如何在 STM32 上使用 LECD PWM 生成 sin 和 cos 波

#include <Arduino.h>
#include <driver/ledc.h>

void setup() {
    Serial.begin(115200);

    ledcSetup(LEDC_CHANNEL_0, 10000 /* Hz */, 12);
    ledcSetup(LEDC_CHANNEL_1, 10000 /* Hz */, 12);

    ledcAttachPin(GPIO_NUM_32, LEDC_CHANNEL_0);
    ledcAttachPin(GPIO_NUM_25, LEDC_CHANNEL_1);
}

/**
 * @brief 计算给定频率正弦波的 PWM 占空比（假设 12 位分辨率）
 * 给定频率。micros() 用作时基
 *
 * @param frequency 频率，单位 Hz
 * @return int 对应的 12 位 PWM 值
 */
int sinePWMValue(float frequency, int maxPWMValue, float (*sinCos)(float)) {
  unsigned long currentMicros = micros(); // get the current time in microseconds

  // 计算当前时间的正弦波值
  int halfMax = maxPWMValue/2;
  int sineValue = halfMax + (halfMax-10) * sinCos(2 * PI * currentMicros / (1000000 / frequency));
  return sineValue;
}

void loop() {
    // Example of how to change the duty cycle to 25%
    ledcWrite(LEDC_CHANNEL_0, sinePWMValue(1.0, 4096, sinf));
    ledcWrite(LEDC_CHANNEL_1, sinePWMValue(1.0, 4096, cosf));
}