使用的開發板為MINISTM32
通過長按數秒KEY_UP 按鍵開機，並且通過 DS1 的閃爍指示程序已經開始運行，再次長按該鍵，則進入待機模式，
DS1 關閉，程序停止運行。利用STM32的standby模式來實行類似於手機的開關機。
剛下載完時候是處於standby模式。
代碼修改如下：
/** ****************************************************************************** * File Name : main.c * Description : Main program body ****************************************************************************** ** This notice applies to any and all portions of this file * that are not between comment pairs USER CODE BEGIN and * USER CODE END. Other portions of this file, whether * inserted by the user or by software development tools * are owned by their respective copyright owners. * * COPYRIGHT(c) 2017 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" #include "stm32f1xx_hal.h" /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ /* Private variables ---------------------------------------------------------*/ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); /* USER CODE BEGIN PFP */ /* Private function prototypes -----------------------------------------------*/ /* USER CODE END PFP */ /* USER CODE BEGIN 0 */ /** * @brief This function configures the system to enter Standby mode for * current consumption measurement purpose. * STANDBY Mode * ============ * - Backup SRAM and RTC OFF * - IWDG and LSI OFF * - Wakeup using WakeUp Pin (PA.00) * @param None * @retval None */ void StandbyMode_Measure(void) { /* Enable Power Clock*/ __HAL_RCC_PWR_CLK_ENABLE(); /* Allow access to Backup */ HAL_PWR_EnableBkUpAccess(); /* Reset RTC Domain */ __HAL_RCC_BACKUPRESET_FORCE(); __HAL_RCC_BACKUPRESET_RELEASE(); /* Disable all used wakeup sources: Pin1(PA.0) */ HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1); /* Clear all related wakeup flags */ __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); /* Re-enable all used wakeup sources: Pin1(PA.0) */ HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1); /*## Enter Standby Mode ####################################################*/ /* Request to enter STANDBY mode */ HAL_PWR_EnterSTANDBYMode(); } void Sys_Enter_Standby(void) { //關閉所有外設(根據實際情況寫) __HAL_RCC_APB2_FORCE_RESET();// // __HAL_RCC_GPIOC_CLK_DISABLE(); //__HAL_RCC_GPIOD_CLK_DISABLE(); //__HAL_RCC_GPIOA_CLK_DISABLE(); //__HAL_RCC_GPIOB_CLK_DISABLE(); StandbyMode_Measure();//進入待機模式 } uint8_t PWR_Check_Standby(void) { uint8_t press_cnt =0;//記錄按下的次數 uint8_t release_cnt =0;//記錄松開的次數 HAL_GPIO_WritePin(DS0_GPIO_Port, DS0_Pin, GPIO_PIN_RESET); while(1)//死循環，由return結束 { HAL_Delay(20);//延遲一段時間再檢測 if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0) == GPIO_PIN_SET) //檢測到按下按鍵 { press_cnt++;//記錄按下次數 release_cnt=0;//清除按鍵釋放記錄 if(press_cnt>=100)//按下時間足夠 { HAL_GPIO_WritePin(DS0_GPIO_Port, DS0_Pin, GPIO_PIN_SET); //printf("系統進入待機模式，按下WKUP可退出待機模式\n"); return 1;//檢測到按鍵被時間長按下 } } else { release_cnt++;//記錄釋放次數 if(release_cnt>5)//連續檢測到釋放超過5次 { HAL_GPIO_WritePin(DS0_GPIO_Port, DS0_Pin, GPIO_PIN_RESET); return 0;//按下時間太短，不是按鍵長按操作 } } } } void WKUP_Init(void) { GPIO_InitTypeDef GPIO_InitStruct; /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOA_CLK_ENABLE(); /*Configure GPIO pin : PA0 */ GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING; GPIO_InitStruct.Pull = GPIO_PULLDOWN; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); //檢查是否是正常開機 if(PWR_Check_Standby()==0) { Sys_Enter_Standby();//不是開機，進入待機模式 } /* EXTI interrupt init*/ HAL_NVIC_SetPriority(EXTI0_IRQn, 2, 2); HAL_NVIC_EnableIRQ(EXTI0_IRQn); } /* USER CODE END 0 */ 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(); /* USER CODE BEGIN 2 */ WKUP_Init(); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ HAL_GPIO_TogglePin(DS1_GPIO_Port, DS1_Pin); HAL_Delay(250); } /* USER CODE END 3 */ } /** System Clock Configuration */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct; RCC_ClkInitTypeDef RCC_ClkInitStruct; /**Initializes the CPU, AHB and APB busses clocks */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } /**Initializes the CPU, AHB and APB busses clocks */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } /**Configure the Systick interrupt time */ HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000); /**Configure the Systick */ HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK); /* SysTick_IRQn interrupt configuration */ HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0); } /** Configure pins as * Analog * Input * Output * EVENT_OUT * EXTI */ static void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct; /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOD_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /*Configure GPIO pin Output Level */ HAL_GPIO_WritePin(DS0_GPIO_Port, DS0_Pin, GPIO_PIN_RESET); /*Configure GPIO pin Output Level */ HAL_GPIO_WritePin(DS1_GPIO_Port, DS1_Pin, GPIO_PIN_RESET); /*Configure GPIO pin : DS0_Pin */ GPIO_InitStruct.Pin = DS0_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(DS0_GPIO_Port, &GPIO_InitStruct); /*Configure GPIO pin : DS1_Pin */ GPIO_InitStruct.Pin = DS1_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(DS1_GPIO_Port, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) { if(GPIO_Pin==GPIO_PIN_0)//PA0 { if(PWR_Check_Standby())//關機 { Sys_Enter_Standby();//進入待機模式 } } } /* USER CODE END 4 */ /** * @brief This function is executed in case of error occurrence. * @param None * @retval None */ void _Error_Handler(char * file, int line) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ 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 %d\r\n", file, line) */ /* USER CODE END 6 */ } #endif /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/