PWM

PWM用于产生模拟信号驱动舵机或蜂鸣器

ledcSetup()

函数原型:

void ledcSetup(uint8_t channel, double freq, uint8_t resolution_bits)

功能:设置PWM通道,频率和分辨率。

ledcAttachPin()

函数原型:

void ledcAttachPin(uint8_t pin, uint8_t channel)

功能:将 LEDC 通道绑定到指定 IO 口上以实现输出

ledWrite()

函数原型:

void ledcWrite(uint8_t channel, uint32_t duty)

功能:向channel通道写入duty%占空比。

例程:

#include <M5StickC.h>
int freq = 1800;
int channel = 0;
int resolution_bits = 8;
int buzzer = 2;

void setup() {
  M5.begin();
  ledcSetup(channel, freq, resolution_bits);
  ledcAttachPin(buzzer, channel);
}
void loop() {
    ledcWrite(channel, 128);
    delay(1000);
    ledcWrite(channel, 0);
    delay(1000);
}
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