C语言串口通信-源代码(2)

C语言串口通信-源代码

outp(ComPortAddr+4,0x0a);

outp(ComPortAddr+1,0x01);

disable(); OldAsyncInt=getvect( IntVectNum ); setvect( IntVectNum, AsyncInt ); enable();

maskb=inp(Port8259+1);

if(IntVectNum==0x0c)outp(Port8259+1,maskb&0xef);

else outp(Port8259+1,maskb&0xf7); }

static void interrupt far AsyncInt(void)

{

disable();

if(CharsInBuf<MaxBufLen)

Buffer[CircIn]=inp(comportaddr);

if(CircIn<MaxBufLen-1) CircIn++;

else CircIn=0;

if(CircIn==CircOut) CircOut++;

else CharsInBuf++;

enable();

outp(Port8259,EofInt);

}

void Restore(void)

{

setvect(intvectnum,OldAsyncInt);

outp(Port8259+1,maskb);

}

int GetCharInBuf(unsigned char *Char)

{

int Flag;

Flag=-1;

if(CharsInBuf>0)

{