C语言串口通信-源代码.doc
《C语言串口通信-源代码.doc》由会员分享,可在线阅读,更多相关《C语言串口通信-源代码.doc(13页珍藏版)》请在冰豆网上搜索。
#include
#include
#include
#include
#defineCOM232 0x2f8
#defineCOMINT 0x0b
#defineMaxBufLen 500
#definePort8259 0x20
#defineEofInt 0x20
staticint comportaddr;
staticcharintvectnum;
staticunsignedcharmaskb;
staticunsignedcharBuffer[MaxBufLen];
staticint CharsInBuf,CircIn,CircOut;
staticvoid(interruptfar*OldAsyncInt)();
staticvoidinterruptfarAsyncInt(void);
voidInit_COM(intComPortAddr,unsignedcharIntVectNum,intBaud,
unsignedcharData,unsignedcharStop,unsignedcharParity)
{
unsignedcharHigh,Low;
intf;
comportaddr=ComPortAddr;
intvectnum=IntVectNum;
CharsInBuf=0;CircIn=0;CircOut=0;
f=(Baud/100);
f=1152/f;High=f/256;
Low=f-High*256;
outp(ComPortAddr+3,0x80);
outp(ComPortAddr,Low);
outp(ComPortAddr+1,High);
Data=(Data-5)|((Stop-1)*4);
if(Parity==2)Data=Data|0x18;
elseif(Parity==1)Data=Data|0x8;
outp(ComPortAddr+3,Data);
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);
elseoutp(Port8259+1,maskb&0xf7);
}
staticvoidinterruptfarAsyncInt(void)
{
disable();
if(CharsInBuf Buffer[CircIn]=inp(comportaddr);
if(CircIn elseCircIn=0;
if(CircIn==CircOut)CircOut++;
elseCharsInBuf++;
enable();
outp(Port8259,EofInt);
}
voidRestore(void)
{
setvect(intvectnum,OldAsyncInt);
outp(Port8259+1,maskb);
}
intGetCharInBuf(unsignedchar*Char)
{
intFlag;
Flag=-1;
if(CharsInBuf>0)
{
(*Char)=Buffer[CircOut];
if(CircOut elseCircOut=0;
CharsInBuf--;
Flag=0;
}
returnFlag;
}
intSendChar(unsignedcharChar)
{
if((inp(comportaddr+5)&0x20)==0)return-1;
outp(comportaddr,Char);
return0;
}
main()
{
inti,c;
unsignedcharInChar;
Init_COM(COM232,COMINT,1200,8,1,0);
while
(1)
{
if(kbhit())
{if((InChar=getch())==27)break;
elsewhile(SendChar(InChar));
}
if(GetCharInBuf(&InChar)==0)
printf("%c",InChar);
}
Restore();
}
接收程序:
#include
#include
#include
#include
#include
#include
#defineRXD0//接收
#defineTXD0//发送
#defineLSB0//波特率调节低8位
#defineMSB1//波特率调节高8位
#defineIER1//中断起用寄存器
#defineIIR2//中断标识寄存器
#defineLCR3//线路控制寄存器
#defineMCR4//调制解调器控制寄存器
#defineLSR5//线路状态寄存器
#defineMSR6//调制解调器状态寄存器
#defineIERV1
#defineOUT20x08
#defineERTS2
#defineEDTR1
#defineEMPTY0X20
#defineREADY0X30
#defineICREG0X20
#defineIMASKREG0X21
#defineEOI0X20
#defineWAITCOUNT5000
#defineBUFFLEN2048//用于存储字符的数组的界
#defineALTE0X12
#defineALTQ0X10
#defineSER_BAUD_120096
#defineSER_BAUD_240048
#defineSER_BAUD_96000x0C
#defineSER_BAUD_192006
#defineSER_STOP_10/*/1stopbitpercharacter*/
#defineSER_STOP_24/*/2stopbitspercharacter*/
#defineSER_BITS_50/*/send5bitcharacters*/
#defineSER_BITS_61/*/send6bitcharacters*/
#defineSER_BITS_72/*/send7bitcharacters*/
#defineSER_BITS_83/*/send8bitcharacters*/
#defineSER_PARITY_NONE0/*/noparity*/
#defineSER_PARITY_ODD8/*/oddparity*/
#defineSER_PARITY_EVEN24/*/evenparity*/
intport;
intComNum;
unsignedportaddr;
unsignedportf;
unsignedintbaudtable[]={0x180,0xc0,0x60,0x30,0x18,0x0c,0x06};
unsignedcharparitytable[]={0x08,0x18,0x00,0x28,0x38};
unsignedcharbuffer[BUFFLEN];//recvbuf
intbuffin=0;
intbuffout=0;
intincount=0;
intoutcount=0;
voidinterrupt(*vect_com)(...);
voidputb(unsignedcharch)//writeachartotherecvbuf将中断得到的数据写到缓冲区
{
inttemp;
temp=buffin;
if(++buffin==BUFFLEN)
buffin=0;
if(buffin!
=buffout)
{buffer[buffin]=ch;
//printf("bufferin[%d]=%c",buffer[buffin]);
//getch();
}
else
buffin=temp;
};
unsignedchargetb()//readacharfromtherecvbuf
{
if(buffout!
=buffin)
{
if(++buffout==BUFFLEN)
buffout=0;
//printf("bufferout[%d]=%c",buffout,buffer[buffout]);
return(buffer[buffout]);
}
else
return(0xff);
};
/*unsignedcharsender(unsignedcharch)
{
outportb(portaddr2+TXD,ch);
printf("\nsenderoutportdata=%c\n",ch);
outcount++;
return
(1);
};
*/
voidinterruptreceiver(...)
{
unsignedcharch;
ch=inportb(portaddr+RXD);
putb(ch);
incount++;//记录接收了多少个数据。
outportb(ICREG,EOI);
};
voidSerInit(intbaud,intconfiguration)
{
disable();
outportb(portaddr+LCR,0x80);
outportb(portaddr+LSB,baud);
outportb(portaddr+MSB,0x00);
outportb(portaddr+LCR,configuration);
enable();
};
void