Ubuntu :: Unable To Read The Serial Port

May 23, 2010

I am using a F232 USB to serial adapter for connecting my wireless modem to my laptop and I wrote a simple C code for reading data received by the modem transmitted by another modem installed on my target device.The problem is my code is simply giving 0.00000 (float data) output .When I use the same code with my desktop its running fine and I am getting relevant data.What may be the problem? I even changed the permission for my /dev/ttyUSB0 I am using Ubuntu 10.04 on both my laptop and desktop

below is my code

Code:

#include <stdlib.h>
#include <math.h>
#include <errno.h> /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */

[code]....

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Ubuntu :: Serial Port Read, Write After DTR Toggle In C++?

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I need to read and write to a serial device. When I connect via gtkterm, I need to toggle DTR before I can communicate with the device . My problem is that I cannot emulate this in C++.

I want to write some code that can setup a comport, toggle the DTR, then read and write strings to the port. However all my attempts have been fruitless. My serial settings are B9600, No parity, no hardware control, 8 bt characters and 1 stop bit:

Code:
#include <iostream>
#include <SerialStream.h>
#include <sys/ioctl.h>
#include <fcntl.h>
using namespace LibSerial;

[Code]...

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Code:
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[code]...

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Code:
int initport(int fd)
{

[code]...

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Code:
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if (serialfd == -1)

[code]...

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//------------------------------------------------------------
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[code]...

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[Code].....

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I went into:

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[Code]....

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