Re: [ECOS] BREAK handling in serial driver (SA1110)

[Jonathan Larmour <jlarmour at redhat dot com>]

Andreas Bürgel wrote:
> 
> Hi folks,
> 
> I'm wondering how to get the line status information of the serial
> driver to application level. Our application needs to know when a BREAK
> signal arrived, so where is the magic function that delivers a
> cyg_serial_line_status_t struct?

The sa11x0 driver doesn't support any of that stuff. It would need to be
added. Use the driver in devs/serial/generic/16x5x as a guide. It includes:

#ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
        case ISR_LS:
            {
                cyg_serial_line_status_t stat;
                cyg_uint8 _lsr;
                HAL_READ_UINT8(base+REG_lsr, _lsr);

                // this might look expensive, but it is rarely the case
that
                // more than one of these is set
                stat.value = 1;
                if ( _lsr & LSR_OE ) {
                    stat.which = CYGNUM_SERIAL_STATUS_OVERRUNERR;
                    (chan->callbacks->indicate_status)(chan, &stat );
                }
                if ( _lsr & LSR_PE ) {
                    stat.which = CYGNUM_SERIAL_STATUS_PARITYERR;
                    (chan->callbacks->indicate_status)(chan, &stat );
                }
                if ( _lsr & LSR_FE ) {
                    stat.which = CYGNUM_SERIAL_STATUS_FRAMEERR;
                    (chan->callbacks->indicate_status)(chan, &stat );
                }
                if ( _lsr & LSR_BI ) {
                    stat.which = CYGNUM_SERIAL_STATUS_BREAK;
                    (chan->callbacks->indicate_status)(chan, &stat );
                }

and indicate_status calls into serial_indicate_status in
io/serial/current/src/common/serial.c

Jifl
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