changing the PWM frequency

[EhsanMasoumi]

Hi,

My motor is too load when I drive it by Arduino Due PWM waveform. The issue is that the default PWM frequency of Ardunio Due is 1000. I am wondering how can I increase that? I used this code in my sketch to make the interrupts but did not work.

void setupTimerPWM(){

PMC->PMC_PCER1 |= PMC_PCER1_PID34; // TC7 power ON - Timer Counter 2 channel 1 IS TC7 - See page 38

PIOC->PIO_PDR |= PIO_PDR_P28; // The pin is no more driven by GPIO
PIOC->PIO_ABSR |= PIO_PC28B_TIOA7; // Periperal type B - See page 859

TC2->TC_CHANNEL[1].TC_CMR = TC_CMR_TCCLKS_TIMER_CLOCK1 // MCK/2, clk on rising edge
| TC_CMR_WAVE // Waveform mode
| TC_CMR_WAVSEL_UP_RC // UP mode with automatic trigger on RC Compare
| TC_CMR_ACPA_CLEAR // Clear TIOA7 on RA compare match -- See page 883
| TC_CMR_ACPC_SET; // Set TIOA7 on RC compare match

TC2->TC_CHANNEL[1].TC_RC = pwmRange; //<********************* Frequency = (Mck/2)/TC_RC Hz = 20 KHz
TC2->TC_CHANNEL[1].TC_RA = 1; //<******************** Duty cycle = (TC_RA/TC_RC) * 100 %

TC2->TC_CHANNEL[1].TC_IER = TC_IER_CPCS; // Interrupt on RC compare match
NVIC_EnableIRQ(TC7_IRQn);

TC2->TC_CHANNEL[1].TC_CCR = TC_CCR_SWTRG | TC_CCR_CLKEN;// Software trigger TC7 counter and enable

}

// interrupt handler
void TC7_Handler() {
static uint32_t Count;
TC2->TC_CHANNEL[1].TC_SR;

}