reactos/rostests/tests/sertest/sertest.c

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#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#define BUFSIZE 128
#define MAX_PORTNAME_LEN 20
#define APP_VERSION_STR "0.01"
int main(int argc, char *argv[])
{
CHAR txBuffer[BUFSIZE];
CHAR rxBuffer[BUFSIZE];
DWORD dwBaud = 9600;
DWORD dwNumWritten;
DWORD dwErrors;
DCB dcb;
BOOL bResult;
HANDLE hPort;
int i;
int j;
int k;
int nPortNum = 1;
TCHAR szPortName[MAX_PORTNAME_LEN];
if (argc > 1) {
//sscanf(argv[1], "%d", &dwBaud);
sscanf(argv[1], "%d", &nPortNum);
}
sprintf(szPortName, _T("COM%d"), nPortNum);
printf("Serial Port Test Application Version %s\n", APP_VERSION_STR);
printf("Attempting to open serial port %d - %s\n", nPortNum, szPortName);
hPort = CreateFile(szPortName,
GENERIC_READ|GENERIC_WRITE,
0, // exclusive
NULL, // sec attr
OPEN_EXISTING,
0, // no attributes
NULL); // no template
if (hPort == (HANDLE)-1) {
printf("ERROR: CreateFile() failed with result: %lx\n", (DWORD)hPort);
return 1;
}
printf("CreateFile() returned: %lx\n", (DWORD)hPort);
printf("Fiddling with DTR and RTS control lines...\n");
for (i = 0; i < 100; i++) {
bResult = EscapeCommFunction(hPort, SETDTR);
if (!bResult) {
printf("WARNING: EscapeCommFunction(SETDTR) failed: %lx\n", (DWORD)bResult);
}
bResult = EscapeCommFunction(hPort, SETRTS);
if (!bResult) {
printf("WARNING: EscapeCommFunction(SETRTS) failed: %lx\n", (DWORD)bResult);
}
for (j = 0; j < 1000; j++) {
k *= j;
}
/*
#define CLRDTR (6)
#define CLRRTS (4)
#define SETDTR (5)
#define SETRTS (3)
#define SETXOFF (1)
#define SETXON (2)
#define SETBREAK (8)
#define CLRBREAK (9)
*/
bResult = EscapeCommFunction(hPort, CLRDTR);
if (!bResult) {
printf("WARNING: EscapeCommFunction(CLRDTR) failed: %lx\n", (DWORD)bResult);
}
bResult = EscapeCommFunction(hPort, CLRRTS);
if (!bResult) {
printf("WARNING: EscapeCommFunction(CLRRTS) failed: %lx\n", (DWORD)bResult);
}
}
printf("Getting the default line characteristics...\n");
dcb.DCBlength = sizeof(DCB);
if (!GetCommState(hPort, &dcb)) {
printf("ERROR: failed to get the dcb: %ld\n", GetLastError());
return 2;
}
printf("Setting the line characteristics to 9600,8,N,1\n");
dcb.BaudRate = dwBaud;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
bResult = SetCommState(hPort, &dcb);
if (!bResult) {
printf("ERROR: failed to set the comm state: %lx\n", (DWORD)bResult);
return 3;
}
for (i = 0; i < BUFSIZE; i++) {
txBuffer[i] = (CHAR)i;
//printf(" %d ", txBuffer[i]);
rxBuffer[i] = 0xFF;
}
printf("\n");
printf("Writting transmit buffer to the serial port\n");
bResult = WriteFile(hPort, txBuffer, BUFSIZE, &dwNumWritten, NULL);
if (!bResult) {
printf("ERROR: failed to write to the serial port: %lx\n", (DWORD)bResult);
return 4;
}
printf("WriteFile() returned: %lx, byteswritten: %lx\n", (DWORD)bResult, dwNumWritten);
#if 0
printf("Attempting to read %d bytes from the serial port\n", BUFSIZE);
bResult = ReadFile(hPort, rxBuffer, BUFSIZE, &dwNumRead, NULL);
if (!bResult) {
printf("ERROR: failed to read from the serial port: %lx\n", (DWORD)bResult);
return 5;
}
printf("ReadFile() returned: %lx, bytesread: %lx\n", (DWORD)bResult, dwNumRead);
for (i = 0; i < BUFSIZE; i++) {
printf(" %d ",rxBuffer[i]);
}
#endif
printf("Attempting to close the serial port\n");
bResult = ClearCommError(hPort, &dwErrors, NULL);
printf("ClearCommError returned: %lx, dwErrors: %lx\n", (DWORD)bResult, dwErrors);
bResult = CloseHandle(hPort);
if (!bResult) {
printf("ERROR: failed to close the serial port: %lx\n", (DWORD)bResult);
return 6;
}
printf("Finished\n");
return 0;
}