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Damien George
authored and
Paul Sokolovsky
committed
PWM implementation uses a timer and interrupts (FRC1), taken from
Espressif's/NodeMCU's implementation and adapted for our use.
8 channels are supported, on pins 0, 2, 4, 5, 12, 13, 14, 15.
Usage:
import machine
pwm0 = machine.PWM(machine.Pin(0))
pwm0.freq(1000)
pwm0.duty(500)
Frequency is shared (ie the same) for all channels. Frequency is
between 1 and 1000. Duty is between 0 and 1023. esppwm.h 419 B
#ifndef __ESPPWM_H__
#define __ESPPWM_H__
#include <stdbool.h>
#include <stdint.h>
void pwm_init(void);
void pwm_start(void);
void pwm_set_duty(uint16_t duty, uint8_t channel);
uint16_t pwm_get_duty(uint8_t channel);
void pwm_set_freq(uint16_t freq, uint8_t channel);
uint16_t pwm_get_freq(uint8_t channel);
int pwm_add(uint8_t pin_id, uint32_t pin_mux, uint32_t pin_func);
bool pwm_delete(uint8_t channel);
#endif