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esp32 led pwm

Talented Tortoise answered on January 14, 2024 Popularity 5/10 Helpfulness 1/10

answer esp32 led pwm

esp32 led pwm

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// welcome to lingshunlab.com

const int LEDPin = 2;  /* GPIO16 */

int dutyCycle;
/* Setting PWM Properties */
const int PWMFreq = 5000; /* 5 KHz */
const int PWMChannel = 0;
const int PWMResolution = 10;
const int MAX_DUTY_CYCLE = (int)(pow(2, PWMResolution) - 1);

void setup()
{  
  // 配置PWM通道，频率，分辨率
  ledcSetup(PWMChannel, PWMFreq, PWMResolution);
  // 把配置好的PWM通道，分配引脚
  ledcAttachPin(LEDPin, PWMChannel);
}

void loop()
{
  // 用PWM增加LED亮度
  for(dutyCycle = 0; dutyCycle <= MAX_DUTY_CYCLE; dutyCycle++)
  {
    ledcWrite(PWMChannel, dutyCycle);
    delay(3);
  }
  // 用PWM降低LED亮度
  for(dutyCycle = MAX_DUTY_CYCLE; dutyCycle >= 0; dutyCycle--)
  {
    ledcWrite(PWMChannel, dutyCycle);
    delay(3);
  }
}

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Tags: esp32 led pwm whatever

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Contributed on Jan 14 2024

Talented Tortoise

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