用定时器获取数据效率很高

Core/Src/main.c

@@ -42,6 +42,8 @@
 /* Private variables ---------------------------------------------------------*/
 I2C_HandleTypeDef hi2c2;
 
+TIM_HandleTypeDef htim6;
+
 SRAM_HandleTypeDef hsram1;
 
 /* USER CODE BEGIN PV */
@@ -53,6 +55,7 @@ void SystemClock_Config(void);
 static void MX_GPIO_Init(void);
 static void MX_FSMC_Init(void);
 static void MX_I2C2_Init(void);
+static void MX_TIM6_Init(void);
 /* USER CODE BEGIN PFP */
 
 /* USER CODE END PFP */
@@ -92,6 +95,7 @@ int main(void)
   MX_GPIO_Init();
   MX_FSMC_Init();
   MX_I2C2_Init();
+  MX_TIM6_Init();
   /* USER CODE BEGIN 2 */
   main_app();
   /* USER CODE END 2 */
@@ -179,6 +183,44 @@ static void MX_I2C2_Init(void)
 
 }
 
+/**
+  * @brief TIM6 Initialization Function
+  * @param None
+  * @retval None
+  */
+static void MX_TIM6_Init(void)
+{
+
+  /* USER CODE BEGIN TIM6_Init 0 */
+
+  /* USER CODE END TIM6_Init 0 */
+
+  TIM_MasterConfigTypeDef sMasterConfig = {0};
+
+  /* USER CODE BEGIN TIM6_Init 1 */
+
+  /* USER CODE END TIM6_Init 1 */
+  htim6.Instance = TIM6;
+  htim6.Init.Prescaler = 72-1;
+  htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
+  htim6.Init.Period = 10000-1;
+  htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+  if (HAL_TIM_Base_Init(&htim6) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
+  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+  if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  /* USER CODE BEGIN TIM6_Init 2 */
+
+  /* USER CODE END TIM6_Init 2 */
+
+}
+
 /**
   * @brief GPIO Initialization Function
   * @param None

Core/Src/stm32f1xx_hal_msp.c

@@ -146,6 +146,56 @@ void HAL_I2C_MspDeInit(I2C_HandleTypeDef* hi2c)
 
 }
 
+/**
+* @brief TIM_Base MSP Initialization
+* This function configures the hardware resources used in this example
+* @param htim_base: TIM_Base handle pointer
+* @retval None
+*/
+void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
+{
+  if(htim_base->Instance==TIM6)
+  {
+  /* USER CODE BEGIN TIM6_MspInit 0 */
+
+  /* USER CODE END TIM6_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_TIM6_CLK_ENABLE();
+    /* TIM6 interrupt Init */
+    HAL_NVIC_SetPriority(TIM6_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(TIM6_IRQn);
+  /* USER CODE BEGIN TIM6_MspInit 1 */
+
+  /* USER CODE END TIM6_MspInit 1 */
+  }
+
+}
+
+/**
+* @brief TIM_Base MSP De-Initialization
+* This function freeze the hardware resources used in this example
+* @param htim_base: TIM_Base handle pointer
+* @retval None
+*/
+void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim_base)
+{
+  if(htim_base->Instance==TIM6)
+  {
+  /* USER CODE BEGIN TIM6_MspDeInit 0 */
+
+  /* USER CODE END TIM6_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_TIM6_CLK_DISABLE();
+
+    /* TIM6 interrupt DeInit */
+    HAL_NVIC_DisableIRQ(TIM6_IRQn);
+  /* USER CODE BEGIN TIM6_MspDeInit 1 */
+
+  /* USER CODE END TIM6_MspDeInit 1 */
+  }
+
+}
+
 static uint32_t FSMC_Initialized = 0;
 
 static void HAL_FSMC_MspInit(void){

Core/Src/stm32f1xx_it.c

@@ -56,7 +56,7 @@
 /* USER CODE END 0 */
 
 /* External variables --------------------------------------------------------*/
-
+extern TIM_HandleTypeDef htim6;
 /* USER CODE BEGIN EV */
 
 /* USER CODE END EV */
@@ -199,6 +199,20 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32f1xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles TIM6 global interrupt.
+  */
+void TIM6_IRQHandler(void)
+{
+  /* USER CODE BEGIN TIM6_IRQn 0 */
+
+  /* USER CODE END TIM6_IRQn 0 */
+  HAL_TIM_IRQHandler(&htim6);
+  /* USER CODE BEGIN TIM6_IRQn 1 */
+
+  /* USER CODE END TIM6_IRQn 1 */
+}
+
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */