DDRB = LED_GN | LED_RT; DDRB = LED_GN | LED_RT;
PORTB = LED_GN; PORTB = LED_GN | LED_RT;
/* move interrupt-vectors to bootloader */ /* move interrupt-vectors to bootloader */
MCUCR = (1<<IVCE); MCUCR = (1<<IVCE);
@ -497,8 +560,6 @@ int main(void)
UCSR0B = (1<<TXEN0) | (1<<RXEN0); UCSR0B = (1<<TXEN0) | (1<<RXEN0);
UCSR0C = (1<<UCSZ01) | (1<<UCSZ00); UCSR0C = (1<<UCSZ01) | (1<<UCSZ00);
stdout = &mystdout;
/* timer0: running with F_CPU/1024 */ /* timer0: running with F_CPU/1024 */
TCCR0B = (1<<CS02) | (1<<CS00); TCCR0B = (1<<CS02) | (1<<CS00);
@ -523,7 +584,11 @@ int main(void)
MCUCR = (1<<IVCE); MCUCR = (1<<IVCE);
MCUCR = (0<<IVSEL); MCUCR = (0<<IVSEL);
jump_to_app(); PORTB = LED_RT;
return 0; uint8_t i;
for (i = 0; i < 10; i++)
_delay_ms(10);
jump_to_app();
} }