c语言串口通信范例文档格式.docx
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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)
if(CharsInBuf<
MaxBufLen)
Buffer[CircIn]=inp(comportaddr);
if(CircIn<
MaxBufLen-1)CircIn++;
elseCircIn=0;
if(CircIn==CircOut)CircOut++;
elseCharsInBuf++;
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<
MaxBufLen-1)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<
fstream.h>
stdlib.h>
math.h>
#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_)(...);
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]);
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();
voidSerOpen(void)
vect_=getvect(portf+8);
inportb(portaddr+RXD);
inportb(portaddr+MSR);
inportb(portaddr+LSR);
inportb(portaddr+IIR);
outportb(portaddr+IER,IERV);
outportb(portaddr+MCR,OUT2|ERTS|EDTR);
outportb(IMASKREG,inportb(IMASKREG)&
(~(1<
<
portf)));
setvect(portf+8,receiver);
voidSerClose(void)
outportb(portaddr+IER,0);
outportb(portaddr+MCR,0);
outportb(IMASKREG,inportb(IMASKREG)|(1<
portf));
setvect(portf+8,vect_);
voidGetportaddr(intport)
switch(port)
case0:
portaddr=0x3F8;
break;
case1:
portaddr=0x2F8;
case2:
portaddr=0x3E8;
case3:
portaddr=0x2E8;
portf=(port==0)?
4:
3;
voidInt()
unsignedcharkey,key2;
port=ComNum-1;
if(peek(0x40,port*2)==0)
printf("
havenospecial.\n"
);
exit
(1);
}
Theusedportis:
COM%d\n"
ComNum);
Getportaddr(port);
//得到串口地址
SerInit(SER_BAUD_9600,SER_PARITY_EVEN|SER_BITS_8|SER_STOP_1);
//初始化串口,设置波特率等
SerOpen();
do
if(kbhit())
key2=getch();
if(key2==27){break;
};
key=getb();
if(key!
=0xff)
%x\t"
key);
FILE*fp;
fp=fopen("
C:
\\Receivedata.dat"
"
ab"
//可选择接收数据的存放文件路径和文件名
if(fp==NULL)printf("
Fileopenerror!
"
//fputc(key,fp);
fwrite(&
key,sizeof(unsignedchar),1,fp);
fclose(fp);
}while(key2!
=27);
SerClose();
//printf("
%dcharhasbeenreceived\n"
incount);
%dcharhasbeensended\n"
outcount);
\nsum=%d\n"
sum);
voidmain()//com1receive
PleaseinputthereceiveCOMnum:
(1~4)\n"
cin>
>
ComNum;
thecurrentsetis:
9600,even,databits8,stop1,"
Int();
\n\nOVER\n"
exit(0);
---------------
发送文件程序
bios.h>
graphics.h>
#ifdef__cplusplus
#define__CPPARGS...
#else
#define__CPPARGS
#endif
#defineSER_RBF0
#defineSER_THR0
#defineSER_IER1
#defineSER_IIR2
#defineSER_LCR3
#defineSER_MCR4
#defineSER_LSR5
#defineSER_MSR6
#defineSER_DLL0
#defineSER_DLH1
#defineSER_BAUD_960012
#defineSER_GP028
#defineCOM_10x3F8
#defineCOM_20x2F8/*/baseportaddressofport1*/
#defineCOM_30x3E8
#defineCOM_40x2E8
#defineSER_DIV_LATCH_ON128/*/usedtoturnreg0,1intodivisorlatch*/
#definePIC_IMR0x21/*/pic'
sinterruptmaskreg.*/
#definePIC_ICR0x20/*/pic'
sinteruptcontrolreg.*/
#defineINT_SER_PORT_00x0C/*/port0interrupt1&
3*/
#defineINT_SER_PORT_10x0B/*/port0interrupt2&
4*/
#defineSERIAL_BUFF_SIZE128/*/currentsizeofcirculatingreceivebuffer*/
voidinterruptfar(*Old_Isr)(__CPPARGS);
/*/holdsoldportinterrupthandler*/
charser_buffer[SERIAL_BUFF_SIZE];
/*/thereceivebuffer*/
intser_end=-1,ser_start=-1;
/*/indexesintoreceivebuffer*/
intser_ch,char_ready=0;
/*/currentcharacterandreadyflag*/
intold_int_mask;
/*/theoldinterruptmaskonthePIC*/
intopen_port;
/*/thecurrentlyopenport*/
intserial_lock=0;
/*/serialISRsemaphoresothebuffer*/
/*/isn'
talteredwillitisbeingwritten*/
/*/tobytheISR*/
/*-------------写串口-----------------*/
voidinterruptfarSerial_Isr(__CPPARGS)
serial_lock=1;
ser_ch=inp(open_port+SER_RBF);
if(++ser_end>
SERIAL_BUFF_SIZE-1)
ser_end=0;
ser_buffer[ser_end]=ser_ch;
++char_ready;
outp(PIC_ICR,0x20);
serial_lock=0;
}
intReady_Serial()
return(char_ready);
/*--------------读串口--------------*/
intSerial_Read()
intch;
while(serial_lock){}
if(ser_end!
=ser_start)
if(++ser_start>
ser_start=0;
ch=ser_buffer[ser_start];
%x"
if(char_ready>
0)
--char_ready;
return(ch);
}
return(0);
/*--------------写串口-----------------*/
Serial_Write(charch)
while(!
(inp(open_port+SER_LSR)&
0x20)){}
asmcli
outp(open_port