stm32 pwm 呼吸灯

#include "main.h"

#include "stm32f0xx_hal.h"

/* USER CODE BEGIN Includes */

int i=0;

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/

TIM_HandleTypeDef htim3;

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_USART1_UART_Init(void);

static void MX_TIM3_Init(void);                                    

void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);

/* USER CODE BEGIN PFP */

/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)

{

HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1|GPIO_PIN_2);

}

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void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)

{

i++;

}

/* USER CODE END 0 */

/**

  * @brief  The application entry point.

  *

  * @retval None

  */

int main(void)

{

  /* USER CODE BEGIN 1 */

  /* 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_USART1_UART_Init();

  MX_TIM3_Init();

  /* USER CODE BEGIN 2 */

HAL_TIM_Base_Start_IT(&htim3);

HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_3);

  /* USER CODE END 2 */

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

/*uint8_t data = 0;

HAL_UART_Receive(&huart1, &data, 1, 0);

if(data == 'l')

{

HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2, GPIO_PIN_RESET);

HAL_UART_Transmit(&huart1, &data, 1, 0);

}

else if(data == 'h')

{

HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2, GPIO_PIN_SET);

HAL_UART_Transmit(&huart1, &data, 1, 0);

} */

int j;

for(j=100;j>=50;j--)

{

__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, j);

HAL_Delay(15);

}

for(j=50;j<=100;j++)

{

__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_3, j);

HAL_Delay(15);

}

  }

  /* USER CODE END 3 */

}