Hi sven
as far as i have tested and know InpOut32 works with all known
IO mapped hardware registers and addresses,
i think you should be able to access the uart registers in the same way
as you access the parallel port registers, but i haven't tried this.
anyhow, the serial port is much more convenient to handle
with win api function calls ... see the following sample
/********************************************************************/
/* */
/* Terminal.cpp: Sample UART Loopback Terminal Program */
/* */
/* This is a sample terminal emulator for the UART based serial */
/* communications card. Please view the file abstract.txt for */
/* more information. */
/* */
/* (c)Copyright Sealevel Systems, Inc., 1999 */
/* */
/* SEALEVEL SYSTEMS INCORPORATED. */
/* 155 Technology Place */
/* P.O. Box 830 */
/* Liberty, SC 29657 USA */
/* (864) 843-4343 */
/* (864) 843-3067 FAX */
/* */
/********************************************************************/
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#define TIMEOUT_CONSTANT 50
#define ESC 27
int main(int argc, char* argv[])
{
int key_pressed = 0;
char outchar = 0;
char inchar = 0;
DWORD bytes_written = 0; // Number of bytes written to port
DWORD bytes_read = 0; // Number of bytes read from port
COMMTIMEOUTS tempComTimeouts; // Our temporary time-outs for COM1
COMMTIMEOUTS savedComTimeouts; // Stores the original time-outs
HANDLE comport = NULL; // Handle for COM port
DCB comSettings; // Contains various port settings
printf("Sample UART Loopback Terminal Program v1.00.\n");
printf("(c)Copyright Sealevel Systems, Inc., 1999.\n\n");
// Open COM port
if ((comport =
CreateFile("COM1",
GENERIC_READ | GENERIC_WRITE, // for reading and writing
0, // exclusive access
NULL, // no security attributes
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL)) == INVALID_HANDLE_VALUE)
{
printf("Unable to open COM1.\n\n");
printf("Press any key to exit.");
getch();
return(1);
}
printf("COM1 opened.\n\n");
// Save time-out parameters for COM1
GetCommTimeouts(comport,&savedComTimeouts);
// Set our time-outs
tempComTimeouts.ReadIntervalTimeout = TIMEOUT_CONSTANT;
tempComTimeouts.ReadTotalTimeoutMultiplier = TIMEOUT_CONSTANT;
tempComTimeouts.ReadTotalTimeoutConstant = TIMEOUT_CONSTANT;
tempComTimeouts.WriteTotalTimeoutMultiplier = TIMEOUT_CONSTANT;
tempComTimeouts.WriteTotalTimeoutConstant = TIMEOUT_CONSTANT;
SetCommTimeouts(comport,&tempComTimeouts);
// Set Port parameters.
// We make a call to GetCommState() first in order to fill
// the comSettings structure with all the necessary values.
// Then we change the ones we want and call SetCommState().
GetCommState(comport, &comSettings);
comSettings.BaudRate = 9600;
comSettings.StopBits = ONESTOPBIT;
comSettings.ByteSize = 8;
comSettings.Parity = NOPARITY;
comSettings.fParity = FALSE;
SetCommState(comport, &comSettings);
printf("Ready to send/receive data. Hit ESC to exit.\n\n");
while(key_pressed != ESC)
{
if (kbhit())
{
key_pressed = getch();
outchar = (char)key_pressed;
if (key_pressed != ESC)
{
// Send data. if succesful, WriteFile() returns non-zero
WriteFile(comport, // Handle
&outchar, // Outgoing data
1, // Number of bytes to write
&bytes_written, // Number of bytes written
NULL);
}
}
// Read data. if succesful, ReadFile() returns non-zero
ReadFile(comport, // Handle
&inchar, // Incoming data
1, // Number of bytes to read
&bytes_read, // Number of bytes read
NULL);
if (bytes_read == 1)
if (inchar == 13)
printf("\n");
else
printf("%c", inchar);
}
// Restore time-out parameters
SetCommTimeouts(comport,&savedComTimeouts);
CloseHandle(comport);
printf("\n");
return(0);
}
-tiwag
