Cortex-M0新唐m052外部中断

只看该作者 · 2016-3-20 07:42

#include "register.h"  



int main(void)  

{  

    rREGWRPROT = 0x59;  //解锁  

    rREGWRPROT = 0x16;  

    rREGWRPROT = 0x88;   

    rPWRCON |= (0x1<<0); //使能晶振  

    while( (rCLKSTATUS & (0x1<<0)) == 0); //等待时钟稳定  



    rP1_PMD = 0x5555;  

    rP1_DOUT = 0xff;  

    rP3_IMD &= ~(0x1<<3); //下降沿触发中断     

    rDBNCECON = (0x1<<5) | (0xf); //采样周期为128*256个时钟  

    rP3_DBEN |= (0x1<<3);//防反弹使能  

    rP3_IEN |= (0x1<<3);  //使能下降沿中断  

    rNVIC_ISER |= (0x1<<3);   



    rREGWRPROT = 0x0;       //上锁  



    while(1)  

    {     



    }     

}  



void EINT1_IRQHandler(void)  

{  

        rP1_DOUT ^= 0xff;   

        rP3_ISRC = rP3_ISRC;         

}