[Gumstix-users] Serial data stream into Robostix

[mgodinho <me....@gm...>]

List,

I am using a slightly modified sertest and LED-Flasher routines, where I
take in a serial data stream into robostix's UART1 , and then get it to
display on my PC screen when I ssh into the gumstix. The problem is that the
data doesn't display properly. When I plugged the device straight into  into
my PC, the first chunk of data is:

fa ff 3e 00 c3 fa ff 0d   76 00 50 10 02 04 80 00 
00 00 10 00 00 00 00 00   00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00   00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00   00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00   00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00   00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00   00 00 01 00 50 10 02 00 
0e 00 04 00 00 00 05 00   00 00 00 00 00 00 00 0e 


However, the gumstix/robostix sees it at:

00 81 b0 79 81 79 a2 5f df fb f7 ff ff ff df ff 
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff fd ff 5f df fb ff e3 ff f7 ff 
ff ff f5 ff ff ff ff ff ff ff ff e3

This is the modified LED-Flasher file:

#include <avr/io.h>

#include <stdio.h>


#include "a2d.h"

#include "Hardware.h"

#include "Timer.h"

#include "UART.h"




int main(void)

{



    FILE   *u0;

    FILE   *u1;



    InitHardware();



    // The first handle opened for read goes to stdin, and the first handle

    // opened for write goes to stdout. So u0 is stdin, stdout, and stderr




    u0 = fdevopen( UART0_PutCharStdio, NULL );

    u1 = fdevopen( NULL, UART1_GetCharStdio);


    

    while( 1 )

    {



            if ( UART1_IsCharAvailable() )

            {

                char    ch = getchar();


                printf( "%c", ch );


            }

    }



    return 0;

}




The reader portion of sertest was modified as such:

/***************************************************************************/
/**
*   Thread which processes the incoming serial data.
*/

void *ReaderThread( void *param )
{
    while ( 1 )
    {
        char    ch;
        int     bytesRead;

        if (( bytesRead  = read( gPortFd, &ch, 1 )) < 0 )
        {
            fprintf( stderr, "Serial port read failed: %s\n", strerror(
errno ));
            exit( 1 );
        }

/*        if ( gDebug )
        {
            if (( ch < ' ' ) || ( ch > '~' ))
            {
                fprintf( stderr, "Serial Read: 0x%02x '.'\n", ch );
            }
            else
            {
                fprintf( stderr, "Serial Read: 0x%02x '%c'\n", ch, ch );
            }

        }
*/
//        putc( ch, stdout );
        printf("%02x ", ch);
    }

    return 0;

} // ReaderThread


I've double checked all my settings such as baud rate, parity, stop bits and
data length bits.

Any help is appreciated.
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