NVM, I think I found what I needed in the USB Device Interface Guide.
I'm sure I'll be back with more questions.
On Feb 9, 2010, at 03:13:02, Rick Mann wrote:
> Hi. I've fiddled with IOKit and USB in the past, but now I have a need to write actual USB code. I have received a document that describes the raw requests that get sent to this device, and I'd like to learn how to implement one of those.
> Can someone point me to the right doc resources in IOKit for this?
> I have working object code for this device, it's just buggy. They created a userland driver that provides a C API to the device. I'd like to do the same.
> As an example, one of the requests the doc describes is (somewhat obscured so I don't violate the NDA I signed):
> bmRequestType $40
> bmRequest $0B
> lValue "bit mode output enable mask, per bit, 0 - input, 1 - output"
> hValue "bit mode enable $00 - Off"
> lIndex "$00 or $01 - Port A, $02 - Port B"
> hIndex $00
> lLength $00
> hLength $00
> Data Phase none
> what kind of IOKit request is that? I recognize it as stuff from the USB spec, but if there's sample code that shows a similar request being made, I can learn a lot from that.
> I think I know enough to figure out how to find the device and open it, although it's not clear what endpoint I need to talk to, etc (probably just ep 0, I think).
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