DeviceDriver_Entry 10 (changes)
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DeviceFS
» DeviceDriver_Entry
» DeviceDriver_Entry 10
DeviceDriver_Entry 10
(SWI -)
| Entry | |
|---|---|
| R0 | 10 (End of data) |
| R2 | DeviceFS stream handle |
| R3 | -1 |
| Exit | |
|---|---|
| R3 | 0 if not end of data, or |
| -1 if end of data |
Use
This entry point is called when DeviceFS is asked if EOF has been reached, it will respond false if a buffered stream still has buffered data, or an unbuffered stream has a non-empty RX/TX word. Otherwise it calls this entry point.
Notes
Most devices will return -1 (EOF reached) but some (e.g. a scanner) may know that there is still data to come).
See also
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