generates two 50 or 67.5 hz sine waves one of them being shifted by 90 degrees. as this runs on avr attiny45, the wave is generated as a pwm signal, thus it needs to be filtered. given a 16MHz external resonator the pwm frequency will be 62.5KHz.
check out src/ffso.c for an IO map.
- build:
make clean && make all - flash:
make program - fuses:
-U lfuse:w:0xef:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m