这个是arm Cortex-M0新唐m052外部中断
- #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;
- }
| 
楼主
