PiDuino Library

setPwmPeriod(pin, microseconds)

Sets the PWM (Pulse Width Modulation) wave period in microseconds (us).

Parameters

pin - The GPIO pin number.

microseconds - PWM frequency (in us).
Available ranges are between 52631 (19 hz) and 26 (37500 hz).

Returns

None

Example

#include <Arduino.h>

int GPIO_PIN = 12; // GPIO12

void setup() {
	pinMode(GPIO_PIN, PWM_OUTPUT);
}

void loop() {
	// Set PWM to 10000 us (100 Hz)
	setPwmDutyCycle(GPIO_PIN, 10000); 
	delay(1000);
	// Set PWM to 1000 us (1 KHz)
	setPwmDutyCycle(GPIO_PIN, 1000); 
	delay(1000);
	// Set PWM to 100 us (10 kHz)
	setPwmDutyCycle(GPIO_PIN, 100); 
	delay(1000);
}

Notes

• The default PWM frequency is 490 Hz
• PWM_OUTPUT mode uses the internal PWM hardware of the BCM283x SoC.
  The available PWM pins are the followings: