There wasn't much to it. I originally assumed that the FT232R was
involved in processing XON/XOFF messages in some way because of the
SIO_XON_XOFF_HS and related entries in ftdi.h. My hope was that
XON/XOFF bytes on the UART side would be changed into status bit changes
on USB.
Once I gave up on that direction (still not really understanding what
the chip does with flow control), I realized that the XON/XOFF bytes
were in the data stream untouched by the hardware, and so I started to
process them.
I'm going to spend a little more time trying to understand the different
flow control modes and how they impact both the UART and USB sides of
the chip, but I've solved my immediate problem. I'd really like to do
out of band interrupt signaling, but that's a project for another day.
Thanks again for a great library. Even though I'm not using it
directly, having it as a reference has been very helpful. If you want
to see what I've been doing, my code is up on github at
https://github.com/mattstock and I have a video of my application using
an early version of the USB code at
https://www.youtube.com/watch?v=Ym3K71dbbVw.
-Matt
On 5/30/2012 8:58 AM, Gautam Morey wrote:
What did you find Matt? Can you please share it.
On Wed, May 30, 2012 at 8:45 AM, Matthew Stock <[email protected]
<mailto:[email protected]>> wrote:
On 5/29/2012 9:41 AM, Thomas Jarosch wrote:
libftdi doesn't have built in support for XON/XOFF, you have
to handle this at the application level.
Never mind - I figured it out. Once I realized that the software
flow control options for the chip were a bit of a red herring, I
looked for and found the flow control bytes in the data stream.
All better!
-Matt
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