221 lines
4.6 KiB
C
221 lines
4.6 KiB
C
//
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// This test the line status and modem status insertion.
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//
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "nt.h"
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#include "ntrtl.h"
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#include "nturtl.h"
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#include "ntddser.h"
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#include "windows.h"
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#define SIZEOFBUF 1000000
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UCHAR readBuff[SIZEOFBUF];
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int __cdecl main(int argc,char *argv[]) {
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HANDLE hFile;
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DCB myDcb;
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char *myPort = "COM1";
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unsigned char escapeChar = 0xff;
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DWORD numberToRead;
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DWORD numberActuallyRead;
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DWORD useBaud = 1200;
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COMMTIMEOUTS to = {0};
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int j;
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IO_STATUS_BLOCK Iosb1;
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NTSTATUS Status1;
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if (argc > 1) {
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sscanf(argv[1],"%d",&numberToRead);
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if (argc > 2) {
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sscanf(argv[2],"%d",&useBaud);
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if (argc > 3) {
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myPort = argv[3];
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}
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}
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}
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if ((hFile = CreateFile(
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myPort,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL,
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NULL
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)) == ((HANDLE)-1)) {
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printf("Couldn't open the comm port\n");
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exit(1);
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}
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to.ReadIntervalTimeout = 1000;
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to.ReadTotalTimeoutConstant = 20000;
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if (!SetCommTimeouts(
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hFile,
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&to
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)) {
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printf("Couldn't set the timeouts\n");
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exit(1);
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}
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//
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// We've successfully opened the file. Set the state of
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// the comm device. First we get the old values and
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// adjust to our own.
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//
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if (!GetCommState(
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hFile,
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&myDcb
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)) {
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printf("Couldn't get the comm state: %d\n",GetLastError());
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exit(1);
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}
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myDcb.BaudRate = useBaud;
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myDcb.ByteSize = 8;
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myDcb.Parity = NOPARITY;
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myDcb.StopBits = ONESTOPBIT;
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//
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// Make sure that no flow control is turned on.
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//
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myDcb.fOutxDsrFlow = FALSE;
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myDcb.fOutxCtsFlow = FALSE;
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myDcb.fDsrSensitivity = FALSE;
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myDcb.fOutX = FALSE;
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myDcb.fInX = FALSE;
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myDcb.fDtrControl = DTR_CONTROL_DISABLE;
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myDcb.fRtsControl = RTS_CONTROL_DISABLE;
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if (!SetCommState(
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hFile,
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&myDcb
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)) {
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printf("Couldn't set the comm state.\n");
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exit(1);
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}
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//
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// Start up the insert ioctl.
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//
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Status1 = NtDeviceIoControlFile(
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hFile,
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NULL,
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NULL,
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NULL,
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&Iosb1,
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IOCTL_SERIAL_LSRMST_INSERT,
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&escapeChar,
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sizeof(unsigned char),
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NULL,
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0
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);
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if (!NT_SUCCESS(Status1)) {
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printf("1: Non pending status: %x\n",Status1);
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exit(1);
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}
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if (!ReadFile(
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hFile,
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&readBuff[0],
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64000,
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&numberActuallyRead,
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NULL
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)) {
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printf("bad status on read: %d\n",GetLastError());
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exit(1);
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}
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printf("We actually read %d characters\n",numberActuallyRead);
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//
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// We got the characters back. Dump each character to the stdout.
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//
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for (
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j = 0;
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j < numberActuallyRead;
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) {
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if (readBuff[j] != escapeChar) {
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printf("Normal Char: %x\n",readBuff[j]);
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j++;
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} else {
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if (j+1 == numberActuallyRead) {
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printf("Terminated with the escape char!!!\n");
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exit(1);
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}
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//
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// We have the escape char. interpret it.
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//
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if (readBuff[j+1] == SERIAL_LSRMST_ESCAPE) {
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printf("Escaped escape char: %x\n",escapeChar);
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j += 2;
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} else if (readBuff[j+1] == SERIAL_LSRMST_LSR_DATA) {
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printf("LSR reg: %x AND data: %x\n",readBuff[j+2],readBuff[j+3]);
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j += 4;
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} else if (readBuff[j+1] == SERIAL_LSRMST_LSR_NODATA) {
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printf("LSR reg: %x NO DATA\n",readBuff[j+2]);
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j += 3;
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} else if (readBuff[j+1] == SERIAL_LSRMST_MST) {
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printf("MST reg: %x\n",readBuff[j+2]);
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j += 3;
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} else {
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printf("Unknown escape code: %d\n",readBuff[j+1]);
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j++;
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}
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}
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}
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}
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