Flowcontrol /dev/ttySAC1

Noobie
2011-09-01 15:29:29
Hi,

I'm using micro2440 in my own hardware to communicate to a GPRS modem
connected to /dev/ttySAC1.

With no hardware flowcontrol my program can quite happily talk to the modem
:-)

However when I try using hardware flowcontrol (RTS1/CTS1), my program fails
to see CTS1 going active :-(

The same serial comms routine work on another S3C2440 Linux based board
(Embedian MXM-7114)?

I've also tried toggling RTS1 using the following snippet -

for ( ; ; )
{
    ioctl ( fdes, TIOCMGET, &mcs ) ;
    mcs |= TIOCM_RTS;
    ioctl ( fdes, TIOCMSET, &mcs ) ;
    tcflush ( fdes, TCIOFLUSH ) ;

    ioctl ( fdes, TIOCMGET, &mcs ) ;
    mcs &= ~TIOCM_RTS;
    ioctl ( fdes, TIOCMSET, &mcs ) ;
    tcflush ( fdes, TCIOFLUSH ) ;
}

But I didn't see RTS1 toggling :-(

Are RTS1/CTS1 (GPG9/GPG10), being used by FriendlyArm for anything else?

Many thanks,

Noob