STM32F429 >> 8. 系统定时器

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本工程板级支持包文件适用于野火stm32f429 开发板。

bsp_systick.c

/**
  ******************************************************************************
  * @file    bsp_systick.c
  * @author  Waao
  * @version V1.0.0
  * @date    22-Dec-2018
  * @brief   This file contains some board support package's functions for the configuration of the SysTick.
  *            
  ******************************************************************************
  * @attention
  *
  * None
	*
  ******************************************************************************
  */

#include <bsp_systick.h>


__IO uint32_t TimingDelay;

/**
  * @brief  Configure the NVIC
  * @param  None
  * @retval None
  */
void SysTick_Init(void)
{
	/*SysTick_Config(): This function will do most of the essential work of the Initialization of the SysTick for us.
	 *                  We just need to configure the length of time the interrupt was triggered.
	 */
	while(SysTick_Config(SystemCoreClock / 100000) != 0);
}
	

/**
  * @brief  Delay
  * @param  times : While generate a interrupt, the times that SysTick turn to 0 you want.
  * @retval None
  */
void Delay(uint32_t times)
{
	TimingDelay = times;
	while(TimingDelay != 0);
}

/**
  * @brief  Waiting the TimingDelay decrease to 0
  * @param  None
  * @retval None
  */
void TimingDelay_Decrease(void)
{
	if(TimingDelay != 0)
	{
		TimingDelay--;
	}
}

bsp_systick.h

/**
  ******************************************************************************
  * @file    bsp_systick.c
  * @author  Waao
  * @version V1.0.0
  * @date    22-Dec-2018
  * @brief   This file contains some board support package's functions for the configuration of the SysTick.
  *            
  ******************************************************************************
  * @attention
  *
  * None
	*
  ******************************************************************************
  */

#ifndef __BSP_SYSTICK_H_
#define	__BSP_SYSTICK_H_

#include <stm32f4xx.h>

void SysTick_Init(void);
void Delay(uint32_t times);
void TimingDelay_Decrease(void);

#endif

stm32f4xx_it.c

/**
  * @brief  This function handles SysTick Handler.
  * @param  None
  * @retval None
  */
void SysTick_Handler(void)
{
	TimingDelay_Decrease();
}

main.c

#include <bsp_exti.h>
#include <bsp_key.h>
#include <bsp_led.h>
#include <bsp_systick.h>


int main(void)
{
	LED_GPIO_Config();
	LED2_OFF;
	LED3_OFF
	SysTick_Init();
	while(1)
	{
		LED1_TOGGLE;
		Delay(100000);
	}
}