NT4/private/ntos/dd/serial/tgdtrrts.c

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2001-01-01 00:00:00 +01:00
//
// Test the get modem output signals ioctl.
//
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "nt.h"
#include "ntrtl.h"
#include "nturtl.h"
#include "windows.h"
#include "ntddser.h"
//
// This program assumes that it is using a loopback connector.
//
#define MAX_CHECK 100000
ULONG CheckValues[MAX_CHECK];
ULONG ReadValues[MAX_CHECK];
void main(int argc,char *argv[]) {
HANDLE hFile;
DCB MyDcb;
ULONG mask;
ULONG retSize;
char *MyPort = "COM1";
if (argc > 1) {
MyPort = argv[1];
}
if ((hFile = CreateFile(
MyPort,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL
)) == ((HANDLE)-1)) {
printf("Couldn't open the port %s\n",MyPort);
exit(1);
}
if (!GetCommState(
hFile,
&MyDcb
)) {
printf("We couldn't get the comm state\n");
exit(1);
}
//
// Set the baud to 19200 and the data bits to 8
// (We want 8 so that we don't lose any of our data.)
//
MyDcb.fDtrControl = DTR_CONTROL_DISABLE;
MyDcb.fRtsControl = DTR_CONTROL_DISABLE;
if (!SetCommState(
hFile,
&MyDcb
)) {
printf("We couldn't set the comm state\n");
exit(1);
}
if (!EscapeCommFunction(
hFile,
CLRDTR
)) {
printf("We couldn't clear the dtr\n");
exit(1);
}
if (!EscapeCommFunction(
hFile,
CLRRTS
)) {
printf("We couldn't clear the rts\n");
exit(1);
}
if (!DeviceIoControl(
hFile,
IOCTL_SERIAL_GET_DTRRTS,
NULL,
0,
&mask,
sizeof(mask),
&retSize,
NULL
)) {
printf("We couldn't call the iocontrol\n");
exit(1);
}
if (mask & (SERIAL_DTR_STATE | SERIAL_RTS_STATE)) {
printf("One of the bits is still set: %x\n",mask);
exit(1);
}
if (!EscapeCommFunction(
hFile,
SETRTS
)) {
printf("We couldn't set the rts\n");
exit(1);
}
if (!DeviceIoControl(
hFile,
IOCTL_SERIAL_GET_DTRRTS,
NULL,
0,
&mask,
sizeof(mask),
&retSize,
NULL
)) {
printf("We couldn't call the iocontrol\n");
exit(1);
}
if (!(mask & SERIAL_RTS_STATE)) {
printf("rts is not set: %x\n",mask);
exit(1);
}
if (!EscapeCommFunction(
hFile,
SETDTR
)) {
printf("We couldn't set the DTR\n");
exit(1);
}
if (!DeviceIoControl(
hFile,
IOCTL_SERIAL_GET_DTRRTS,
NULL,
0,
&mask,
sizeof(mask),
&retSize,
NULL
)) {
printf("We couldn't call the iocontrol\n");
exit(1);
}
if (!(mask & SERIAL_DTR_STATE)) {
printf("dtr is not set: %x\n",mask);
exit(1);
}
}