Download 8051 RTOS

Alarms
The OSEK/VDX implementation defines the following system constants related to the system timer:
• OSMAXALLOWEDVALUE
This value determines the upper limit for the timer value unit.
• OSTICKSPERBASE
This value determines how many clock ticks constitute a timer unit.
• OSMINCYCLE
This value represents an absolute minimum for the possible expiring times of system alarms. You
can set alarms which actions are meant to happen after OSMINCYCLE time units.
• OSTICKDURATION
The timer duration in nanoseconds.
• OSTICKDURATIONINMSCS
The timer tick duration in miliseconds.
The values for these parameters depend on the RTOS implementation. You can look them up in
Appendix A, Implementation Parameters.
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