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#include <windows.h>
#include <stdio.h>
//#define COM_DEB 1
#define NUM 20
#define SETTINGS1 "COM3",9600,8,NOPARITY,ONESTOPBIT
#define SETTINGS15 "COM3",9600,5,NOPARITY,ONE5STOPBITS
#define SETTINGS2 "COM3",4800,8,NOPARITY,ONESTOPBIT
#define SETTINGS3 "COM3",2400,8,NOPARITY,ONESTOPBIT
#define SETTINGS4 "COM3",300,8,NOPARITY,ONESTOPBIT
BOOL DoComIo(LPSTR lpCom,DWORD Baud,BYTE Size,BYTE Parity,BYTE Stop);DWORD main(int argc, char *argv[], char *envp[]){BOOL bRc;
UNREFERENCED_PARAMETER(argc);UNREFERENCED_PARAMETER(argv);UNREFERENCED_PARAMETER(envp);
printf("\n\n *** Doing COM TEST with [port=%s Baud=%d,Size=%d,Parity=%d,Stop=%d]***\n\n", SETTINGS1);bRc = DoComIo(SETTINGS1);if (!bRc) { printf("\n\nCOM TEST FAILED********************************\n\n"); }
return 0;}
BOOL DoComIo(LPSTR lpCom,DWORD Baud,BYTE Size,BYTE Parity,BYTE Stop){
CHAR WrBuffer[NUM];CHAR RdBuffer[NUM+5];DWORD i;HANDLE hCommPort;DCB dcb;BOOL bRc;DWORD dwNumWritten,dwNumRead,dwErrors;COMSTAT ComStat;
printf("\n\n *** COMM TEST START [port=%s,Baud=%d,Size=%d,Parity=%d,Stop=%d]***\n\n", lpCom,Baud,Size,Parity,Stop);
printf("Opening the comm port for read write\n");
hCommPort = CreateFile( lpCom, GENERIC_READ|GENERIC_WRITE, 0, // exclusive
NULL, // sec attr
OPEN_EXISTING, 0, // no attributes
NULL); // no template
if (hCommPort == (HANDLE)-1) { printf("FAIL: OpenComm failed rc: %lx\n",hCommPort); return FALSE; }
printf("Opening the comm port for read write: SUCCESS hCommPort=%lx\n",hCommPort);
printf("Setting the line characteristics on comm \n");
//printf("doing getcommstate for priming the dcb with defaults\n");
//bRc = GetCommState(hCommPort,&dcb);
if (!bRc) { printf("FAIL: getcommstate failed\n"); return FALSE; }
// toggle rts dtr when xonlim xofflim reached
// fdtrcontrol frtscontrol
// send xoff when xofflim reached and send xon when xonlim reached
// fInX
// xonlim xonlim xonchar xoffchar
dcb.DCBlength = sizeof(DCB);// dcb.DCBversion = 0x0002; BUG BUG in spec not in header
dcb.BaudRate = Baud;dcb.ByteSize = Size;dcb.Parity = Parity;dcb.StopBits = Stop;
dcb.fBinary = 1; // binary data xmit
dcb.fParity = 0; // dont bother about parity
dcb.fOutxCtsFlow= 0; // no cts flow control
dcb.fOutxDsrFlow= 0; // no dsr flow control
dcb.fDtrControl = DTR_CONTROL_HANDSHAKE; // dont bother about dtr
dcb.fRtsControl = RTS_CONTROL_HANDSHAKE; // dont bother about dtr
dcb.fOutX =1; // disable xoff handling
dcb.fInX =1; // disable xon handling
dcb.fErrorChar = 0; // forget about parity char
dcb.fNull = 0; // forget about the null striping
dcb.XonChar = '#';dcb.XonLim = 1;dcb.XoffChar = '*';dcb.XoffLim = 4090;
dcb.ErrorChar = '*';dcb.EofChar = 0x00;dcb.EvtChar = 'x';
//dcb.TxDelay = 100000; // 100sec
bRc = SetCommState(hCommPort,&dcb);
if (!bRc) { printf("FAIL: cannot set the comm state rc:%lx\n",bRc); bRc = CloseHandle(hCommPort); if (!bRc) { printf("FAIL: cannot close the comm port:%lx\n",bRc); } return FALSE; }
printf("Setting the line characteristics on comm: SUCCESS\n");
printf("Filling the buffer with the known chars \n");
for (i=0; i< NUM; i++) { WrBuffer[i] = 'a'; //WrBuffer[i] = (CHAR)i;
}
printf("Filling the buffer with the known chars : SUCCESS\n");
printf("Dumping the buffer before sending it to comm\n");
for (i=0; i< 6; i++) { printf("%c",WrBuffer[i]); //printf(" %d ",WrBuffer[i]);
}
printf("\nDumping the buffer before sending it to comm SUCCESS\n");
printf("Filling the Rdbuffer with the known chars (0xFF) to makeit dirty\n");
for (i=0; i< NUM+2; i++) { RdBuffer[i] = 'z'; }
printf("Filling the Rdbuffer with the known chars (0xFF/z): SUCCESS\n");
printf("Writting this buffer to the comm port\n");
bRc = WriteFile( hCommPort, WrBuffer, 6, &dwNumWritten, NULL);
if (!bRc) { printf("FAIL: cannot Write To the comm port:%lx\n",bRc); bRc = CloseHandle(hCommPort); if (!bRc) { printf("FAIL: cannot close the comm port:%lx\n",bRc); } return FALSE; }
printf("Writting this buffer to the comm port: SUCCESS rc:%lx, byteswritten:%lx\n", bRc,dwNumWritten);
printf("Reading this buffer from the comm port\n");
bRc = FlushFileBuffers(hCommPort);printf("flush file buffers (%lx) rc = %lx\n",hCommPort,bRc);
bRc = ClearCommError(hCommPort,&dwErrors,&ComStat);printf("ClearCommError: rc= %lx and dwErrors=%lx\n",bRc,dwErrors);
printf("Comstat.fXoffSent = %lx\n",(DWORD)(ComStat.fXoffSent));printf("Comstat.fXoffHold = %lx\n",(DWORD)(ComStat.fXoffHold));
printf("reading the first num chars\n");
bRc = ReadFile( hCommPort, RdBuffer, 6, &dwNumRead, NULL);
if (!bRc) { printf("FAIL: cannot Read From the comm port:%lx\n",bRc); bRc = CloseHandle(hCommPort); if (!bRc) { printf("FAIL: cannot close the comm port:%lx\n",bRc); } return FALSE; }
printf("Reading this buffer from the comm port: SUCCESS rc:%lx, bytesread:%lx\n", bRc,dwNumRead);
printf("Dumping the Rdbuffer with the comm data\n");
for (i=0; i< 6; i++) { printf("%c ",RdBuffer[i]); //printf(" %d ",RdBuffer[i]);
}
printf("\nDumping the Rdbuffer with the comm data: SUCCESS\n");
for (i=0; i< 6; i++) { if (RdBuffer[i] != WrBuffer[i]) { printf("FAIL: BufferMisMatch: RdBuffer[%d]=%lx,WrBuffer[%d]=%lx\n", i,RdBuffer[i],i,WrBuffer[i]); bRc = CloseHandle(hCommPort); if (!bRc) { printf("FAIL: cannot close the comm port:%lx\n",bRc); } return FALSE; } }
printf("Comparing the rd and wr buffers: SUCCESS\n");
bRc = FlushFileBuffers(hCommPort);printf("flush file buffers (%lx,0) rc = %lx\n",hCommPort,bRc);
bRc = ClearCommError(hCommPort,&dwErrors,&ComStat);printf("ClearCommError: rc= %lx and dwErrors=%lx\n",bRc,dwErrors);
printf("Comstat.fXoffSent = %lx\n",(DWORD)(ComStat.fXoffSent));printf("Comstat.fXoffHold = %lx\n",(DWORD)(ComStat.fXoffHold));
bRc = PurgeComm(hCommPort,0);printf("PurgeComm BUG (%lx,0) rc = %lx\n",hCommPort,bRc);
bRc = PurgeComm(hCommPort,PURGE_TXCLEAR);printf("PurgeComm txclear (%lx) rc = %lx\n",hCommPort,bRc);
bRc = PurgeComm(hCommPort,PURGE_RXCLEAR);printf("PurgeComm rxclear (%lx) rc = %lx\n",hCommPort,bRc);
bRc = PurgeComm(hCommPort,PURGE_RXABORT);printf("PurgeComm rxabort (%lx) rc = %lx\n",hCommPort,bRc);
bRc = PurgeComm(hCommPort,PURGE_TXABORT);printf("PurgeComm txabort (%lx) rc = %lx\n",hCommPort,bRc);
printf("Closing the comm port\n");bRc = CloseHandle(hCommPort);
if (!bRc) { printf("FAIL: cannot close the comm port:%lx\n",bRc); return FALSE; }
printf("\n\n*** COMM TEST OVER*** \n\n");}
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