A fast and easily customised operating system
for ARM devices
Post Filter Code
Programmer's Reference Manuals
» Part 7 - The Desktop
» The Filter Manager
» SWI Calls
» Filter_RegisterPostFilter
» Post Filter Code
| Entry | |
|---|---|
| R0 | Event reason code being returned for Post Filters |
| R1 | Users event buffer |
| R2 | Task handle of task that called Wimp_Poll |
| R3 | Pointer to poll word if applicable |
| R12 | Value of R2 when filter registered |
| Exit |
|---|
| It must preserve all registers (other than R0) |
Notes
You may modify the reason code in R0 and the contents of the buffer pointed to by R0 to provide a new event. Return R0 = -1 to prevent event being passed to task.
Please note: You must preserve all other registers (other than R0).