Re: [Ftdi-usb-sio-devel] (no subject)

[Ian A. <ab...@me...>]

On Monday 14 October 2002 12:39, Gilles GRENIER wrote:
> is it possible to set the latency timer different to 16ms (for
> FT232BM device with the actual (kernel 2.4.20) driver)? best regards
> Gilles GRENIER

No, the current driver doesn't support this yet, mainly because the 
FT232BM  hasn't been around very long!

I'm not sure where such a mechanism would fit into the driver - Perhaps 
the Hayes ESP ioctls, TIOCGHAYESESP and TIOCSHAYESESP could be borrowed 
so that setserial's 'rx_timeout' parameter could be used to set the 
latency, but this would be a bit of a kludge.  The legitimate values 
for the 'rx_timeout' parameter (0 to 255) do correspond quite nicely 
with the latency times that the FT232BM can be set to though (1 to 255 
ms)!

Another possibility may be to make the latency depend on the baud rate 
in some way, though that would be odd for the FT245BM USB FIFO device, 
as it doesn't really have a baud rate.
-- 
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