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r65emu/sound_pwm.cpp
2018-11-09 07:25:13 +00:00

63 lines
1.3 KiB
C++

#include <Arduino.h>
#include "sound_pwm.h"
#include "hardware.h"
#if defined(ESP32)
#include <driver/ledc.h>
#define CHANNEL LEDC_CHANNEL_0
#define TIMER LEDC_TIMER_0
#define SPEED_MODE LEDC_HIGH_SPEED_MODE
void PWM::begin(unsigned gpio) {
ledc_timer_config_t timer_conf;
timer_conf.duty_resolution = LEDC_TIMER_10_BIT;
timer_conf.freq_hz = 440;
timer_conf.speed_mode = SPEED_MODE;
timer_conf.timer_num = TIMER;
ESP_ERROR_CHECK(::ledc_timer_config(&timer_conf));
ledc_channel_config_t ledc_conf;
ledc_conf.channel = CHANNEL;
ledc_conf.duty = 0;
ledc_conf.gpio_num = gpio;
ledc_conf.intr_type = LEDC_INTR_DISABLE;
ledc_conf.speed_mode = SPEED_MODE;
ledc_conf.timer_sel = TIMER;
ESP_ERROR_CHECK(::ledc_channel_config(&ledc_conf));
}
void PWM::set_duty(unsigned duty) {
ESP_ERROR_CHECK(::ledc_set_duty(SPEED_MODE, CHANNEL, duty));
ESP_ERROR_CHECK(::ledc_update_duty(SPEED_MODE, CHANNEL));
}
void PWM::stop() {
set_duty(0);
}
void PWM::set_freq(unsigned freq) {
ESP_ERROR_CHECK(::ledc_set_freq(SPEED_MODE, TIMER, freq));
}
#else
static unsigned pin;
void PWM::begin(unsigned gpio) {
pin = gpio;
analogWriteRange(PWM_TOP);
}
void PWM::set_duty(unsigned duty) {
analogWrite(pin, duty);
}
void PWM::stop() {
analogWrite(pin, 0);
}
void PWM::set_freq(unsigned freq) {
analogWriteFreq(freq);
}
#endif