#define SYSCLK_FREQ 72000000

void SysTick_Configuration(void)
{
//會產(chǎn)生1ms 時間基準(zhǔn)
SysTick_Config(SYSCLK_FREQ / 1000); //1ms
}

void SysTick_Handler(void)
{
//1ms中斷進(jìn)入一次
}