333 lines
9.4 KiB
C
333 lines
9.4 KiB
C
/**
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******************************************************************************
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* @file Examples_LL/RTC/RTC_Tamper/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F1xx RTC LL API
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* to write/read data to/from RTC Backup data registers and demonstrates
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* the Tamper detection feature.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 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 RTC_Tamper
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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 BACKUP_COUNT RTC_BKP_NUMBER
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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__IO FlagStatus TamperStatus;
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/* Backup registers table */
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uint32_t aBKPDataReg[BACKUP_COUNT] =
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{
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LL_RTC_BKP_DR1, LL_RTC_BKP_DR2, LL_RTC_BKP_DR3,
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LL_RTC_BKP_DR4, LL_RTC_BKP_DR5, LL_RTC_BKP_DR6,
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LL_RTC_BKP_DR7, LL_RTC_BKP_DR8, LL_RTC_BKP_DR9,
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LL_RTC_BKP_DR10,
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};
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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void Configure_RTC(void);
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void Configure_RTC_Tamper(void);
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void LED_Init(void);
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void LED_On(void);
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void LED_Blinking(uint32_t Period);
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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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register uint32_t index = 0;
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/* Configure the system clock to 120 MHz */
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SystemClock_Config();
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/* Initialize LED1 */
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LED_Init();
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/* Configure the RTC peripheral */
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Configure_RTC();
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/* Configure RTC Tamper */
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Configure_RTC_Tamper();
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/* Write Data on the Back Up registers */
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for (index = 0; index < BACKUP_COUNT; index++)
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{
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LL_RTC_BKP_SetRegister(BKP, aBKPDataReg[index], 0xDF59 + (index * 0x5A));
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}
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/* Check Data is stored on the Back Up registers */
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for (index = 0; index < BACKUP_COUNT; index++)
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{
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if (LL_RTC_BKP_GetRegister(BKP, aBKPDataReg[index]) != (0xDF59 + (index * 0x5A)))
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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}
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/* Reset flag after writing of backup register in order to wait for new button press */
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TamperStatus = RESET;
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/* Wait for Tamper detection */
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while(TamperStatus != SET)
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{
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LL_GPIO_TogglePin(LED1_GPIO_PORT, LED1_PIN);
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LL_mDelay(LED_BLINK_FAST);
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}
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/* LED1 On: Tamper button pressed */
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LED_On();
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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 Configure RTC.
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* @param None
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* @retval None
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*/
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void Configure_RTC(void)
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{
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/* Enables the PWR Clock and Enables access to the backup domain */
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR | LL_APB1_GRP1_PERIPH_BKP);
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LL_PWR_EnableBkUpAccess();
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/* Enable RTC Clock */
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LL_RCC_EnableRTC();
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}
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/**
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* @brief Configure the current time and date and activate Tamper.
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* @note Peripheral configuration is minimal configuration from reset values.
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* Thus, some useless LL unitary functions calls below are provided as
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* commented examples - setting is default configuration from reset.
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* @param None
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* @retval None
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*/
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void Configure_RTC_Tamper(void)
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{
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/* Sampling frequency */
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/* Reset value is LL_RTC_TAMPER_SAMPLFREQDIV_32768 */
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//LL_RTC_TAMPER_SetSamplingFreq(RTC, LL_RTC_TAMPER_SAMPLFREQDIV_32768);
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/* Precharge duration */
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/* Reset value is LL_RTC_TAMPER_DURATION_1RTCCLK */
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//LL_RTC_TAMPER_SetPrecharge(RTC, LL_RTC_TAMPER_DURATION_1RTCCLK);
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/* Enable Pull up */
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/* Reset value is pull-up enabled */
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//LL_RTC_TAMPER_EnablePullUp(RTC);
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/* Disable timestamp on tamper detection */
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/* Reset value is timestamp on tamper disabled */
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//LL_RTC_TS_DisableOnTamper(RTC);
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/* Set Tamper trigger to falling edge */
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/* Reset value is LL_RTC_TAMPER_FILTER_DISABLE */
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//LL_RTC_TAMPER_SetFilterCount(RTC, LL_RTC_TAMPER_FILTER_DISABLE);
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LL_RTC_TAMPER_SetActiveLevel(BKP, LL_RTC_TAMPER_ACTIVELEVEL_LOW);
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/* Enable tamper detection */
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LL_RTC_TAMPER_Enable(BKP);
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/* Enable IT TAMPER */
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LL_RTC_EnableIT_TAMP(BKP);
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/* Configure the NVIC for RTC Tamper */
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NVIC_SetPriority(TAMPER_IRQn, 0x0F);
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NVIC_EnableIRQ(TAMPER_IRQn);
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/* Clear the Tamper interrupt pending bit */
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LL_RTC_ClearFlag_TAMPI(BKP);
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}
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/**
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* @brief Initialize LED1.
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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 LED1 Clock */
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LED1_GPIO_CLK_ENABLE();
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/* Configure IO in output push-pull mode to drive external LED1 */
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LL_GPIO_SetPinMode(LED1_GPIO_PORT, LED1_PIN, LL_GPIO_MODE_OUTPUT);
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/* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
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//LL_GPIO_SetPinOutputType(LED1_GPIO_PORT, LED1_PIN, LL_GPIO_OUTPUT_PUSHPULL);
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/* Reset value is LL_GPIO_SPEED_FREQ_LOW */
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//LL_GPIO_SetPinSpeed(LED1_GPIO_PORT, LED1_PIN, LL_GPIO_SPEED_FREQ_LOW);
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/* Reset value is LL_GPIO_PULL_NO */
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//LL_GPIO_SetPinPull(LED1_GPIO_PORT, LED1_PIN, LL_GPIO_PULL_NO);
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}
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/**
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* @brief Turn-on LED1.
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* @param None
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* @retval None
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*/
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void LED_On(void)
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{
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/* Turn LED1 on */
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LL_GPIO_SetOutputPin(LED1_GPIO_PORT, LED1_PIN);
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}
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/**
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* @brief Set LED1 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter).
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* @param Period : Period of time (in ms) between each toggling of LED
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* This parameter can be user defined values. Pre-defined values used in that example are :
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* @arg LED_BLINK_FAST : Fast Blinking
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* @arg LED_BLINK_SLOW : Slow Blinking
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* @arg LED_BLINK_ERROR : Error specific Blinking
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* @retval None
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*/
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void LED_Blinking(uint32_t Period)
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{
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/* Toggle IO in an infinite loop */
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while (1)
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{
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LL_GPIO_TogglePin(LED1_GPIO_PORT, LED1_PIN);
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LL_mDelay(Period);
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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) = 120000000
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* HCLK(Hz) = 120000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSI Frequency(Hz) = 80000000
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* PLL_M = 8
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* PLL_N = 240
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* PLL_P = 2
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 3
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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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/******************************************************************************/
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/* USER IRQ HANDLER TREATMENT */
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/******************************************************************************/
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/**
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* @brief Tamper event callback function
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* @param None
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* @retval None
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*/
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void Tamper_Callback(void)
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{
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register uint32_t index = 0;
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/* Deactivate the tamper */
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LL_RTC_TAMPER_Disable(BKP);
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/* Check Data is cleared on the Back Up registers */
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for (index = 0; index < BACKUP_COUNT; index++)
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{
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if (LL_RTC_BKP_GetRegister(BKP, aBKPDataReg[index]) != 0x00)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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}
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TamperStatus = SET;
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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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