commit
13ea7e7daa
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/etc/avrdude.conf
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/* I2C Echo Example */
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#include "../I2CSlave/I2CSlave.h"
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#define I2C_ADDR 0x20
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volatile uint8_t data;
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volatile uint8_t final;
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void I2C_received(uint8_t received_data)
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{
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data = received_data;
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}
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void I2C_requested()
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{
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I2C_transmitByte(data);
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}
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void I2C_challenge() {
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I2C_transmitByte(data*3);
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}
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void setup()
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{
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// set received/requested callbacks
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I2C_setCallbacks(I2C_received, I2C_requested);
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// init I2C
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I2C_init(I2C_ADDR);
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// init output gpio
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DDRB = 0b00000001;
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}
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int main()
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{
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setup();
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// Main program loop
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while(1) {
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if(data != 4) {
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I2C_challenge();
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}
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else {
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//PORTB |= 1<<1;
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data = 2;
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I2C_requested();
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}
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}
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}
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@ -0,0 +1,225 @@
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# Hey Emacs, this is a -*- makefile -*-
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# AVR-GCC Makefile template, derived from the WinAVR template (which
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# is public domain), believed to be neutral to any flavor of "make"
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# (GNU make, BSD make, SysV make)
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MCU = atmega328p
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FORMAT = ihex
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TARGET = main
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SRC = $(TARGET).c \
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I2CSlave.c
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ASRC =
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OPT = s
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# Name of this Makefile (used for "make depend").
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MAKEFILE = Makefile
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# Debugging format.
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# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
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# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
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DEBUG = stabs
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# Compiler flag to set the C Standard level.
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# c89 - "ANSI" C
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# gnu89 - c89 plus GCC extensions
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# c99 - ISO C99 standard (not yet fully implemented)
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# gnu99 - c99 plus GCC extensions
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CSTANDARD = -std=gnu99
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# Place -D or -U options here
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CDEFS = -DF_CPU=8000000
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# Place -I options here
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CINCS =
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CDEBUG = -g$(DEBUG)
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CWARN = -Wall -Wstrict-prototypes
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CTUNING = -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
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# CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
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CFLAGS = $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CWARN) $(CSTANDARD) $(CEXTRA)
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#ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
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#Additional libraries.
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# Minimalistic printf version
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PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
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# Floating point printf version (requires MATH_LIB = -lm below)
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PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt
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PRINTF_LIB =
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# Minimalistic scanf version
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SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
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# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
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SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt
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SCANF_LIB =
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MATH_LIB = -lm
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# External memory options
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# used for variables (.data/.bss) and heap (malloc()).
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# EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# only used for heap (malloc()).
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# EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff
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EXTMEMOPTS =
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# LDMAP = $(LDFLAGS) -Wl,-Map=$(TARGET).map,--cref
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LDFLAGS = $(EXTMEMOPTS) $(LDMAP) $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
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|
# Programming support using avrdude. Settings and variables.
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AVRDUDE_PROGRAMMER = usbasp
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# AVRDUDE_PORT = /dev/term/a
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AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex -U lfuse:w:0xE2:m
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# AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
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# Uncomment the following if you want avrdude's erase cycle counter.
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|
# Note that this counter needs to be initialized first using -Yn,
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# see avrdude manual.
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# AVRDUDE_ERASE_COUNTER = -y
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|
# Uncomment the following if you do /not/ wish a verification to be
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# performed after programming the device.
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# AVRDUDE_NO_VERIFY = -V
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|
# Increase verbosity level. Please use this when submitting bug
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|
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
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|
# to submit bug reports.
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# AVRDUDE_VERBOSE = -v -v
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AVRDUDE_BASIC = -p $(MCU) -c $(AVRDUDE_PROGRAMMER)
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# -P $(AVRDUDE_PORT)
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AVRDUDE_FLAGS = $(AVRDUDE_BASIC) $(AVRDUDE_NO_VERIFY) $(AVRDUDE_VERBOSE) $(AVRDUDE_ERASE_COUNTER)
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CC = avr-gcc
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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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|
NM = avr-nm
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|
AVRDUDE = avrdude
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REMOVE = rm -f
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MV = mv -f
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|
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|
# Define all object files.
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OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
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# Define all listing files.
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LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)
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# Combine all necessary flags and optional flags.
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# Add target processor to flags.
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ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
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ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
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# Default target.
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all: build
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build: elf hex eep
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elf: $(TARGET).elf
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|
hex: $(TARGET).hex
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eep: $(TARGET).eep
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lss: $(TARGET).lss
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sym: $(TARGET).sym
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|
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|
# Program the device.
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program: $(TARGET).hex $(TARGET).eep
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|
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
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|
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|
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|
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|
# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
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|
COFFCONVERT=$(OBJCOPY) --debugging \
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|
--change-section-address .data-0x800000 \
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|
--change-section-address .bss-0x800000 \
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|
--change-section-address .noinit-0x800000 \
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|
--change-section-address .eeprom-0x810000
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|
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|
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|
coff: $(TARGET).elf
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|
$(COFFCONVERT) -O coff-avr $(TARGET).elf $(TARGET).cof
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|
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|
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|
extcoff: $(TARGET).elf
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|
$(COFFCONVERT) -O coff-ext-avr $(TARGET).elf $(TARGET).cof
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|
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|
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|
.SUFFIXES: .elf .hex .eep .lss .sym
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|
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|
.elf.hex:
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|
$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
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|
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||||||
|
.elf.eep:
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|
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
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|
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
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|
|
||||||
|
# Create extended listing file from ELF output file.
|
||||||
|
.elf.lss:
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||||||
|
$(OBJDUMP) -h -S $< > $@
|
||||||
|
|
||||||
|
# Create a symbol table from ELF output file.
|
||||||
|
.elf.sym:
|
||||||
|
$(NM) -n $< > $@
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
# Link: create ELF output file from object files.
|
||||||
|
$(TARGET).elf: $(OBJ)
|
||||||
|
$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
|
||||||
|
|
||||||
|
|
||||||
|
# Compile: create object files from C source files.
|
||||||
|
.c.o:
|
||||||
|
$(CC) -c $(ALL_CFLAGS) $< -o $@
|
||||||
|
|
||||||
|
|
||||||
|
# Compile: create assembler files from C source files.
|
||||||
|
.c.s:
|
||||||
|
$(CC) -S $(ALL_CFLAGS) $< -o $@
|
||||||
|
|
||||||
|
|
||||||
|
# Assemble: create object files from assembler source files.
|
||||||
|
.S.o:
|
||||||
|
$(CC) -c $(ALL_ASFLAGS) $< -o $@
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
# Target: clean project.
|
||||||
|
clean:
|
||||||
|
$(REMOVE) $(TARGET).hex $(TARGET).eep $(TARGET).cof $(TARGET).elf \
|
||||||
|
$(TARGET).map $(TARGET).sym $(TARGET).lss \
|
||||||
|
$(OBJ) $(LST) $(SRC:.c=.s) $(SRC:.c=.d)
|
||||||
|
|
||||||
|
depend:
|
||||||
|
if grep '^# DO NOT DELETE' $(MAKEFILE) >/dev/null; \
|
||||||
|
then \
|
||||||
|
sed -e '/^# DO NOT DELETE/,$$d' $(MAKEFILE) > \
|
||||||
|
$(MAKEFILE).$$$$ && \
|
||||||
|
$(MV) $(MAKEFILE).$$$$ $(MAKEFILE); \
|
||||||
|
fi
|
||||||
|
echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' \
|
||||||
|
>> $(MAKEFILE); \
|
||||||
|
$(CC) -M -mmcu=$(MCU) $(CDEFS) $(CINCS) $(SRC) $(ASRC) >> $(MAKEFILE)
|
||||||
|
|
||||||
|
.PHONY: all build elf hex eep lss sym program coff extcoff clean depend
|
||||||
Loading…
Reference in new issue