Hello,

I have been trying to send a control transfer to a device. The
CTRL_LOOPBACK_WRITE command that is recommended in the pyusb tutorial does
not work with my device. Is there a way to check what commands it will
accept and what type of messages it'll take (e.g. strings vs. ints vs.
arrays).

I am using pyusb in Python 2.7 on OS X to send TTL pulses to a USB-1208FS
DAQ box, if that helps.

Thank you,
Irina
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