/*-------------------------------------------------------
定時器捕獲試驗??trig接PE8?echo接?PE10?由定時器捕獲echo引腳的
上升沿，定時器計數(shù)，時鐘設(shè)置為???MHz??????????????庫函數(shù)版

注意：注意stm32F1系列與stm32F4系列的差別

written?by?huhan???????????this?project?has?finished
-------------------------------------------------------*/
#include?“stm32f4xx.h“
#include?“stm32f4xx_tim.h“
#include?“stm32f4xx_gpio.h“
//#include?“stm32f4xx_syscfg.h“
#include?“stm32f4xx_rcc.h“


typedef?unsigned?int?uint;
typedef?unsigned?char?uchar;
typedef?unsigned?long?ulong;

ulong?temp;
static?uchar??fac_us=0;//us延時倍乘數(shù)
static?u16?fac_ms=0;//ms延時倍乘數(shù)


/*-----------------------------函數(shù)聲明-----------------------------*/
void?TIM3_init（uint?arruint?psc）;
void?GPIO_init（）;


void?delay_init（）	?
{
	SysTick_CLKSourceConfig（SysTick_CLKSou