feat: 添加TIM4心跳闪烁并更新文档

Core/Src/main.c

@@ -21,6 +21,7 @@
 #include "dma.h"
 #include "iwdg.h"
 #include "spi.h"
+#include "tim.h"
 #include "usart.h"
 #include "gpio.h"
 
@@ -67,6 +68,7 @@
 /* Private variables ---------------------------------------------------------*/
 
 /* USER CODE BEGIN PV */
+static volatile uint16_t g_led_blink_ticks = 0;
 
 /* USER CODE END PV */
 
@@ -75,6 +77,7 @@ void SystemClock_Config(void);
 /* USER CODE BEGIN PFP */
 static void CH390_HardwareReset(void);
 static void LED_Init(void);
+static void LED_StartBlink(void);
 static void App_Init(void);
 static void App_Poll(void);
 /* USER CODE END PFP */
@@ -109,6 +112,13 @@ static void LED_Init(void)
     HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
 }
 
+static void LED_StartBlink(void)
+{
+    if (HAL_TIM_Base_Start_IT(&htim4) != HAL_OK) {
+        Error_Handler();
+    }
+}
+
 /**
  * @brief LED 闪烁（用于指示系统运行状态）
  */
@@ -117,6 +127,17 @@ void LED_Toggle(void)
     HAL_GPIO_TogglePin(LED_PORT, LED_PIN);
 }
 
+void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
+{
+    if (htim->Instance == TIM4) {
+        g_led_blink_ticks++;
+        if (g_led_blink_ticks >= 1000u) {
+            g_led_blink_ticks = 0u;
+            LED_Toggle();
+        }
+    }
+}
+
 static void App_Init(void)
 {
     const device_config_t *cfg;
@@ -247,10 +268,12 @@ int main(void)
   MX_USART2_UART_Init();
   MX_USART3_UART_Init();
   MX_SPI1_Init();
+  MX_TIM4_Init();
   /* USER CODE BEGIN 2 */
   
   /* LED 初始化 */
   LED_Init();
+  LED_StartBlink();
   
   /* CH390 硬件复位 */
   CH390_HardwareReset();

Core/Src/stm32f1xx_it.c

@@ -59,6 +59,7 @@
 
 /* External variables --------------------------------------------------------*/
 extern SPI_HandleTypeDef hspi1;
+extern TIM_HandleTypeDef htim4;
 extern DMA_HandleTypeDef hdma_usart1_rx;
 extern DMA_HandleTypeDef hdma_usart1_tx;
 extern DMA_HandleTypeDef hdma_usart2_rx;
@@ -268,6 +269,20 @@ void DMA1_Channel7_IRQHandler(void)
   /* USER CODE END DMA1_Channel7_IRQn 1 */
 }
 
+/**
+  * @brief This function handles TIM4 global interrupt.
+  */
+void TIM4_IRQHandler(void)
+{
+  /* USER CODE BEGIN TIM4_IRQn 0 */
+
+  /* USER CODE END TIM4_IRQn 0 */
+  HAL_TIM_IRQHandler(&htim4);
+  /* USER CODE BEGIN TIM4_IRQn 1 */
+
+  /* USER CODE END TIM4_IRQn 1 */
+}
+
 /**
   * @brief This function handles SPI1 global interrupt.
   */

Core/Src/tim.c

@@ -0,0 +1,100 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    tim.c
+  * @brief   This file provides code for the configuration of the TIM instances.
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+/* Includes ------------------------------------------------------------------*/
+#include "tim.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+TIM_HandleTypeDef htim4;
+
+/* TIM4 init function */
+void MX_TIM4_Init(void)
+{
+
+  /* USER CODE BEGIN TIM4_Init 0 */
+
+  /* USER CODE END TIM4_Init 0 */
+
+  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
+  TIM_MasterConfigTypeDef sMasterConfig = {0};
+
+  /* USER CODE BEGIN TIM4_Init 1 */
+
+  /* USER CODE END TIM4_Init 1 */
+  htim4.Instance = TIM4;
+  htim4.Init.Prescaler = 7199;
+  htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
+  htim4.Init.Period = 9;
+  htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+  htim4.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+  if (HAL_TIM_Base_Init(&htim4) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
+  if (HAL_TIM_ConfigClockSource(&htim4, &sClockSourceConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
+  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+  if (HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  /* USER CODE BEGIN TIM4_Init 2 */
+
+  /* USER CODE END TIM4_Init 2 */
+
+}
+
+void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
+{
+
+  if(tim_baseHandle->Instance==TIM4)
+  {
+  /* USER CODE BEGIN TIM4_MspInit 0 */
+
+  /* USER CODE END TIM4_MspInit 0 */
+    /* TIM4 clock enable */
+    __HAL_RCC_TIM4_CLK_ENABLE();
+
+    /* TIM4 interrupt Init */
+    HAL_NVIC_SetPriority(TIM4_IRQn, 6, 0);
+    HAL_NVIC_EnableIRQ(TIM4_IRQn);
+  /* USER CODE BEGIN TIM4_MspInit 1 */
+
+  /* USER CODE END TIM4_MspInit 1 */
+  }
+}
+
+void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle)
+{
+
+  if(tim_baseHandle->Instance==TIM4)
+  {
+  /* USER CODE BEGIN TIM4_MspDeInit 0 */
+
+  /* USER CODE END TIM4_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_TIM4_CLK_DISABLE();
+
+    /* TIM4 interrupt Deinit */
+    HAL_NVIC_DisableIRQ(TIM4_IRQn);
+  /* USER CODE BEGIN TIM4_MspDeInit 1 */
+
+  /* USER CODE END TIM4_MspDeInit 1 */
+  }
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */