esp32 devkitc-1 驱动sg90舵机的问题

[cqf123]

开发环境：arduino
想用自带的LEDPWD来驱动sg90 发现没有反应

Code: [Select all] [Expand/Collapse]

1. int freq = 50;    
2. int channel = 7;  
3. int resolution = 8;
4. const int led = 16;
5.  
6. int servo_max=180,servo_min=90;
7.  
8. int calculatePWM(int degree)
9. {
10.   const float deadZone = 6.4;
11.   const float max = 32;
12.   if (degree < 0)
13.     degree = 0;
14.   if (degree > 180)
15.     degree = 180;
16.   return (int)(((max - deadZone) / 180) * degree + deadZone);
17. }
18.  
19. void setup()    
20. {  
21.   Serial.begin(9600);  
22.   ledcSetup(channel, freq, resolution); // 设置通道
23.   ledcAttachPin(led, channel);          // 将通道与对应的引脚连接
24. }
25.  
26. void loop()
27. {  
28.   ledcWrite(channel, calculatePWM(90));
29.   delay(1000);
30.   ledcWrite(channel, calculatePWM(180));
31.   delay(1000);
32. }

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[HF CHENG]

巧啊，我昨天也尝试相同的方法驱动舵机，可能你的占空比设置的不太正确，可以试一下我改的示例程序，看看有没有动起来

Code: [Select all] [Expand/Collapse]

1. #define LEDC_CHANNEL_0     0// use first channel of 16 channels (started from zero)
2. #define LEDC_TIMER_13_BIT  13// use 13 bit precission for LEDC timer
3. #define LEDC_BASE_FREQ     50// use 50 Hz as a LEDC base frequency
4. #define LED_PIN            14// fade LED PIN (replace with LED_BUILTIN constant for built-in LED)
5. int brightness = 700;    // how bright the LED is
6. int fadeAmount = 1;    // how many points to fade the LED by
7.  
8. void ledcAnalogWrite(uint8_t channel, uint32_t value, uint32_t valueMax = 8191) {// Arduino like analogWrite// value has to be between 0 and valueMax
9.   uint32_t duty = (8191 / valueMax) * min(value, valueMax);// calculate duty, 8191 from 2 ^ 13 - 1
10.   ledcWrite(channel, duty);// write duty to LEDC
11. }
12.  
13. void setup() {
14.   ledcSetup(LEDC_CHANNEL_0, LEDC_BASE_FREQ, LEDC_TIMER_13_BIT);// Setup timer and attach timer to a led pin  
15.   ledcAttachPin(LED_PIN, LEDC_CHANNEL_0);
16. }
17.  
18. void loop() {
19.   ledcAnalogWrite(LEDC_CHANNEL_0, brightness);// set the brightness on LEDC channel 0  
20.   brightness = brightness + fadeAmount;// change the brightness for next time through the loop:  
21.   if (brightness <= 700 || brightness >= 899) {// reverse the direction of the fading at the ends of the fade:
22.     fadeAmount = -fadeAmount;
23.   }
24.   delay(100);// wait for 30 milliseconds to see the dimming effect
25. }

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[cqf123]

感谢 还是不行

[Li Junru]

可以试一下：ServoESP32 这个arduion库