pwm

Pulse Width Modulation

• Clock
• Pre-scalar
• Duty cycle (in percentage)
• Period (the total width of high and low, in ms)
• When TCNT (time counter) matches OCRA, actions are triggered

void doNextOC() {
    unsigned short *pTCNT = ...
    unsigned short *pOCRA = ...
    *pOCRA += byHigh ? 2800 : 1200;
    byHigh = !byHigh;
}