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OS_CallBack
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_CallBack
OS_CallBack
(SWI &15)
| Entry | |
|---|---|
| R0 | Address of the register save block, 0 to read |
| R1 | Address of the callback handler, 0 to read |
| Exit | |
|---|---|
| R0 | Address of previous register save block |
| R1 | Address of previous callback handler |
Use
The purpose of this call is to add a transient CallBack to the list.
Notes
This call is deprecated and should not be used. Please use OS_ChangeEnvironment instead. Internally, this SWI just calls OS_ChangeEnvironment
This sets up the address of the CallBack handler and the register save block, zero for either value meaning no change – hence you can read the current value.
For information on callbacks refer to OS_AddCallBack.