本帖最后由 nuc990 于 2017-6-3 19:39 编辑
在开发板目录：STM32Cube_FW_L0_V1.8.0\Projects\STM32L053C8-Discovery\Examples\LPTIM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？
/**
******************************************************************************
* [url=home.php?mod=space&uid=288409]@file[/url] LPTIM/LPTIM_Timeout/Src/main.c
* [url=home.php?mod=space&uid=187600]@author[/url] MCD Application Team
* [url=home.php?mod=space&uid=895143]@version[/url] V1.8.0
* [url=home.php?mod=space&uid=212281]@date[/url] 25-November-2016
* [url=home.php?mod=space&uid=247401]@brief[/url] This example describes how to implement a low power timeout to
* wake-up the system using the LPTIMER, through the STM32L0xx HAL API.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* 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();
}
}
/**
* [url=home.php?mod=space&uid=247401]@brief[/url] 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 %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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