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Configuring port rs232

psm

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Configuring port rs232

November 11, 2009, 12:40:20 PM

Good evening,
please can you help me with this code? I want to change it, because I must read some data from reader, which will be access to pc by rs232.
Thank you.

Code:

#include <windows.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
DCB dcb;
HANDLE hCom;
BOOL fSuccess;
char *pcCommPort = "COM2";

hCom = CreateFile( pcCommPort,
GENERIC_READ | GENERIC_WRITE,
0, // must be opened with exclusive-access
NULL, // no security attributes
OPEN_EXISTING, // must use OPEN_EXISTING
0, // not overlapped I/O
NULL // hTemplate must be NULL for comm devices
);

if (hCom == INVALID_HANDLE_VALUE)
{
// Handle the error.
printf ("CreateFile failed with error %d.\n", GetLastError());
return (1);
}

// Build on the current configuration, and skip setting the size
// of the input and output buffers with SetupComm.

fSuccess = GetCommState(hCom, &dcb);

if (!fSuccess)
{
// Handle the error.
printf ("GetCommState failed with error %d.\n", GetLastError());
return (2);
}

// Fill in DCB: 57,600 bps, 8 data bits, no parity, and 1 stop bit.

dcb.BaudRate = CBR_57600; // set the baud rate
dcb.ByteSize = 8; // data size, xmit, and rcv
dcb.Parity = NOPARITY; // no parity bit
dcb.StopBits = ONESTOPBIT; // one stop bit

fSuccess = SetCommState(hCom, &dcb);

if (!fSuccess)
{
// Handle the error.
printf ("SetCommState failed with error %d.\n", GetLastError());
return (3);
}

printf ("Serial port %s successfully reconfigured.\n", pcCommPort);
return (0);
}

« Last Edit: August 25, 2011, 07:52:46 PM by Admin »

polas

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Re: Configuring port rs232

January 05, 2010, 04:27:44 PM

Change what exactly? It is difficult to know what you want to do if you don't provide further details

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julie20099

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Re: Configuring port rs232

August 21, 2010, 10:49:45 PM

The Cisco manual describes this in detail.

Rather than try to restate the manual herein, which is way beyond the ability of this forum, I suggest you consult the manual.

Remember the switch does not have a DHCP server so you must manually set your pc on the subnet the switch is on and then change the IP address.

Often this is done easiest in CLI so if you do not know command line language, you will need to beef up your skill here as well. Again check the manuals.

« Last Edit: August 25, 2011, 07:53:09 PM by Admin »

polas

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Re: Configuring port rs232

August 22, 2010, 01:45:53 AM

Quote from: julie20099 on August 21, 2010, 10:49:45 PM

The op wanted to read values from the rs232 in their c code and use them for processing. This has nothing to do with Cisco, DHCP nore IP addresses.

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cipl

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Re: Configuring port rs232

April 29, 2011, 01:24:53 AM

RS232 is a serial communication port. You can read and write data serially with the help of RS232. I have use RS232 with the assembly language so I am not able to give the proper solution for this one.

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