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https://github.com/STMicroelectronics/STM32CubeF0.git
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337 lines
11 KiB
C
337 lines
11 KiB
C
/**
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******************************************************************************
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* @file IWDG/IWDG_Reset/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use the STM32F0xx IWDG HAL API
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* to update at regular period the IWDG counter and how to simulate
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* a software fault generating an MCU IWDG reset on expiry of a
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* programmed time period.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 STM32F0xx_HAL_Examples
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* @{
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*/
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/** @addtogroup IWDG_Example
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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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/* IWDG and TIM handlers declaration */
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static IWDG_HandleTypeDef IwdgHandle;
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TIM_HandleTypeDef Input_Handle;
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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uint16_t tmpCC4[2] = {0, 0};
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__IO uint32_t uwLsiFreq = 0;
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__IO uint32_t uwCaptureNumber = 0;
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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void Error_Handler(void);
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static uint32_t GetLSIFrequency(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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/* STM32F0xx 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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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 48 MHz */
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SystemClock_Config();
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/* Configure LED3, LED4, LED5 */
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BSP_LED_Init(LED3);
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BSP_LED_Init(LED4);
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BSP_LED_Init(LED5);
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/* Configure User push-button */
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BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
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/*##-1- Check if the system has resumed from IWDG reset ####################*/
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if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST) != RESET)
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{
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/* IWDGRST flag set: Turn LED3 on */
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BSP_LED_On(LED3);
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/* Insert 4s delay */
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HAL_Delay(4000);
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/* Notification done: Turn LED3 off */
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BSP_LED_Off(LED3);
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}
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/* Clear reset flags in any cases */
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__HAL_RCC_CLEAR_RESET_FLAGS();
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/*##-2- Get the LSI frequency: TIM14 is used to measure the LSI frequency ###*/
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uwLsiFreq = GetLSIFrequency();
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/*##-3- Configure & Start the IWDG peripheral #########################################*/
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/* Set counter reload value to obtain 1 sec. IWDG TimeOut.
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IWDG counter clock Frequency = uwLsiFreq
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Set Prescaler to 32 (IWDG_PRESCALER_32)
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Timeout Period = (Reload Counter Value * 32) / uwLsiFreq
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So Set Reload Counter Value = (1 * uwLsiFreq) / 32 */
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IwdgHandle.Instance = IWDG;
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IwdgHandle.Init.Prescaler = IWDG_PRESCALER_32;
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IwdgHandle.Init.Reload = (uwLsiFreq / 32);
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IwdgHandle.Init.Window = IWDG_WINDOW_DISABLE;
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if(HAL_IWDG_Init(&IwdgHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Infinite loop */
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while (1)
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{
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/* Toggle LED4 */
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BSP_LED_Toggle(LED4);
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/* Insert 990 ms delay */
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HAL_Delay(990);
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/* Refresh IWDG: reload counter */
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if(HAL_IWDG_Refresh(&IwdgHandle) != HAL_OK)
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{
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/* Refresh Error */
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Error_Handler();
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}
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}
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}
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/**
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* @brief Configures TIM14 to measure the LSI oscillator frequency.
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* @param None
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* @retval LSI Frequency
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*/
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static uint32_t GetLSIFrequency(void)
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{
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TIM_IC_InitTypeDef TIMInput_Config;
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/* Configure the TIM peripheral *********************************************/
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/* Set TIMx instance */
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Input_Handle.Instance = TIM14;
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/* TIM14 configuration: Input Capture mode ---------------------
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The LSI oscillator is connected to TIM14 CH1.
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The Rising edge is used as active edge.
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The TIM14 CCR1 is used to compute the frequency value.
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------------------------------------------------------------ */
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Input_Handle.Init.Prescaler = 0;
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Input_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
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Input_Handle.Init.Period = 0xFFFF;
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Input_Handle.Init.ClockDivision = 0;
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Input_Handle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
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if(HAL_TIM_IC_Init(&Input_Handle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Connect internally the TIM14_CH1 Input Capture to the LSI clock output */
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HAL_TIMEx_RemapConfig(&Input_Handle, TIM_TIM14_MCO);
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/* Connect internally the MCO to LSI */
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HAL_RCC_MCOConfig(RCC_MCO, RCC_MCO1SOURCE_LSI, RCC_MCODIV_1);
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/* Configure the Input Capture of channel 1 */
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TIMInput_Config.ICPolarity = TIM_ICPOLARITY_RISING;
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TIMInput_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
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TIMInput_Config.ICPrescaler = TIM_ICPSC_DIV8;
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TIMInput_Config.ICFilter = 0;
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if(HAL_TIM_IC_ConfigChannel(&Input_Handle, &TIMInput_Config, TIM_CHANNEL_1) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Start the TIM Input Capture measurement in interrupt mode */
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if(HAL_TIM_IC_Start_IT(&Input_Handle, TIM_CHANNEL_1) != HAL_OK)
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{
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Error_Handler();
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}
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/* Wait until the TIM14 get 2 LSI edges */
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while(uwCaptureNumber != 2)
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{
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}
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/* Disable TIM14 CC1 Interrupt Request */
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HAL_TIM_IC_Stop_IT(&Input_Handle, TIM_CHANNEL_1);
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/* Deinitialize the TIM14 peripheral registers to their default reset values */
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HAL_TIM_IC_DeInit(&Input_Handle);
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return uwLsiFreq;
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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 (HSI48)
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* SYSCLK(Hz) = 48000000
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* HCLK(Hz) = 48000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 1
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* HSI Frequency(Hz) = 48000000
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* PREDIV = 2
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* PLLMUL = 2
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* Flash Latency(WS) = 1
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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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/* Select HSI48 Oscillator as PLL source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
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RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI48;
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RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;
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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 and PCLK1 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
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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.APB1CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= 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 Input Capture callback in non blocking mode
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* @param htim : TIM IC handle
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* @retval None
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*/
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void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
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{
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uint32_t lsiperiod = 0;
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/* Get the Input Capture value */
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tmpCC4[uwCaptureNumber++] = HAL_TIM_ReadCapturedValue(&Input_Handle, TIM_CHANNEL_1);
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if (uwCaptureNumber >= 2)
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{
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/* Compute the period length */
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lsiperiod = (uint16_t)(0xFFFF - tmpCC4[0] + tmpCC4[1] + 1);
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/* Frequency computation */
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uwLsiFreq = (uint32_t) SystemCoreClock / lsiperiod;
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uwLsiFreq *= 8;
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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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/* Turn LED5 on */
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BSP_LED_On(LED5);
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while(1)
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{
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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(char *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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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