RT_ReadInfo (changes)
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RTSupport
» SWI Calls
» RT_ReadInfo
RT_ReadInfo
(SWI &575C5)
Read status information
| Entry | |
|---|---|
| R0 | reason code |
| Exit | |
|---|---|
| R0 | value |
| - | All other registers are preserved |
| V flag is set if the reason code was not recognised |
Interrupts
- Interrupt state is unchanged
- Fast interrupts are enabled
Processor Mode
- Processor is in SVC mode
Re-entrancy
- SWI is re-entrant
Use
This SWI enables you to read current state variables.
Reason codes currently defined are:
| Reason | Meaning |
|---|---|
| 0 | RTSupport handle for current routine, or |
| 0 if in foreground, or | |
| -1 if in interrupt context | |
| 1 | Priority setting (integer value) of current routine, or -1 if in interrupt context |
| 2 | Base address of SVC stack for real-time routines |
See also
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