Service_USB 2 - Release USB device configuration setting — Application request to release USB device configuration setting
R0 | 2 (reason code) |
R1 | &80C00 (USB Service call) |
R2 | Pointer to controller structure |
R3 | Pointer to device structure |
All registers preserved to pass on, else
R0 | 0 to refuse access or 1 to cause a re-try later. |
R1 | 0 to claim or preserved to pass on. |
R2, R3 | preserved |
Must be broadcast by an application which wants to change the configuration of device to inform other applications using the device. If rejected with a 1 result the application may wait for a Service_USB 0 and can afterwards retry to do the change.