repo for instructions and code to produce a audio (wav) player from a simple sd card and an attiny(85) avr chip
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#
# Makefile template for ATtiny85
# Derived from AVR Crosspack template
#
DEVICE = attiny85 # See avr-help for all possible devices
CLOCK = 8000000 # 1Mhz
PROGRAMMER = -c avrisp -P /dev/cu.usbmodem1421 # For using Adafruit USBtiny
OBJECTS = main.o # Add more objects for each .c file here
FUSES = -U lfuse:w:0x62:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m # settings as taken from http://www.engbedded.com/fusecalc/
#put avrdude.conf from /Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf in the folder of the code you want to compile!
AVRDUDE = /Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C avrdude.conf $(PROGRAMMER) -p $(DEVICE)
COMPILE = /Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE)
# symbolic targets:
all: main.hex
.c.o:
$(COMPILE) -c $< -o $@
.S.o:
$(COMPILE) -x assembler-with-cpp -c $< -o $@
.c.s:
$(COMPILE) -S $< -o $@
flash: all
$(AVRDUDE) -U flash:w:main.hex:i
fuse:
$(AVRDUDE) $(FUSES)
install: flash fuse
# if you use a bootloader, change the command below appropriately:
load: all
bootloadHID main.hex
clean:
rm -f main.hex main.elf $(OBJECTS)
# file targets:
main.elf: $(OBJECTS)
$(COMPILE) -o main.elf $(OBJECTS)
main.hex: main.elf
rm -f main.hex
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-objcopy -j .text -j .data -O ihex main.elf main.hex
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-size --format=avr --mcu=$(DEVICE) main.elf
# If you have an EEPROM section, you must also create a hex file for the
# EEPROM and add it to the "flash" target.
# Targets for code debugging and analysis:
disasm: main.elf
avr-objdump -d main.elf
cpp:
$(COMPILE) -E main.c