Source code of Windows XP (NT5)
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

177 lines
3.6 KiB

#include <windows.h>
#include <stdio.h>
#define NUM 128
DWORD main(int argc, char *argv[], char *envp[])
{
CHAR chBuffer[128];
CHAR RdBuffer[128];
DWORD UseBaud = 9600;
WORD i;
HANDLE hCommPort;
DCB dcb;
BOOL bRc;
DWORD dwNumWritten,dwNumRead,dwErrors;
envp;
if (argc > 1)
{
sscanf(argv[1],"%d",&UseBaud);
}
printf("\n\n *** COMM TEST START ***\n\n");
printf("Opening the comm port for read write\n");
hCommPort = CreateFile(
"COM1",
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 -1;
}
printf("Opening the comm port for read write: SUCCESS hCommPort=%lx\n",hCommPort);
printf("Setting the line characteristics 9600,8,N,1 on comm \n");
dcb.DCBlength = sizeof(DCB);
// dcb.DCBversion = 0x0002; BUG BUG in spec not in header
if (!GetCommState(hCommPort,&dcb))
{
printf("FAIL: Couldn't get the dcb: %d\n",GetLastError());
return FALSE;
}
dcb.BaudRate = UseBaud;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
bRc = SetCommState(hCommPort,&dcb);
if (!bRc)
{
printf("FAIL: cannot set the comm state rc:%lx\n",bRc);
return -1;
}
printf("Setting the line characteristics 9600,8,N,1 on comm: SUCCESS\n");
printf("Filling the buffer with the known chars \n");
for (i=0; i< NUM; i++)
{
//chBuffer[i] = 'a';
chBuffer[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< NUM; i++)
{
//printf("%c",RdBuffer[i]);
printf(" %d ",chBuffer[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; i++)
{
RdBuffer[i] = 0xFF;
}
printf("Filling the Rdbuffer with the known chars (0xFF): SUCCESS\n");
printf("Writting this buffer to the comm port\n");
bRc = WriteFile( hCommPort,
chBuffer,
NUM,
&dwNumWritten,
NULL);
if (!bRc)
{
printf("FAIL: cannot Write To the comm port:%lx\n",bRc);
return -1;
}
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 = ReadFile( hCommPort,
RdBuffer,
NUM,
&dwNumRead,
NULL);
if (!bRc)
{
printf("FAIL: cannot Read From the comm port:%lx\n",bRc);
return -1;
}
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< NUM; i++)
{
//printf("%c",RdBuffer[i]);
printf(" %d ",RdBuffer[i]);
}
printf("\nDumping the Rdbuffer with the comm data: SUCCESS\n");
printf("Closing the comm port\n");
bRc = ClearCommError(hCommPort,&dwErrors,NULL);
printf("ClearCommError: rc= %lx and dwErrors=%lx\n",bRc,dwErrors);
bRc = CloseHandle(hCommPort);
if (!bRc)
{
printf("FAIL: cannot close the comm port:%lx\n",bRc);
return -1;
}
printf("\n\n*** COMM TEST OVER*** \n\n");
return 0;
}