c语言串口通信范例.docx
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- 上传时间:2023-01-25
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c语言串口通信范例.docx
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c语言串口通信范例
一个c语言的串口通信程序范例
标签:
c语言
串口通信
通信程序
it
分类:
技术笔记
最近接触一个项目,用HL-C1C激光位移传感器+易控组态软件完成生产线高度跳变检测,好久没有接触cc#,一些资料,找来做个记录,也许大家用的着
#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(); }; voidSerOpen(void) { vect_com=getvect(portf+8); disable(); 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< setvect(portf+8,receiver); enable(); }; voidSerClose(void) { disable(); outportb(portaddr+IER,0); outportb(portaddr+MCR,0); outportb(IMASKREG,inportb(IMASKREG)|(1< enable(); setvect(portf+8,vect_com); }; voidGetportaddr(intport) { switch(port) { case0: portaddr=0x3F8;break; case1: portaddr=0x2F8;break; case2: portaddr=0x3E8;break; case3: portaddr=0x2E8;break; } portf=(port==0)? 4: 3; }; voidInt() { unsignedcharkey,key2; port=ComNum-1; if(peek(0x40,port*2)==0) { printf("havenospecialcom.\n"); exit (1); } else { printf("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) { printf("%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); //printf("%dcharhasbeensended\n",outcount); //printf("\nsum=%d\n",sum); } voidmain()//com1receive { printf("PleaseinputthereceiveCOMnum: (1~4)\n"); cin>>ComNum; printf("thecurrentcomsetis: 9600,even,databits8,stop1,"); Int(); printf("\n\nOVER\n"); exit(0); }; --------------- 发送文件程序 #include #include #include #include #include #include #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_120096 #defineSER_BAUD_240048 #defineSER_BAUD_960012 #defineSER_BAUD_192006 #defineSER_GP028 #defineCOM_10x3F8 #defineCOM_20x2F8/*/baseportaddressofport1*/ #defineCOM_30x3E8 #defineCOM_40x2E8 #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*/ #defineSER_DIV_LATCH_ON128/*/usedtoturnreg0,1intodivisorlatch*/ #definePIC_IMR0x21/*/pic'sinterruptmaskreg.*/ #definePIC_ICR0x20/*/pic'sinteruptcontrolreg.*/ #defineINT_SER_PORT_00x0C/*/port0interruptcom1&3*/ #defineINT_SER_PORT_10x0B/*/port0interruptcom2&4*/ #defineSERIAL_BUFF_SIZE128/*/currentsizeofcirculatingreceivebuffer*/ voidinterruptfar(*Old_Isr)(__CPPARGS);/*/holdsoldcomportinterrupthandler*/ 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>SERIAL_BUFF_SIZE-1) ser_start=0; ch=ser_buffer[ser_start]; printf("%x",ch); if(char_ready>0) --char_ready; return(ch); } else return(0); } /*--------------写串口-----------------*/ Serial_Write(charch) { while(! (inp(open_port+SER_LSR)&0x20)
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