[问答]

STM32L053C8-Discovery开发板LPTIM例程，下载进开发板，程序不能正常进行的原因？

问答对人有帮助，内容完整，我也想知道答案 0 在开发板目录：STM32Cube_FW_L0_V1.8.0ProjectsSTM32L053C8-DiscoveryExamplesLPtiM路径的这个例程：没有做任何修改，但是下载进开发板，程序不能正常进行， LPTIM唤醒定时器没有进入中断，本来进入中断LED灯会亮起来，然后唤醒STOP模式。但是开发板灯没有亮，中断没进去。难道开发板的代码也这么补严谨？ / **************************************************************************** * @file LPTIM/LPTIM_Timeout/Src/main.c * @author MCD Application Team * @version V1.8.0 * @date 25-November-2016 * @brief This example describes how to implement a low power timeout to * wake-up the system using the LPTIMER, through the STM32L0xx HAL API. ****************************************************************************** * @attention * * © COPYRIGHT(c) 2016 STMicroelectronics * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** / / Includes ------------------------------------------------------------------/ #include "main.h" /* @addtogroup STM32L0xx_HAL_Examples * @{ / /* @addtogroup LPTIM_Timeout * @{ / / Private typedef -----------------------------------------------------------/ / Private define ------------------------------------------------------------/ / Set the Maximum value of the counter (Auto-Reload) that defines the Period / #define Period (uint32_t) 65535 / Set the Timeout value / #define Timeout (uint32_t) (32768 - 1) / Private macro -------------------------------------------------------------/ / Private variables ---------------------------------------------------------/ / LPTIM handle declaration / LPTIM_HandleTypeDef LptimHandle; / Clocks structure declaration / RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct; / Private function prototypes -----------------------------------------------/ static void SystemClock_Config(void); static void LSE_ClockEnable(void); static void Error_Handler(void); / Private functions ---------------------------------------------------------/ static void SystemClockConfig_STOP(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; / Enable Power Control clock / __HAL_RCC_PWR_CLK_ENABLE(); / The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. / __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); / Get the Oscillators configuration according to the internal RCC registers / HAL_RCC_GetOscConfig( RCC_OscInitStruct); / After wake-up from STOP reconfigure the system clock: Enable HSI and PLL / RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; RCC_OscInitStruct.HSEState = RCC_HSE_OFF; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL4; RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV2; RCC_OscInitStruct.HSICalibrationValue = 0x10; if(HAL_RCC_OscConfig( RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } / Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers / RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; if(HAL_RCC_ClockConfig( RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { Error_Handler(); } } /* * @brief Main program * @param None * @retval None / int main(void) { / This sample code shows how to use STM32L0xx LPTIM HAL API to realize a timeout function to wakeup the system from Stop mode. To proceed, 4 steps are required: / / STM32L0xx HAL library initialization: - Configure the Flash prefetch, Flash preread and Buffer caches - Systick timer is configured by default as source of time base, but user can eventually implement his proper time base source (a general purpose timer for example or other time source), keeping in mind that Time base duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and handled in milliseconds basis. - Low Level Initialization / HAL_Init(); / Configure the System clock to have a frequency of 2 MHz (Up to 32MHZ possible) / SystemClock_Config(); / Enable the LSE source / LSE_ClockEnable(); / Initialize LED2 / BSP_LED_Init(LED2); / ### - 1 - Re-target the LSE to Clock the LPTIM Counter ################# / / Select the LSE clock as LPTIM peripheral clock / RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LPTIM1; RCC_PeriphCLKInitStruct.LptimClockSelection = RCC_LPTIM1CLKSOURCE_LSI; HAL_RCCEx_PeriphCLKConfig( RCC_PeriphCLKInitStruct); / ### - 2 - Initialize LPTIM peripheral ################################## / / * Instance = LPTIM1. * Clock Source = APB or LowPowerOSCillator (in this example LSE is * already selected from the RCC level). * Counter source = Internal event. * Clock prescaler = 1 (No division). * Counter Trigger = Trigger1: PC3 or PB6 (PC3 in this example). * Active Edge = Rising edge. / LptimHandle.Instance = LPTIM1; LptimHandle.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC; LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1; LptimHandle.Init.Trigger.Source = LPTIM_TRIGSOURCE_0; LptimHandle.Init.Trigger.ActiveEdge = LPTIM_ACTIVEEDGE_RISING; LptimHandle.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL; / Initialize LPTIM peripheral according to the passed parameters / if (HAL_LPTIM_Init( LptimHandle) != HAL_OK) { Error_Handler(); } / ### - 3 - Start the Timeout function in interrupt mode ################# / / * Period = 65535 * Pulse = 32767 * According to this configuration (LPTIMER clocked by LSE compare = 32767, * the Timeout period = (compare + 1)/LSE_Frequency = 1s / if (HAL_LPTIM_TimeOut_Start_IT( LptimHandle, Period, Timeout) != HAL_OK) { Error_Handler(); } / ### - 4 - Enter in Stop mode ########################################### / HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI); / Infinite Loop / // while (1) // { // // } } /* * @brief Compare match callback in non blocking mode * @param hlptim : LPTIM handle * @retval None / void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef hlptim) { /* Timeout was reached, turn on LED2 / BSP_LED_On(LED2); } /* * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = MSI * SYSCLK(Hz) = 2000000 * HCLK(Hz) = 2000000 * AHB Prescaler = 1 * APB1 Prescaler = 1 * APB2 Prescaler = 1 * Flash Latency(WS) = 0 * Main regulator output voltage = Scale3 mode * @param None * @retval None / static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; / Enable Power Control clock / __HAL_RCC_PWR_CLK_ENABLE(); / The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. / __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3); / Enable MSI Oscillator / RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; RCC_OscInitStruct.MSIState = RCC_MSI_ON; RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5; RCC_OscInitStruct.MSICalibrationValue=0x00; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; if(HAL_RCC_OscConfig( RCC_OscInitStruct) != HAL_OK) { / Initialization Error / Error_Handler(); } / Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers / RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK \| RCC_CLOCKTYPE_HCLK \| RCC_CLOCKTYPE_PCLK1 \| RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; 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) { / Initialization Error / Error_Handler(); } } /* * @brief Enable External Low Speed Clock (LSE) * @param None * @retval None / static void LSE_ClockEnable(void) { RCC_OscInitTypeDef RCC_OscInitStruct; / Enable LSE clock / RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; RCC_OscInitStruct.LSEState = RCC_LSE_ON; HAL_RCC_OscConfig( RCC_OscInitStruct); } /* * @brief This function is executed in case of error occurrence. * @param None * @retval None / static void Error_Handler(void) { / Infinite loop / while(1) { } } #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 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) / / Infinite loop / while (1) { } } #endif /* * @} / /* * @} / /********************* (C) COPYRIGHT STMicroelectronics *END OF FILE**/ 0 本主题由 Harmony技术专家于 2024-5-7 09:55 审核通过
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答案对人有帮助，有参考价值 0 STM32L053C8-Discovery开发板的LPTIM例程无法正常运行可能有以下几个原因： 1. 固件库版本不匹配：确保你使用的STM32Cube固件库版本与开发板兼容。你提到使用的是STM32Cube_FW_L0_V1.8.0，确保这个版本适用于你的开发板。 2. 时钟配置问题：检查LPTIM的时钟配置是否正确。确保LPTIM的时钟源和时钟频率设置正确，以便LPTIM能够正常工作。 3. 中断配置问题：检查中断配置是否正确。确保LPTIM中断已启用，并且中断优先级设置正确。 4. GPIO配置问题：检查LED灯的GPIO配置是否正确。确保GPIO引脚已正确配置为输出模式，并且与LED灯连接正确。 5. LPTIM初始化问题：检查LPTIM的初始化设置是否正确。确保LPTIM的计数器模式、触发源、自动重载寄存器等设置正确。 6. 唤醒源配置问题：检查唤醒源配置是否正确。确保LPTIM被配置为唤醒源，并且在进入STOP模式时能够唤醒MCU。 7. 硬件问题：如果以上步骤都检查过了，但问题仍然存在，可能是开发板本身存在硬件问题。尝试使用其他例程或项目验证开发板是否正常工作。 8. 固件库代码问题：虽然固件库通常经过严格测试，但仍然可能存在一些问题。你可以尝试查找固件库的更新版本，或者在STM32社区寻求帮助。为了解决这个问题，你可以按照以下步骤进行排查： 1. 检查固件库版本是否与开发板兼容。 2. 检查LPTIM的时钟配置。 3. 检查中断配置。 4. 检查GPIO配置。 5. 检查LPTIM初始化设置。 6. 检查唤醒源配置。 7. 验证开发板硬件是否正常工作。 8. 查找固件库的更新版本或寻求社区帮助。希望这些建议能帮助你解决问题。

2024-5-7 18:18:06 评论举报敷衍作笑谈