cAT returning ERROR when running embedded.

[andrewstillie]

I have been testing cAT locally using a Linux machine and compiling with GCC and all is working fine.
This is how I have the comms interface set.
static int write_char(char ch)
{
putc(ch, stdout);
return 1;
}

static int read_char(char *ch)
{
*ch = getc(stdin);
return 1;
}

I now want to run the code embedded in a SiLabs Microcontroller via a UART and TeraTerm.
Serial output from the application is working fine. But when I send AT#HELP (or any other command) I get the "ERROR" response.

The main loop is calling handleATProcessing() every iteration.

struct cat_object at; is declared as a global.

int handleATProcessing(void)
{

    while ((cat_service(&at) != 0) && (quit_flag == 0))
    {
        sl_sleeptimer_delay_millisecond(1);
    };


    printf("Bye!\n");

    return 0;

}

My gut feeling is that a command is not being built as characters are received, so command buffer is empty when CR is received.
Can you see where I am going wrong or advise how to debug this?

[andrewstillie]

I had to add code to my .read as getc was returning 255 when no characters where detected.

[andrewstillie]

My issue - not cAT