mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
synced 2025-05-06 19:29:19 +08:00
270 lines
8.3 KiB
C
270 lines
8.3 KiB
C
/**
|
|
******************************************************************************
|
|
* @file WWDG/WWDG_Example/Src/main.c
|
|
* @author MCD Application Team
|
|
* @brief This sample code shows how to use the STM32F413xx/STM32F423xx WWDG HAL API
|
|
* to update at regular period the WWDG counter and how to generate
|
|
* a software fault generating an MCU WWDG reset on expiry of a
|
|
* programmed time period.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© Copyright (c) 2017 STMicroelectronics.
|
|
* All rights reserved.</center></h2>
|
|
*
|
|
* This software component is licensed by ST under BSD 3-Clause license,
|
|
* the "License"; You may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at:
|
|
* opensource.org/licenses/BSD-3-Clause
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "main.h"
|
|
|
|
/** @addtogroup STM32F4xx_HAL_Examples
|
|
* @{
|
|
*/
|
|
|
|
/** @addtogroup WWDG_Example
|
|
* @{
|
|
*/
|
|
|
|
/* Private typedef -----------------------------------------------------------*/
|
|
/* Private define ------------------------------------------------------------*/
|
|
/* Private macro -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* WWDG handler declaration */
|
|
static WWDG_HandleTypeDef WwdgHandle;
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
static uint32_t TimeoutCalculation(uint32_t timevalue);
|
|
static void SystemClock_Config(void);
|
|
static void Error_Handler(void);
|
|
|
|
/* Private functions ---------------------------------------------------------*/
|
|
|
|
/**
|
|
* @brief Main program
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
int main(void)
|
|
{
|
|
uint32_t delay;
|
|
|
|
/* STM32F4xx HAL library initialization:
|
|
- Configure the Flash prefetch
|
|
- Systick timer is configured by default as source of time base, but user
|
|
can eventually implement his proper time base source (a general purpose
|
|
timer for example or other time source), keeping in mind that Time base
|
|
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
|
|
handled in milliseconds basis.
|
|
- Set NVIC Group Priority to 4
|
|
- Low Level Initialization
|
|
*/
|
|
HAL_Init();
|
|
|
|
/* Configure the system clock to 100 MHz */
|
|
SystemClock_Config();
|
|
|
|
/* Configure LED1, LED2, LED3 */
|
|
BSP_LED_Init(LED1);
|
|
BSP_LED_Init(LED2);
|
|
BSP_LED_Init(LED3);
|
|
|
|
/*##-1- Check if the system has resumed from WWDG reset ####################*/
|
|
if (__HAL_RCC_GET_FLAG(RCC_FLAG_WWDGRST) != RESET)
|
|
{
|
|
/* WWDGRST flag set: Turn LED1 on */
|
|
BSP_LED_On(LED1);
|
|
|
|
/* Insert 4s delay */
|
|
HAL_Delay(4000);
|
|
|
|
/* Prior to clear WWDGRST flag: Turn LED1 off */
|
|
BSP_LED_Off(LED1);
|
|
}
|
|
|
|
/* Clear reset flags in any case */
|
|
__HAL_RCC_CLEAR_RESET_FLAGS();
|
|
|
|
/* Configure User push-button */
|
|
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
|
|
|
|
/*##-2- Init & Start WWDG peripheral ######################################*/
|
|
/* WWDG clock counter = (PCLK1 (50MHz)/4096)/8) = 1525 Hz (~655 us)
|
|
WWDG Window value = 80 means that the WWDG counter should be refreshed only
|
|
when the counter is below 80 (and greater than 64/0x40) otherwise a reset will
|
|
be generated.
|
|
WWDG Counter value = 127, WWDG timeout = ~655 us * 64 = 42 ms */
|
|
WwdgHandle.Instance = WWDG;
|
|
WwdgHandle.Init.Prescaler = WWDG_PRESCALER_8;
|
|
WwdgHandle.Init.Window = 0x50;
|
|
WwdgHandle.Init.Counter = 0x7F;
|
|
WwdgHandle.Init.EWIMode = WWDG_EWI_DISABLE;
|
|
|
|
if (HAL_WWDG_Init(&WwdgHandle) != HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
Error_Handler();
|
|
}
|
|
|
|
/* calculate delay to enter window. Add 1ms to secure round number to upper number */
|
|
delay = TimeoutCalculation((WwdgHandle.Init.Counter-WwdgHandle.Init.Window) + 1) + 1;
|
|
|
|
/* Infinite loop */
|
|
while (1)
|
|
{
|
|
/* Toggle LED2 */
|
|
BSP_LED_Toggle(LED2);
|
|
|
|
/* Insert calculated delay */
|
|
HAL_Delay(delay);
|
|
|
|
if (HAL_WWDG_Refresh(&WwdgHandle) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Timeout calculation function.
|
|
* This function calculates any timeout related to
|
|
* WWDG with given prescaler and system clock.
|
|
* @param timevalue: period in term of WWDG counter cycle.
|
|
* @retval None
|
|
*/
|
|
static uint32_t TimeoutCalculation(uint32_t timevalue)
|
|
{
|
|
uint32_t timeoutvalue = 0;
|
|
uint32_t pclk1 = 0;
|
|
uint32_t wdgtb = 0;
|
|
|
|
/* considering APB divider is still 1, use HCLK value */
|
|
pclk1 = HAL_RCC_GetPCLK1Freq();
|
|
|
|
/* get prescaler */
|
|
wdgtb = (1 << ((WwdgHandle.Init.Prescaler) >> 7)); /* 2^WDGTB[1:0] */
|
|
|
|
/* calculate timeout */
|
|
timeoutvalue = ((4096 * wdgtb * timevalue) / (pclk1 / 1000));
|
|
|
|
return timeoutvalue;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief System Clock Configuration
|
|
* The system Clock is configured as follow :
|
|
* System Clock source = PLL (HSE)
|
|
* SYSCLK(Hz) = 100000000
|
|
* HCLK(Hz) = 100000000
|
|
* AHB Prescaler = 1
|
|
* APB1 Prescaler = 2
|
|
* APB2 Prescaler = 1
|
|
* HSE Frequency(Hz) = 8000000
|
|
* PLL_M = 8
|
|
* PLL_N = 200
|
|
* PLL_P = 2
|
|
* PLL_Q = 7
|
|
* PLL_R = 2
|
|
* VDD(V) = 3.3
|
|
* Main regulator output voltage = Scale1 mode
|
|
* Flash Latency(WS) = 3
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void SystemClock_Config(void)
|
|
{
|
|
RCC_ClkInitTypeDef RCC_ClkInitStruct;
|
|
RCC_OscInitTypeDef RCC_OscInitStruct;
|
|
HAL_StatusTypeDef ret = HAL_OK;
|
|
|
|
/* Enable Power Control clock */
|
|
__HAL_RCC_PWR_CLK_ENABLE();
|
|
|
|
/* The voltage scaling allows optimizing the power consumption when the device is
|
|
clocked below the maximum system frequency, to update the voltage scaling value
|
|
regarding system frequency refer to product datasheet. */
|
|
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
|
|
|
|
/* Enable HSE Oscillator and activate PLL with HSE as source */
|
|
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
|
|
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
|
|
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
|
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
|
|
RCC_OscInitStruct.PLL.PLLM = 8;
|
|
RCC_OscInitStruct.PLL.PLLN = 200;
|
|
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
|
|
RCC_OscInitStruct.PLL.PLLQ = 7;
|
|
RCC_OscInitStruct.PLL.PLLR = 2;
|
|
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
|
|
|
|
if(ret != HAL_OK)
|
|
{
|
|
while(1) { ; }
|
|
}
|
|
|
|
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
|
|
clocks dividers */
|
|
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | 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;
|
|
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
|
|
if(ret != HAL_OK)
|
|
{
|
|
while(1) { ; }
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief This function is executed in case of error occurrence.
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void Error_Handler(void)
|
|
{
|
|
/* Turn LED3 on */
|
|
BSP_LED_On(LED3);
|
|
|
|
while(1)
|
|
{
|
|
}
|
|
}
|
|
|
|
#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 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) */
|
|
|
|
/* Infinite loop */
|
|
while (1)
|
|
{
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|