Hello Newell,
On 11/08/2010 04:27 AM, Newell Jensen wrote:
>>>> buf0 = chr(ftdi.TCK_DIVISOR) # command "set divisor"
>>>> buf1 = chr(div & 0xFF) # NOTE: I have also tried using chr((div >> 0) &
>>>> 0xFF) as well
>>>> buf2 = chr(((div >> 8) & 0xFF))
>>>> buf = buf0 + buf1 + buf2
>>>> ftdi.ftdi_write_data(ftdic, buf, 3)
> -110
>
> So that is one issue I run into. That is, where the disabling of the 5X
> works but the other clock divisor setting doesn't. Something interesting is
> if I do the above without disabling the 5X, then it works. Any ideas on this?
Hmm. No idea right now. Could you come up
with a small C example code to demonstrate the issue?
> 2. The second issue I run into is setting the loopback after setting the
> clock divisor above (so I am not disabling the 5X so that I proceed on in my
> script to the loopback setting). When I go to disable or enable the loopback
> I get usb bulk write fail from the command below:
>
>>>> ftdi.ftdi_write_data(ftdic, chr(ftdi.LOOPBACK_START), 1)
>
>
> Any help would be greatly appreciated as at this point I am just scratching
> my head.
Never used that either. Though I'm not sure
if the ftdi.ftdi_write_data is the correct function
when using the python wrapper: ftdi_write_data() calls
usb_bulk_write(). Configuration changes inside
libftdi are normally communicated via usb_control_msg()
and also feature different "requests". Not sure
how you emulated that via the python wrapper??
Cheers,
Thomas
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
|
