使用 nucleo 开发板进行 RGB 颜色混合

RGB Color mixing using nucleo development board

提问人：Mendi 提问时间：7/27/2023 最后编辑：IssylinMendi 更新时间：7/30/2023 访问量：36

问：

我的party_sequence功能（在情况 9 中：持续运行（按预期），但是当我尝试使用按钮开关关闭 LED 时，该功能仍在运行。

如何让函数在关闭开关时停止运行，并在重新打开开关时返回 case：0？

我正在使用一个简单的按钮开关来切换颜色。

我是编程新手，所以如果您需要更多信息，请告诉我。

谢谢！

party_sequence功能：

  void party_sequence(void) {
      int i = 0;

      while (1) {
          for (i = 0; i < 360; i++) {
              __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, sins[i]); // Red
              __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, sins[(i + 120) % 360]); // Green
              __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, sins[(i + 240) % 360]); // Blue

              HAL_Delay(2);
          }
      }
  };

完整代码：

int main(void)
{

  HAL_Init();

  SystemClock_Config();


  MX_GPIO_Init();
  MX_TIM3_Init();

  HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_3); // Red
  HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2); // Green
  HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_4); // Blue

    uint8_t sins[360] = {
        127,129,131,134,136,138,140,143,145,147,149,151,154,156,158,160,162,164,166,169,171,173,175,177,179,181,183,185,187,189,191,193,195,196,198,200,
        202,204,205,207,209,211,212,214,216,217,219,220,222,223,225,226,227,229,230,231,233,234,235,236,237,239,240,241,242,243,243,244,245,246,247,248,
        248,249,250,250,251,251,252,252,253,253,253,254,254,254,254,254,254,254,255,254,254,254,254,254,254,254,253,253,253,252,252,251,251,250,250,249,
        248,248,247,246,245,244,243,243,242,241,240,239,237,236,235,234,233,231,230,229,227,226,225,223,222,220,219,217,216,214,212,211,209,207,205,204,
        202,200,198,196,195,193,191,189,187,185,183,181,179,177,175,173,171,169,166,164,162,160,158,156,154,151,149,147,145,143,140,138,136,134,131,129,
        127,125,123,120,118,116,114,111,109,107,105,103,100,98,96,94,92,90,88,85,83,81,79,77,75,73,71,69,67,65,63,61,59,58,56,54,
        52,50,49,47,45,43,42,40,38,37,35,34,32,31,29,28,27,25,24,23,21,20,19,18,17,15,14,13,12,11,11,10,9,8,7,6,
        6,5,4,4,3,3,2,2,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,2,2,3,3,4,4,5,
        6,6,7,8,9,10,11,11,12,13,14,15,17,18,19,20,21,23,24,25,27,28,29,31,32,34,35,37,38,40,42,43,45,47,49,50,
        52,54,56,58,59,61,63,65,67,69,71,73,75,77,79,81,83,85,88,90,92,94,96,98,100,103,105,107,109,111,114,116,118,120,123,125
    };

  enum button_state_e {
      BUTTON_NOT_PRESSED,
      BUTTON_JUST_PRESSED,
      BUTTON_PRESSED
  };

  static enum button_state_e button_state = BUTTON_NOT_PRESSED;

  static uint8_t color_sequence = 0;

  void red_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 230); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 0); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 0); // Blue
  };

  void green_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 0); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 230); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 0); // Blue
  };

  void blue_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 0); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 0); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 230); // Blue
  };

  void pink_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 230); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 0); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 50); // Blue
  };

  void teal_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 0); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 230); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 230); // Blue
  };

  void yellow_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 230); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 140); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 0); // Blue

  };

  void orange_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 230); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 25); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 0); // Blue
  };

  void purple_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 230); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 0); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 100); // Blue
  };

  void white_sequence(void) {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 230); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 230); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 230); // Blue
  };

  void party_sequence(void) {
      int i = 0;

      while (1) {
          for (i = 0; i < 360; i++) {
              __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, sins[i]); // Red
              __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, sins[(i + 120) % 360]); // Green
              __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, sins[(i + 240) % 360]); // Blue

              HAL_Delay(2);
          }
      }
  };

  void switch_off_all_leds(void)
  {
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, 0); // Red
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, 0); // Green
      __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, 0); // Blue
  };

  while (1)
  {

     bool pressed = (HAL_GPIO_ReadPin(Toggle_Switch_GPIO_Port, Toggle_Switch_Pin) == GPIO_PIN_SET);

        switch (button_state)
        {
            case BUTTON_NOT_PRESSED:
                if (pressed)
                    button_state = BUTTON_JUST_PRESSED;
                break;

            case BUTTON_JUST_PRESSED:
                if (pressed)
                {
                    button_state = BUTTON_PRESSED;

                    switch (color_sequence) {

                    case 0:
                        red_sequence();
                        break;
                    case 1:
                        green_sequence();
                        break;
                    case 2:
                        blue_sequence();
                        break;
                    case 3:
                        pink_sequence();
                        break;
                    case 4:
                        teal_sequence();
                        break;
                    case 5:
                        yellow_sequence();
                        break;
                    case 6:
                        orange_sequence();
                        break;
                    case 7:
                        purple_sequence();
                        break;
                    case 8:
                        white_sequence();
                        break;
                    case 9:
                        party_sequence();
                        break;
                    }

                    color_sequence = (color_sequence + 1) % 10;
                }
                else
                    button_state = BUTTON_NOT_PRESSED;
                break;

            case BUTTON_PRESSED:
                if (!pressed)
                {
                    button_state = BUTTON_NOT_PRESSED;
                    switch_off_all_leds();
                }
                break;
        }

        HAL_Delay(10);

  }
}
C STM32 RGB 核

评论

1赞 Chillzy 7/27/2023
我很确定切换序列将无限运行，因为它处于无限 while 循环下，所以也许更改它可能会有所帮助，但不太确定

答：

2赞 pmacfarlane 7/27/2023 #1

如何将无限循环更改为以下版本：while (1)party_sequence()

while (HAL_GPIO_ReadPin(Toggle_Switch_GPIO_Port, Toggle_Switch_Pin) == GPIO_PIN_SET)
{
    // Do the party sequence
}

也就是说，只要开关处于“打开”状态，它就会运行，但当开关“关闭”时，它就会停止。然后您的主回路将看到开关已关闭并关闭 LED。

作为替代方案，如果您希望它立即关闭而不是完成序列，请执行以下操作：

while (1) {
    for (i = 0; i < 360; i++) {
        __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, sins[i]); // Red
        __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, sins[(i + 120) % 360]); // Green
        __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, sins[(i + 240) % 360]); // Blue

        HAL_Delay(2);

        if (HAL_GPIO_ReadPin(Toggle_Switch_GPIO_Port, Toggle_Switch_Pin) != GPIO_PIN_SET)
            return;
    }
}

评论

0赞 Mendi 7/27/2023
那奏效了，谢谢！在party_sequence关闭之前有一点滞后，但试图弄清楚这一点。编辑：当我尝试在功能运行过程中转动 LED 时，需要几毫秒才能关闭。
1赞 pmacfarlane 7/27/2023
@Mendi我添加了一个响应更快的版本。
0赞 Mendi 7/27/2023
感谢您的帮助！这效果很好！

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