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Re: need desperate help!!



At 4:21 PM -0800 1/6/05, She Jian, Chia wrote:

Question 1: if i were to send a message through the
control pipe, do i use writepipe to send it or do i
use  some other method to send it?

You might want to take a look at the documentation for IOUSBLib to familiarise yourself with which functions that are available. IOUSBLib.h also lists them. If you have the device open, DeviceRequeest is the API to do device requests. If you have the interface open, ControlRequest is the way to do control requests.


WritePipe is only for streams on Bulk and Interrupt pipes.

Question 2: how can i know or get the configurations
of the canera if i am not given the proper documentations??

Luck/Intuition/Experience.

is it possible at all?

Not in general, you have to indulge in reverse engineering. Sometimes its trivially obvious what's going on, sometimes its a complete enigma.


PS: You might want to get your keyboard looked at, its dropping lots of characters.
--
Barry Twycross
email@hidden
---
USB, it's not a Dyslexic BUS. (Thanks to TC.)
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 >Re: need desperate help!! (From: "She Jian, Chia" <email@hidden>)



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