[问答]

STM32L010C6Tx如何使用睡眠模式？

问答对人有帮助，内容完整，我也想知道答案 0 你好。我正在使用 STM32L010C6Tx。我希望我的微处理器在处理后休眠 10 秒。我想使用睡眠模式。我没有任何中断引脚。我希望它在 10 秒后醒来。我能怎么做？ 0
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答案对人有帮助，有参考价值 0 找到附上我的 STM32L010x 代码。它利用 RTC 唤醒定时器每 10 秒将 CPU 从睡眠模式唤醒。 RTC 由 LSE（精确的外部低速振荡器）计时。我将异步 RTC 分频器设置为 127，将同步 RTC 分频器设置为 255 以获得 1 Hz（查看参考手册 RM0451，同步预分频器输出上的这个时钟标记为 ck_spre）然后使用 ck_spre 时钟为 RTC 唤醒定时器供电（因此 1 个时钟周期需要 1 秒）。 RTC 唤醒定时器设置为 0x0009，每 10 秒触发一次中断。如果您的电路板上没有适用于 LSE 的 32.768k 石英，您可能希望将 RTC 时钟源从 LSE 更改为 LSI。那么唤醒周期将远不准确。在进入睡眠模式之前，您需要禁用 SysTick 定时器，否则它的中断将在 1 ms 内唤醒 CPU（SysTick 通常设置为每 1 ms 引发一次中断）。 STM32CubeMX 生成的 HAL 代码在 main 函数的开头配置 SysTick。要禁用 SysTick，您可以调用： HAL_SuspendTick(); 唤醒后，我在再次进入睡眠模式之前切换 PA5，以使用我的 Saleae 数字分析仪验证正确的唤醒周期（见下图）。通过移除关联的 GPIO 代码，可以轻松移除此部分。 /* USER CODE BEGIN Header / /* ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2022 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** / / USER CODE END Header / / 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 ---------------------------------------------------------/ RTC_HandleTypeDef hrtc; / USER CODE BEGIN PV / / USER CODE END PV / / Private function prototypes -----------------------------------------------/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_RTC_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_RTC_Init(); / USER CODE BEGIN 2 / HAL_RTCEx_DeactivateWakeUpTimer(&hrtc); __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hrtc, RTC_FLAG_WUTF); __HAL_RTC_WAKEUPTIMER_EXTI_CLEAR_FLAG(); HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0x0009, RTC_WAKEUPCLOCK_CK_SPRE_16BITS); //ck_spre ~1 Hz (40 kHz div127 div 315) used as clock for the RTC wake-up timer / USER CODE END 2 / / Infinite loop / / USER CODE BEGIN WHILE / while (1) { / USER CODE END WHILE / / USER CODE BEGIN 3 / HAL_SuspendTick(); // Disable SysTick, otherwise it would wake-up the CPU within 1 ms HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI); HAL_ResumeTick(); // Enable SysTick after wake-up HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5); // Toggle with a pin to check the wake-up period } / USER CODE END 3 / } /* * @brief System Clock Configuration * @retval None / void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; /* Configure the main internal regulator output voltage / __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /* Configure LSE Drive Capability / HAL_PWR_EnableBkUpAccess(); __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW); /* Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. / RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI\|RCC_OSCILLATORTYPE_LSE; RCC_OscInitStruct.LSEState = RCC_LSE_ON; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } /* Initializes the CPU, AHB and APB buses clocks / RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK\|RCC_CLOCKTYPE_SYSCLK \|RCC_CLOCKTYPE_PCLK1\|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) { Error_Handler(); } PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_RTC; PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) { Error_Handler(); } } /* * @brief RTC Initialization Function * @param None * @retval None / static void MX_RTC_Init(void) { / USER CODE BEGIN RTC_Init 0 / / USER CODE END RTC_Init 0 / / USER CODE BEGIN RTC_Init 1 / / USER CODE END RTC_Init 1 / /* Initialize RTC Only / hrtc.Instance = RTC; hrtc.Init.HourFormat = RTC_HOURFORMAT_24; hrtc.Init.AsynchPrediv = 127; hrtc.Init.SynchPrediv = 255; hrtc.Init.OutPut = RTC_OUTPUT_DISABLE; hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE; hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; if (HAL_RTC_Init(&hrtc) != HAL_OK) { Error_Handler(); } / USER CODE BEGIN RTC_Init 2 / / USER CODE END RTC_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_GPIOA_CLK_ENABLE(); /Configure GPIO pin Output Level / HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET); /Configure GPIO pin : PA5 / GPIO_InitStruct.Pin = GPIO_PIN_5; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } / USER CODE BEGIN 4 / void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef hrtc) { // Callback called from the RTC interrupt service routine } /* 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 / __disable_irq(); while (1) { } / 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, ex: printf("Wrong parameters value: file %s on line %drn", file, line) / / USER CODE END 6 / } #endif / USE_FULL_ASSERT */

2022-12-14 11:47:52 评论举报夏焕丽