initial commit
This commit is contained in:
commit
b47cfa680d
7
.gitignore
vendored
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7
.gitignore
vendored
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@ -0,0 +1,7 @@
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*.o
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*.elf
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*.bin
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*.hex
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*.lst
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*.lss
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*.map
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48
Makefile
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48
Makefile
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@ -0,0 +1,48 @@
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CC := avr-gcc
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LD := avr-ld
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OBJCOPY := avr-objcopy
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OBJDUMP := avr-objdump
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SIZE := avr-size
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TARGET = e2promprog
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SOURCE = $(wildcard *.c)
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MCU=attiny2313
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AVRDUDE_MCU=attiny2313
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AVRDUDE_FUSES=lfuse:w:0xe4:m hfuse:w:0xdf:m efuse:w:0xff:m
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AVRDUDE_PROG := -c avr910 -b 115200 -P /dev/ispprog
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#AVRDUDE_PROG := -c dragon_isp -P usb
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# ---------------------------------------------------------------------------
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CFLAGS = -pipe -g -Os -mmcu=$(MCU) -Wall
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CFLAGS += -fdata-sections -ffunction-sections
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CFLAGS += -Wa,-adhlns=$(*F).lst
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LDFLAGS = -Wl,-Map,$(@:.elf=.map),--cref
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LDFLAGS += -Wl,--relax,--gc-sections
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# ---------------------------------------------------------------------------
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$(TARGET): $(TARGET).elf
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@$(SIZE) -B -x --mcu=$(MCU) $<
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$(TARGET).elf: $(SOURCE:.c=.o)
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@echo " Linking file: $@"
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@$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ 2> /dev/null
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@$(OBJDUMP) -h -S $@ > $(@:.elf=.lss)
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@$(OBJCOPY) -j .text -j .data -O ihex $@ $(@:.elf=.hex)
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@$(OBJCOPY) -j .text -j .data -O binary $@ $(@:.elf=.bin)
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%.o: %.c $(MAKEFILE_LIST)
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@echo " Building file: $<"
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@$(CC) $(CFLAGS) -o $@ -c $<
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clean:
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rm -rf $(SOURCE:.c=.o) $(SOURCE:.c=.lst) $(addprefix $(TARGET), .elf .map .lss .hex .bin)
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install: $(TARGET).elf
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avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) -U flash:w:$(<:.elf=.hex)
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fuses:
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avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) $(patsubst %,-U %, $(AVRDUDE_FUSES))
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387
main.c
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387
main.c
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@ -0,0 +1,387 @@
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/***************************************************************************
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* Copyright (C) 02/2017 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License, *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <avr/io.h>
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#define F_CPU 8000000
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#include <util/delay.h>
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#define USE_HEX 0
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/*
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* attiny2313
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* lfuse: 0xe4 (int rc osc, max startup time)
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* hfuse: 0xdf (no BOD)
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* efuse: 0xff (no self programming)
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*
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* PA0 -> HC590 /MRC (Counter Reset)
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* PB0:7 <-> D0:7
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* PD0 <- RXD
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* PD1 -> TXD
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* PD2 -> HC590 CPC (Counter Clock)
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* PD3 -> HC590 CPR (Register Clock)
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* PD4 -> EEPROM /CS
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* PD5 -> EEPROM /WR
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* PD6 -> EEPROM /OE
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*/
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#define nCNTRES PORTA0
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#define RXD PORTD0
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#define TXD PORTD1
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#define CNTCLK PORTD2
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#define REGCLK PORTD3
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#define nCHIPSELECT PORTD4
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#define nWRITE PORTD5
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#define nREAD PORTD6
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#define PAGE_SIZE 64
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#define BAUDRATE 115200
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#define UART_CALC_BAUDRATE(baudRate) (((uint32_t)F_CPU) / (((uint32_t)baudRate)*16) -1)
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#define NOP asm volatile ("nop")
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static uint16_t g_address;
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/* *************************************************************************
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* send one byte to UART
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* ************************************************************************* */
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static void ser_send(uint8_t data)
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{
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loop_until_bit_is_set(UCSRA, UDRIE);
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UDR = data;
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} /* ser_send */
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/* *************************************************************************
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* receive one byte from UART
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* ************************************************************************* */
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static uint8_t ser_recv(void)
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{
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loop_until_bit_is_set(UCSRA, RXC);
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return UDR;
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} /* ser_recv */
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#if (USE_HEX)
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/* *************************************************************************
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*
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* ************************************************************************* */
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static void ser_send_hexnibble(uint8_t value)
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{
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value += (value < 0x0A) ? '0' : ('A' - 0x0A);
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ser_send(value);
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} /* ser_send_hexnibble */
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/* *************************************************************************
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*
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* ************************************************************************* */
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static void ser_send_hex(uint8_t value)
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{
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ser_send_hexnibble(value >> 4);
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ser_send_hexnibble(value & 0x0F);
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} /* ser_send_hex */
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/* *************************************************************************
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*
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* ************************************************************************* */
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static uint8_t ascii2hexnibble(uint8_t value)
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{
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if (value >= '0' && value <= '9')
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{
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return (value - '0');
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}
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else
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{
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value &= ~(0x20);
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if (value >= 'A' && value <= 'F')
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{
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return (value - 'A' + 0x0A);
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}
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}
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return 0;
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} /* ascii2hexnibble */
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/* *************************************************************************
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*
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* ************************************************************************* */
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static uint8_t ser_recv_hex(void)
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{
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uint8_t result;
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result = ascii2hexnibble(ser_recv()) << 4;
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result |= ascii2hexnibble(ser_recv());
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return result;
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} /* ser_recv_hex */
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#define ser_send_comm(x) ser_send_hex(x)
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#define ser_recv_comm() ser_recv_hex()
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#else
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#define ser_send_comm(x) ser_send(x)
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#define ser_recv_comm() ser_recv()
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#endif /* (USE_HEX) */
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/* *************************************************************************
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*
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* ************************************************************************* */
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static void address_clear(void)
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{
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/* reset address counter */
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PORTA &= ~(1<<nCNTRES);
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NOP;
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PORTA |= (1<<nCNTRES);
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/* clock address into register */
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PORTD |= (1<<REGCLK);
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NOP;
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PORTD &= ~(1<<REGCLK);
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g_address = 0;
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} /* address_clear */
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/* *************************************************************************
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* set address counter to value
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* ************************************************************************* */
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static void address_set(void)
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{
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uint16_t count;
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uint16_t address;
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address = ser_recv_comm() << 8;
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address |= ser_recv_comm();
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/* address already higher then target */
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if (g_address > address)
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{
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/* reset address counter */
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PORTA &= ~(1<<nCNTRES);
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NOP;
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PORTA |= (1<<nCNTRES);
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count = address;
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}
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else
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{
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count = (address - g_address);
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}
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/* increase address counter */
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while (count--)
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{
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PORTD |= (1<<CNTCLK);
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NOP;
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PORTD &= ~(1<<CNTCLK);
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}
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/* clock address into register */
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PORTD |= (1<<REGCLK);
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NOP;
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PORTD &= ~(1<<REGCLK);
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g_address = address;
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// ser_send_hex(address >> 8);
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// ser_send_hex(address & 0xFF);
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} /* address_set */
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/* *************************************************************************
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* increase address by one
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* ************************************************************************* */
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static void address_inc(void)
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{
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/* increase address counter */
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PORTD |= (1<<CNTCLK);
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NOP;
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PORTD &= ~(1<<CNTCLK);
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/* clock address into register */
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PORTD |= (1<<REGCLK);
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NOP;
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PORTD &= ~(1<<REGCLK);
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g_address++;
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} /* address_inc */
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/* *************************************************************************
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* read data from eeprom
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* ************************************************************************* */
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static void data_read(void)
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{
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uint8_t i;
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uint8_t data;
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uint8_t count;
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count = ser_recv_comm();
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DDRB = 0x00;
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PORTB = 0x00;
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for (i = 0; i < count; i++)
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{
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PORTD &= ~((1<<nCHIPSELECT) | (1<<nREAD));
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NOP;
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data = PINB;
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PORTD |= (1<<nCHIPSELECT) | (1<<nREAD);
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address_inc();
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ser_send_comm(data);
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}
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} /* data_read */
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/* *************************************************************************
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*
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* ************************************************************************* */
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static void data_poll(uint8_t value)
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{
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uint16_t retry = 2000;
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uint8_t data;
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DDRB = 0x00;
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PORTB = 0x00;
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do {
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PORTD &= ~((1<<nCHIPSELECT) | (1<<nREAD));
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NOP;
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data = PINB;
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PORTD |= (1<<nCHIPSELECT) | (1<<nREAD);
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} while (retry-- && (data != value));
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} /* data_poll */
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/* *************************************************************************
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* read data to eeprom
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* ************************************************************************* */
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static void data_write(void)
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{
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static uint8_t buffer[PAGE_SIZE];
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uint8_t i;
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uint8_t count;
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count = ser_recv_comm();
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if (count > PAGE_SIZE)
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{
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count = PAGE_SIZE;
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}
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for (i = 0; i < count; i++)
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{
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buffer[i] = ser_recv_comm();
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}
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DDRB = 0xFF;
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for (i = 0; i < count; i++)
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{
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PORTB = buffer[i];
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PORTD &= ~((1<<nCHIPSELECT) | (1<<nWRITE));
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NOP;
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PORTD |= (1<<nCHIPSELECT) | (1<<nWRITE);
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/* last address of page -> start polling */
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if ((g_address & (sizeof(buffer) -1)) == (sizeof(buffer) -1))
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{
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data_poll(buffer[i]);
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DDRB = 0xFF;
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}
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address_inc();
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}
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DDRB = 0x00;
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PORTB = 0x00;
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} /* data_write */
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/* *************************************************************************
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*
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* ************************************************************************* */
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int main(void) __attribute__ ((noreturn));
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int main(void)
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{
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PORTA = (1<<nCNTRES);
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DDRA = (1<<nCNTRES);
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PORTB = 0x00;
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DDRB = 0x00;
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PORTD = (1<<RXD) | (1<<TXD) | (1<<nCHIPSELECT) | (1<<nWRITE) | (1<<nREAD);
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DDRD = ~(1<<RXD);
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/* increase rc osc frequency to reach 115200 baud */
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OSCCAL = 0xCC;
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/* enable UART 8n1 */
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UBRRH = (UART_CALC_BAUDRATE(BAUDRATE)>>8) & 0xFF;
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UBRRL = (UART_CALC_BAUDRATE(BAUDRATE) & 0xFF);
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UCSRC = (1<<UCSZ1) | (1<<UCSZ0);
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UCSRB = (1<<RXEN) | (1<<TXEN);
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address_clear();
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while (1)
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{
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switch (ser_recv())
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{
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case 'a':
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address_set();
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ser_send('\r');
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ser_send('\n');
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break;
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case 'b':
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ser_send_comm(PAGE_SIZE);
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ser_send('\r');
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ser_send('\n');
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break;
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case 'r':
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data_read();
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ser_send('\r');
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ser_send('\n');
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break;
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case 'w':
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data_write();
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ser_send('\r');
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ser_send('\n');
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break;
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default:
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ser_send('?');
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ser_send('\r');
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ser_send('\n');
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break;
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}
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}
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} /* main */
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