【iCore4 双核心板_ARM】例程八:定时器PWM实验——呼吸灯

实验原理:
  STM32的定时器有PWM功能,iCore4的蓝色LED连接在定时器的输出接口上,

可以通过定时器的PWM输出控制LED的亮度,从而实验呼吸灯的功能。

核心代码:

int main(void)
{

  /* USER CODE BEGIN 1 */
    int brightness = 0;
    float temp = 0.0;
    int data = 0;
  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM1_Init();

  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */
        HAL_Delay(30);
        if(brightness == 100){
            brightness = 0;
        }
        temp =  199 * (sin(2 * PI / 99.0 * brightness) * 0.5 + 0.5);
        data = (int)temp;
        set_compare(data);
        
        brightness ++;
  }
  /* USER CODE END 3 */

}

源代码下载链接:

链接:http://pan.baidu.com/s/1hsQnbEW 密码:z12v

iCore4链接:

posted @ 2017-08-16 16:24  XiaomaGee  阅读(743)  评论(0编辑  收藏  举报