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esp32 devkitc-1 驱动sg90舵机的问题
Posted: Thu Jul 14, 2022 6:25 am
by cqf123
开发环境：arduino
想用自带的LEDPWD来驱动sg90 发现没有反应
int freq = 50;
int channel = 7;
int resolution = 8;
const int led = 16;
int servo_max=180,servo_min=90;
int calculatePWM(int degree)
{
const float deadZone = 6.4;
const float max = 32;
if (degree < 0)
degree = 0;
if (degree > 180)
degree = 180;
return (int)(((max - deadZone) / 180) * degree + deadZone);
}
void setup()
{
Serial.begin(9600);
ledcSetup(channel, freq, resolution); // 设置通道
ledcAttachPin(led, channel); // 将通道与对应的引脚连接
}
void loop()
{
ledcWrite(channel, calculatePWM(90));
delay(1000);
ledcWrite(channel, calculatePWM(180));
delay(1000);
}
Re: esp32 devkitc-1 驱动sg90舵机的问题
Posted: Thu Jul 14, 2022 2:15 pm
by 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
#define LEDC_CHANNEL_0 0// use first channel of 16 channels (started from zero)
#define LEDC_TIMER_13_BIT 13// use 13 bit precission for LEDC timer
#define LEDC_BASE_FREQ 50// use 50 Hz as a LEDC base frequency
#define LED_PIN 14// fade LED PIN (replace with LED_BUILTIN constant for built-in LED)
int brightness = 700; // how bright the LED is
int fadeAmount = 1; // how many points to fade the LED by
void ledcAnalogWrite(uint8_t channel, uint32_t value, uint32_t valueMax = 8191) {// Arduino like analogWrite// value has to be between 0 and valueMax
uint32_t duty = (8191 / valueMax) * min(value, valueMax);// calculate duty, 8191 from 2 ^ 13 - 1
ledcWrite(channel, duty);// write duty to LEDC
}
void setup() {
ledcSetup(LEDC_CHANNEL_0, LEDC_BASE_FREQ, LEDC_TIMER_13_BIT);// Setup timer and attach timer to a led pin
ledcAttachPin(LED_PIN, LEDC_CHANNEL_0);
}
void loop() {
ledcAnalogWrite(LEDC_CHANNEL_0, brightness);// set the brightness on LEDC channel 0
brightness = brightness + fadeAmount;// change the brightness for next time through the loop:
if (brightness <= 700 || brightness >= 899) {// reverse the direction of the fading at the ends of the fade:
fadeAmount = -fadeAmount;
}
delay(100);// wait for 30 milliseconds to see the dimming effect
}
Re: esp32 devkitc-1 驱动sg90舵机的问题
Posted: Sat Jul 16, 2022 11:23 am
by cqf123
感谢 还是不行
Re: esp32 devkitc-1 驱动sg90舵机的问题
Posted: Thu Jul 21, 2022 6:43 am
by Li Junru
可以试一下：ServoESP32 这个arduion库