I tried to use the device HID interface, but I can't figure
it out. So I put the kext back in the
system/library/extensions so I can use the device as USB.
I copied USBSimple Example, changed the idvendor and
idproduct to that of my product, and changed dealWithPipes
to use interrupt pipes (kUSBInterrupt), instead of bulk
pipes
Everything runs fine. I have the intf, and the inPipeRef,
so far so good.
I understand that I have to use IOUSBInterfaceInterface
http://developer.apple.com/documentation/Darwin/Reference/IOKit/IOUSBLib/Classes/IOUSBInterfaceInterface/
I saw that ReadPipe reads data on a BULK IN or an INTERRUPT
pipe, so I tried
numBytesRead = sizeof(gBuffer) - 1;
err = (*intf)->ReadPipe(intf, inPipeRef, gBuffer, &numBytesRead);
but I get an error message.
I tried uncommenting
if (inPipeRef && outPipeRef)
transferData(intf, inPipeRef, outPipeRef);
and I don't get any error message there, but I don't
understand what this function does: Can I recover from it
the data that my device is putting out every 10msec?
ignoramus
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