35 lines
873 B
C++
35 lines
873 B
C++
#include <Arduino.h>
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#include <esp32-hal-dac.h>//DAC功能引用该库，可以不进行#include<>引用
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//查看源码后得到，DAC引脚只能是这两个引脚
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#define LED1 25
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#define LED2 26
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void setup(){
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//长时候发现，DAC的IO口也可以不进行初始化
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pinMode(LED1,OUTPUT);
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pinMode(LED2,OUTPUT);
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Serial.begin(115200);
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}
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void loop()
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{
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// 逐渐变亮
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for (int dutyCycle = 199; dutyCycle <= 255; dutyCycle = dutyCycle + 1)
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{
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dacWrite(LED1, dutyCycle); // 输出DAC
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dacWrite(LED2, 255 - dutyCycle); // 输出DAC
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Serial.printf("++++%d\n",dutyCycle);
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delay(20);
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}
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// 逐渐变暗
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for (int dutyCycle = 255; dutyCycle >= 199; dutyCycle = dutyCycle - 1)
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{
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dacWrite(LED1, dutyCycle); // 输出DAC
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dacWrite(LED2, 255 - dutyCycle); // 输出DAC
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Serial.printf("----%d\n",dutyCycle);
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delay(20);
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}
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}
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