Re: [Ftdi-usb-sio-devel] Resetting the FTDI

[Bill R. <bil...@gm...>]

On Fri, Nov 12, 2010 at 8:34 AM, Chris Stankevitz <chr...@ya...
> wrote:

>
> Is it possible for a userland program that is communicating with FTDI using
> open/close/ioctl/tcsetattr type calls to issue an FTDI reset or purge?
>
>
When the port is opened the driver issues a FTDI_SIO_RESET but it doesn't
purge it

You'd have to change the driver (the ftdi_open function in
drivers/usb/serial/ftdi_sio.c) and sent it three resets. The two purges and
the normal one.



> My application does not use libftdi (currently).  I am trying to get low
> latency comms with an FT245RL (only full speed) and I suspected libftdi
> wasn't up to the task (but that was when I knew relatively little about this
> process.  I should try again).  My goal is to get a message to the FT245RL
> and back to the host within each 1ms full speed frame.
>

I see. That will be quite tricky I suspect.