Re: [Ftdi-usb-sio-devel] about XON/XOFF

[Tao J. <jin...@gm...>]

thanks bill!

I set the IXON and IXOFF flags in my our serial io program by doing
c_flag |= IXON | IXOFF

But when the serial dev sends XOFF, the pc still can send bytes to the serial dev

Is this the right way to do this?

Thanks again

Jintao


On Jul 8, 2010, at 3:08, Bill Ryder <bil...@gm...> wrote:

> Usually you use the kernel serial stack to handle xon/off
> 
> Search google for 
> 
> termios xon
> 
> eg
> http://homepages.cwi.nl/~aeb/linux/man2html/man3/termios.3.html
> and
> http://en.wikibooks.org/wiki/Serial_Programming/termios
> 
> 
> for example.
> 
> 
> 
> On Thu, Jul 8, 2010 at 11:44 AM, Tao Jin <jin...@gm...> wrote:
> Dear all,
> 
> I have a question about serial software flow control.  Here is my
> experiment setup.
> 
> PC < ---- > serial device
> 
> PC1 talks to serial device through minicom.
> 
> When I send a byte in minicom, the serial device toggle LED to
> indicate the reception of new byte
> 
> When serial device receives up to 10 byte, serial device sends
> XOFF(0x13) byte to PC.
> 
> I have already enabled software flow control in minicom, so I expect
> that next time when I send another byte from minicom, the serial
> device is NOT supposed to receive anything.  b/c the serial driver
> received XOFF earlier.
> 
> But XOFF doesn't work for me.
> 
> My question is should my program takes care of XOFF?  or the serial
> driver actually takes care of that automatically?
> 
> thanks a lot in advance!
> 
> jintao
> 
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