267 lines
7.5 KiB
C
267 lines
7.5 KiB
C
/**
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******************************************************************************
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* @file Examples_LL/PWR/PWR_EnterStopMode/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to enter and exit the STOP_MAINREGU mode
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* through the STM32F1xx PWR LL API.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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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_LL_Examples
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* @{
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*/
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/** @addtogroup PWR_EnterStopMode
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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void Configure_PWR(void);
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void LED_Init(void);
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void LED_Off(void);
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void LED_Blinking_5s(void);
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void EnterSTOP_MAINREGUMode(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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/* Configure the system clock to 72 MHz */
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SystemClock_Config();
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/* Initialize LED2 */
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LED_Init();
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/* Configure Power IP */
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Configure_PWR();
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/* Led blinking during 5s in RUN mode */
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LED_Blinking_5s();
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/* Switch OFF LED2 */
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LED_Off();
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/* Enter STOP_MAINREGU mode */
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EnterSTOP_MAINREGUMode();
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/* Here Device is in STOP_MAINREGU mode */
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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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/**
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* @brief Initialize LED2.
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* @param None
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* @retval None
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*/
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void LED_Init(void)
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{
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/* Enable the LED2 Clock */
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LED2_GPIO_CLK_ENABLE();
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/* Configure IO in output push-pull mode to drive external LED2 */
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LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
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/* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
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//LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL);
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/* Reset value is LL_GPIO_SPEED_FREQ_LOW */
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//LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW);
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/* Reset value is LL_GPIO_PULL_NO */
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//LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_NO);
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}
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/**
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* @brief Turn-off LED2.
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* @param None
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* @retval None
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*/
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void LED_Off(void)
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{
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/* Turn LED2 off */
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LL_GPIO_ResetOutputPin(LED2_GPIO_PORT, LED2_PIN);
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}
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/**
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* @brief Set LED2 to Blinking mode during 5s.
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* @param None
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* @retval None
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*/
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void LED_Blinking_5s(void)
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{
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uint32_t i = 0;
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/* Toggle IO in during 5s (25*200ms) */
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for(i = 0; i < 25; i++)
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{
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LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
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LL_mDelay(200);
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}
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}
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/**
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* @brief Function to configure and initialize PWR IP.
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* @param None
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* @retval None
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*/
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void Configure_PWR(void)
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{
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/* Enable Power Clock */
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
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}
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/**
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* @brief Function to configure and enter in STOP_MAINREGU Mode.
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* @param None
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* @retval None
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*/
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void EnterSTOP_MAINREGUMode(void)
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{
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LL_GPIO_InitTypeDef gpio_initstruct = {LL_GPIO_PIN_ALL, LL_GPIO_MODE_ANALOG,
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LL_GPIO_SPEED_FREQ_HIGH, LL_GPIO_OUTPUT_PUSHPULL};
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/* Set all GPIO in analog state to reduce power consumption, */
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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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LL_GPIO_Init(GPIOA, &gpio_initstruct);
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LL_GPIO_Init(GPIOB, &gpio_initstruct);
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LL_GPIO_Init(GPIOC, &gpio_initstruct);
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LL_GPIO_Init(GPIOD, &gpio_initstruct);
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LL_GPIO_Init(GPIOE, &gpio_initstruct);
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LL_APB2_GRP1_DisableClock(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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/** Request to enter STOP_MAINREGU mode
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* Following procedure describe in STM32F1xx Reference Manual
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* See PWR part, section Low-power modes, STOP_MAINREGU mode
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*/
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/* Set STOP_MAINREGU mode when CPU enters deepsleep */
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LL_PWR_SetPowerMode(LL_PWR_MODE_STOP_MAINREGU);
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/* Set SLEEPDEEP bit of Cortex System Control Register */
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LL_LPM_EnableDeepSleep();
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/* Request Wait For Interrupt */
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__WFI();
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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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* HSE Frequency(Hz) = 8000000
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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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/* Set FLASH latency */
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LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
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/* Enable HSE oscillator */
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LL_RCC_HSE_EnableBypass();
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LL_RCC_HSE_Enable();
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while(LL_RCC_HSE_IsReady() != 1)
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{
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};
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/* Main PLL configuration and activation */
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LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE_DIV_1, LL_RCC_PLL_MUL_9);
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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_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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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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/* Set APB1 & APB2 prescaler*/
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
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LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
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/* Set systick to 1ms in using frequency set to 72MHz */
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LL_Init1msTick(72000000);
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/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
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LL_SetSystemCoreClock(72000000);
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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", 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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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