www.pudn.com > nxplpc2204bsp.rar > smartarm.c

#include "mytypes.h" 
#include "lpc2210.h" 
#include "smartarm.h" 
 
void IRQ_Eint3(void) 
{ 
    DWORD  i = IO0PIN;                          /* 读取当前B1控制值*/ 
						 
    if( (i&BEEPCON)==0 )				/* 控制B1输出取反    */ 
    {           
        IO0SET = BEEPCON;     
    }     
    else 
    { 
        IO0CLR = BEEPCON;     
    }     
    EXTINT = 0x08; 
}