DeviceDriver_Entry 3 (changes)
Showing changes from revision #0 to #1:
Added | Removed | Changed
DeviceFS
» DeviceDriver_Entry
» DeviceDriver_Entry 3
DeviceDriver_Entry 3
(SWI -)
| Entry | |
|---|---|
| R0 | 3 (Wake up for RX) |
| R2 | DeviceFS stream handle |
| Exit | |
|---|---|
| - | - |
Use
This entry point is called when DeviceFS wants data from the device.
Notes
You should call DeviceFS_ReceivedCharacter as bytes become available. This will unblock any task waiting on data being returned.
This call is not applicable to all device drivers; most interrupt-driven buffered device drivers would be ready to receive data at any time.
See also
Social
Follow us on
and
and
ROOL Store
Buy RISC OS Open merchandise here, including SD cards for Raspberry Pi and more.