USBLib_CtrlMsg (SWI &5635E) — Starts a transaction using a formatted control message.
| R0 | pipe |
| R1 | Data URB (0 if no data to be transfered) |
| R2 | Message URB |
| R3 | waiting template |
| R4 | bmRequestType (8bit) |
| R5 | bRequest (8bit) |
| R6 | wValue (16bit) |
| R7 | wIndex (16bit) |