178 lines
3.8 KiB
C
178 lines
3.8 KiB
C
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#include <windows.h>
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#include <stdio.h>
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#define NUM 128
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DWORD main(int argc, char *argv[], char *envp[])
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{
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CHAR chBuffer[128];
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CHAR RdBuffer[128];
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DWORD UseBaud = 9600;
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WORD i;
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HANDLE hCommPort;
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DCB dcb;
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BOOL bRc;
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DWORD dwNumWritten,dwNumRead,dwErrors;
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envp;
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if (argc > 1)
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{
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sscanf(argv[1],"%d",&UseBaud);
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}
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printf("\n\n *** COMM TEST START ***\n\n");
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printf("Opening the comm port for read write\n");
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hCommPort = CreateFile(
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"COM1",
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GENERIC_READ|GENERIC_WRITE,
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0, // exclusive
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NULL, // sec attr
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OPEN_EXISTING,
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0, // no attributes
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NULL); // no template
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if (hCommPort == (HANDLE)-1)
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{
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printf("FAIL: OpenComm failed rc: %lx\n",hCommPort);
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return -1;
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}
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printf("Opening the comm port for read write: SUCCESS hCommPort=%lx\n",hCommPort);
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printf("Setting the line characteristics 9600,8,N,1 on comm \n");
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dcb.DCBlength = sizeof(DCB);
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// dcb.DCBversion = 0x0002; BUG BUG in spec not in header
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if (!GetCommState(hCommPort,&dcb))
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{
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printf("FAIL: Couldn't get the dcb: %d\n",GetLastError());
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return FALSE;
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}
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dcb.BaudRate = UseBaud;
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dcb.ByteSize = 8;
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dcb.Parity = NOPARITY;
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dcb.StopBits = ONESTOPBIT;
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bRc = SetCommState(hCommPort,&dcb);
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if (!bRc)
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{
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printf("FAIL: cannot set the comm state rc:%lx\n",bRc);
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return -1;
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}
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printf("Setting the line characteristics 9600,8,N,1 on comm: SUCCESS\n");
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printf("Filling the buffer with the known chars \n");
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for (i=0; i< NUM; i++)
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{
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//chBuffer[i] = 'a';
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chBuffer[i] = (CHAR)i;
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}
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printf("Filling the buffer with the known chars : SUCCESS\n");
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printf("Dumping the buffer before sending it to comm\n");
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for (i=0; i< NUM; i++)
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{
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//printf("%c",RdBuffer[i]);
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printf(" %d ",chBuffer[i]);
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}
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printf("\nDumping the buffer before sending it to comm SUCCESS\n");
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printf("Filling the Rdbuffer with the known chars (0xFF) to makeit dirty\n");
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for (i=0; i< NUM; i++)
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{
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RdBuffer[i] = 0xFF;
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}
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printf("Filling the Rdbuffer with the known chars (0xFF): SUCCESS\n");
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printf("Writting this buffer to the comm port\n");
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bRc = WriteFile( hCommPort,
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chBuffer,
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NUM,
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&dwNumWritten,
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NULL);
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if (!bRc)
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{
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printf("FAIL: cannot Write To the comm port:%lx\n",bRc);
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return -1;
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}
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printf("Writting this buffer to the comm port: SUCCESS rc:%lx, byteswritten:%lx\n",
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bRc,dwNumWritten);
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printf("Reading this buffer from the comm port\n");
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bRc = ReadFile( hCommPort,
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RdBuffer,
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NUM,
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&dwNumRead,
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NULL);
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if (!bRc)
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{
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printf("FAIL: cannot Read From the comm port:%lx\n",bRc);
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return -1;
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}
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printf("Reading this buffer from the comm port: SUCCESS rc:%lx, bytesread:%lx\n",
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bRc,dwNumRead);
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printf("Dumping the Rdbuffer with the comm data\n");
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for (i=0; i< NUM; i++)
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{
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//printf("%c",RdBuffer[i]);
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printf(" %d ",RdBuffer[i]);
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}
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printf("\nDumping the Rdbuffer with the comm data: SUCCESS\n");
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printf("Closing the comm port\n");
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bRc = ClearCommError(hCommPort,&dwErrors,NULL);
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printf("ClearCommError: rc= %lx and dwErrors=%lx\n",bRc,dwErrors);
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bRc = CloseHandle(hCommPort);
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if (!bRc)
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{
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printf("FAIL: cannot close the comm port:%lx\n",bRc);
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return -1;
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}
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printf("\n\n*** COMM TEST OVER*** \n\n");
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return 0;
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}
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