AVRPWM1Setup Function to Setup OC1A or OC1B pin for required PWM mode waveform_mode: integer, from 0 to 2 output_mode: integer, from 0 to 1 (or 2) depending on the waveform_mode output_pin: 0 (for OC1A) or 1 for (OC1B) Every Micro controller has PWM pins which can generate varying voltages from 0V-5V.This function helps to use OC1A or OC1B pin to produces required output waveform by setting the waveform mode and otput mode. waveform_mode can take values- 0 -> for Phase correct PWM Mode 1 -> for Fast PWM Mode 2 -> for CTC Mode output_mode can take values- For Phase correct PWM Mode: 0 for Clear OC1A or OC1B on compare match when up-counting. Set OC1A or OC1B on compare match when down-counting. 1 for Set OC1A or OC1B on compare match when up-counting. Clear OC1A or OC1B on compare match when down-counting. For Fast PWM Mode: 0 for non-inverted output i.e Clear OC1A or OC1B on compare match, set OC1A or OC1B at BOTTOM. 1 for inverted output i.e Set OC1A or OC1B on compare match, clear OC1A or OC1B at BOTTOM. For CTC Mode: 0 to Clear OC1A or OC1B on compare match 1 to Set OC1A or OC1B on compare match 2 to toggle OC1A or OC1B on compare match This is curretly dummy function. It provides no functionality but is required for providing support for generating C code for AVR. Example AVRPWM1Setup(2,0,0); //This function will select CTC mode and will clear OC1A or OC1B on compare match.Also as defined the output will be produced at 0C1A pin. AVRPWM1SetDuty Ashish Kamble