Re: [Xenomai-help] Re: read data from serial device

[Philippe Gerum <rpm@xenomai.org>]

Marco Jackel wrote:
> Hi
> 
> Another try....
> 
> Marco Jackel wrote:
> 
>>I want to read data from the serial device
> 
> 
> to read data from a serial device I do the following:
> 
> /* config for serial device */
> 
> static const struct rtser_config ser_config = {
>     0xFFFF,                     /* config_mask */
>     RTSER_DEF_BAUD,          /* baud_rate */
>     RTSER_ODD_PARITY ,           /* parity */
>     RTSER_8_BITS ,             /* data_bits */
>     RTSER_1_STOPB ,            /* stop_bits */
>     RTSER_NO_HAND ,             /* handshake */
>     RTSER_DEF_FIFO_DEPTH,       /* fifo_depth*/
>     RTSER_DEF_TIMEOUT,          /* rx_timeout */
>     RTSER_DEF_TIMEOUT,          /* tx_timeout */
>     RTSER_DEF_TIMEOUT,          /* event_timeout */
>     RTSER_RX_TIMESTAMP_HISTORY, /* timestamp_history */
>     RTSER_EVENT_RXPEND          /* event mask */
> };
> 
> /* open the serial file */
> 
> my_fd = rt_dev_open( RTSER_FILE, 0);
> 
> /* write the serial config */
> 
> ret = rt_dev_ioctl(my_fd, RTSER_RTIOC_SET_CONFIG, &ser_config);
> 
> /* read from the device */
> 
> unsigned char buf[32];
> int sz;
> int red = 0;
> struct rtser_event rx_event;
> 
> while (1) {
>   ret = rt_task_set_mode(0, T_PRIMARY, NULL);
>   ret = rt_dev_ioctl(my_fd, RTSER_RTIOC_WAIT_EVENT, &rx_event );
>   red = rt_dev_read(my_fd, &buf, sizeof(buf));
>   printf(RTASK_PREFIX "rt_dev_read=%s\n",buf);
>   printf(RTASK_PREFIX "%d / %d byte received \n",red,sz);
> }
> 
> 
> "rt_dev_read" gives negative Results. Whats wrong?
> 

Which negative code is returned exactely?

> 
> Thanks
> Marco
> 
> 
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> 


-- 

Philippe.