[问答]

IWDG无法写入预分频器和重载寄存器的原因？

问答对人有帮助，内容完整，我也想知道答案 0 我正在尝试检查 Nucleo-L4R5ZI 板上的 IWDG 功能。参考可用于 NUCLEO-L496ZG 的示例代码，我为 L4R5ZI nucleo 创建了新项目。我试图在调试模式下逐步进行。当调试器在 HAL_IWDG_Init(&hiwdg) 内部时，它能够使用 __HAL_IWDG_START(hiwdg) 成功启用 IWDG；但是什么时候进入 IWDG_ENABLE_WRITE_ACCESS(hiwdg); 调试器进入系统内存。我通过暂停调试确认了这一点，它停在 0x1FFFxxxx 地址。同时，LD3 LED 发光。在我控制 LD3 的代码中没有任何地方。怎么了？请帮助。代码如下： /* Includes ------------------------------------------------------------------/ #include "main.h" / Private includes ----------------------------------------------------------/ / USER CODE BEGIN Includes / / USER CODE END Includes / / Private typedef -----------------------------------------------------------/ / USER CODE BEGIN PTD / / USER CODE END PTD / / Private define ------------------------------------------------------------/ / USER CODE BEGIN PD / / USER CODE END PD / / Private macro -------------------------------------------------------------/ / USER CODE BEGIN PM / / USER CODE END PM / / Private variables ---------------------------------------------------------/ IWDG_HandleTypeDef hiwdg; UART_HandleTypeDef hlpuart1; UART_HandleTypeDef huart1; UART_HandleTypeDef huart3; PCD_HandleTypeDef hpcd_USB_OTG_FS; / USER CODE BEGIN PV / / USER CODE END PV / / Private function prototypes -----------------------------------------------/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_LPUART1_UART_Init(void); static void MX_USART3_UART_Init(void); static void MX_USB_OTG_FS_PCD_Init(void); static void MX_IWDG_Init(void); / USER CODE BEGIN PFP / / USER CODE END PFP / / Private user code ---------------------------------------------------------/ / USER CODE BEGIN 0 / / USER CODE END 0 / /* * @brief The application entry point. * @retval int / 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_LPUART1_UART_Init(); MX_USART3_UART_Init(); MX_USB_OTG_FS_PCD_Init(); MX_IWDG_Init(); / USER CODE BEGIN 2 / if(HAL_IWDG_Init(&hiwdg) != HAL_OK) { / Initialization Error / Error_Handler(); } / USER CODE END 2 / / Infinite loop / / USER CODE BEGIN WHILE / while (1) { / USER CODE END WHILE / / Refresh IWDG: reload counter / if(HAL_IWDG_Refresh(&hiwdg) != HAL_OK) { / Refresh Error / Error_Handler(); } HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_RESET); while(1); / USER CODE BEGIN 3 / } / USER CODE END 3 / } /* * @brief IWDG Initialization Function * @param None * @retval None / static void MX_IWDG_Init(void) { / USER CODE BEGIN IWDG_Init 0 / / USER CODE END IWDG_Init 0 / / USER CODE BEGIN IWDG_Init 1 / / USER CODE END IWDG_Init 1 / hiwdg.Instance = IWDG; hiwdg.Init.Prescaler = IWDG_PRESCALER_32; hiwdg.Init.Window = IWDG_WINDOW_DISABLE; hiwdg.Init.Reload = 4095; if (HAL_IWDG_Init(&hiwdg) != HAL_OK) { Error_Handler(); } / USER CODE BEGIN IWDG_Init 2 / / USER CODE END IWDG_Init 2 / } /* * @brief GPIO Initialization Function * @param None * @retval None / static void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct = {0}; / GPIO Ports Clock Enable / __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOH_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOD_CLK_ENABLE(); __HAL_RCC_GPIOG_CLK_ENABLE(); HAL_PWREx_EnableVddIO2(); /Configure GPIO pin Output Level / HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_SET); /Configure GPIO pin Output Level / HAL_GPIO_WritePin(GPIOB, LD3_Pin\|LD2_Pin, GPIO_PIN_RESET); /Configure GPIO pin Output Level / HAL_GPIO_WritePin(USB_PowerSwitchOn_GPIO_Port, USB_PowerSwitchOn_Pin, GPIO_PIN_RESET); /Configure GPIO pin : B1_Pin / GPIO_InitStruct.Pin = B1_Pin; GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct); /Configure GPIO pin : PA0 / GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /Configure GPIO pins : LD3_Pin LD2_Pin / GPIO_InitStruct.Pin = LD3_Pin\|LD2_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); /Configure GPIO pin : USB_PowerSwitchOn_Pin / GPIO_InitStruct.Pin = USB_PowerSwitchOn_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(USB_PowerSwitchOn_GPIO_Port, &GPIO_InitStruct); /Configure GPIO pin : USB_OverCurrent_Pin / GPIO_InitStruct.Pin = USB_OverCurrent_Pin; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(USB_OverCurrent_GPIO_Port, &GPIO_InitStruct); } / USER CODE BEGIN 4 / / USER CODE END 4 / /* * @brief This function is executed in case of error occurrence. * @retval None / void Error_Handler(void) { / USER CODE BEGIN Error_Handler_Debug / / User can add his own implementation to report the HAL error return state / / USER CODE END Error_Handler_Debug / } #ifdef USE_FULL_ASSERT /* * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None / void assert_failed(uint8_t file, uint32_t line) { /* USER CODE BEGIN 6 / / User can add his own implementation to report the file name and line number, tex: printf("Wrong parameters value: file %s on line %drn", file, line) / / USER CODE END 6 / } #endif / USE_FULL_ASSERT / /********************* (C) COPYRIGHT STMicroelectronics *END OF FILE**/ 0
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答案对人有帮助，有参考价值 0 我发现了问题。我在调试模式下测试。这就是原因。数据表说“当设备进入调试模式（内核暂停）时，IWDG 计数器继续正常工作或停止，具体取决于 DBGMCU 冻结寄存器中相应位的配置。” 因此，当我退出调试模式并进行电源回收时，我可以看到预期的行为。

2023-1-29 11:52:17 评论举报凌流浪