Connect the ADC's of ATTINY13 with a FPGA (design example)
Connection between AVR and FPGA uses a unidirectional custom protocol (based on I2C) :
| start condition | #ADC (2bit) | ADC value (10bit) | stop condition |
|---|
AVR sends constantly a sequence for the three ADC (adc1 adc2 adc3 adc1 ...).
Three potentiometers enable to adjust three leds intensity using pwm feature (leds are on the FPGA board)
