307 lines
9.1 KiB
C
307 lines
9.1 KiB
C
/**
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******************************************************************************
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* @file Examples_MIX/PWR/PWR_STOP/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F1xx PWR HAL API to enter
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* and exit the STOP with Low power regulator mode.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F1xx_MIX_Examples
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* @{
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*/
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/** @addtogroup PWR_STOP
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define LED_TOGGLE_DELAY 100
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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static __IO uint32_t TimingDelay;
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/* Private function prototypes -----------------------------------------------*/
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__STATIC_INLINE void SystemClock_Config(void);
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__STATIC_INLINE void SYSCLKConfig_FromSTOP(void);
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__STATIC_INLINE void SystemPower_Config(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F103xB HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure LED2 */
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BSP_LED_Init(LED2);
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/* Configure the system clock to 72 MHz */
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SystemClock_Config();
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/* User push-button (External lines 10 to 15) will be used to wakeup the system from STOP mode */
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BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
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/* Configure the system Power */
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SystemPower_Config();
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while (1)
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{
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/* Insert 5 second delay */
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HAL_Delay(5000);
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/* Turn off LED2 */
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BSP_LED_Off(LED2);
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/* Enter STOP with Low power regulator mode */
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HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
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/* ... STOP with Low power regulator mode ... */
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/* Configure system clock after wake-up from STOP: enable and select PLL as system clock source
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(PLL is disabled in STOP mode) */
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SYSCLKConfig_FromSTOP();
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 72000000
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* HCLK(Hz) = 72000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 2
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* APB2 Prescaler = 1
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* PLLMUL = 9
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* Flash Latency(WS) = 2
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* @param None
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Configure PLL ------------------------------------------------------*/
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/* PLL configuration: PLLCLK = HSE * PLLMUL = 8 * 9 = 72 MHz */
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/* PREDIV1 configuration: PREDIV1CLK = PLLCLK / HSEPredivValue = 72 / 1 = 72 MHz */
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/* Enable HSE and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
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RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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}
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/**
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* @brief System Power Configuration
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* The system Power is configured as follow :
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* + No IWDG
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* + Wakeup using EXTI Line (User push-button PC.13)
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* @param None
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* @retval None
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*/
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static void SystemPower_Config(void)
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{
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GPIO_InitTypeDef gpio_initstruct;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* Set all GPIO in analog state to reduce power consumption, except PC.13 */
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/* to keep user button interrupt enabled */
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/* Note: Debug using ST-Link is not possible during the execution of this */
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/* example because communication between ST-link and the device */
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/* under test is done through UART. All GPIO pins are disabled (set */
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/* to analog input mode) including UART I/O pins. */
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LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA |
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LL_APB2_GRP1_PERIPH_GPIOB |
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LL_APB2_GRP1_PERIPH_GPIOC |
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LL_APB2_GRP1_PERIPH_GPIOD |
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LL_APB2_GRP1_PERIPH_GPIOE);
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/* In HAL, following codes can be called instead of LL:
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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__HAL_RCC_GPIOC_CLK_ENABLE();
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__HAL_RCC_GPIOD_CLK_ENABLE();
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__HAL_RCC_GPIOE_CLK_ENABLE();
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*/
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gpio_initstruct.Mode = GPIO_MODE_ANALOG;
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gpio_initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
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gpio_initstruct.Pull = GPIO_NOPULL;
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gpio_initstruct.Pin = GPIO_PIN_All;
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HAL_GPIO_Init(GPIOB, &gpio_initstruct);
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HAL_GPIO_Init(GPIOD, &gpio_initstruct);
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HAL_GPIO_Init(GPIOE, &gpio_initstruct);
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/* Set all the GPIOC pin to analog except PC.13 */
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gpio_initstruct.Pin &= ~GPIO_PIN_13;
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HAL_GPIO_Init(GPIOC, &gpio_initstruct);
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/* Set all the GPIOA pin to analog except PA.05 (LED2) */
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gpio_initstruct.Pin &= (GPIO_PIN_All & ~GPIO_PIN_5);
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HAL_GPIO_Init(GPIOA, &gpio_initstruct);
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}
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/**
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* @brief Configures system clock after wake-up from STOP: enable PLL
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* and select PLL as system clock source.
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* @note RCC LL API is used in this case to allow MCU to wake-up as quick
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* as possible from STOP mode.
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* @param None
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* @retval None
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*/
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__STATIC_INLINE void SYSCLKConfig_FromSTOP(void)
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{
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/* Customize process using LL interface to improve the performance
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(wake-up time from STOP quicker in LL than HAL)*/
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/* HSE configuration and activation */
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LL_RCC_HSE_Enable();
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while(LL_RCC_HSE_IsReady() != 1) {};
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/* Main PLL activation */
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LL_RCC_PLL_Enable();
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while(LL_RCC_PLL_IsReady() != 1)
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{
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};
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/* SYSCLK activation on the main PLL */
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
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{
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};
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* Suspend tick */
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HAL_SuspendTick();
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/* Turn LED2 on */
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BSP_LED_On(LED2);
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while (1)
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{
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}
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}
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/**
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* @brief SYSTICK callback
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* @param None
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* @retval None
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*/
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void HAL_SYSTICK_Callback(void)
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{
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HAL_IncTick();
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if (TimingDelay != 0)
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{
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TimingDelay--;
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}
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else
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{
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/* Toggle LED2 */
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BSP_LED_Toggle(LED2);
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TimingDelay = LED_TOGGLE_DELAY;
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}
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}
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/**
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* @brief EXTI line detection callbacks
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* @param GPIO_Pin: Specifies the pins connected EXTI line
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* @retval None
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*/
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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
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{
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if (GPIO_Pin == USER_BUTTON_PIN)
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{
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/* Reconfigure LED2 */
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BSP_LED_Init(LED2);
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/* Switch on LED2 */
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BSP_LED_On(LED2);
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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