Scheduler - 2021.2 English

Zynq UltraScale+ MPSoC Software Developer Guide

Document ID
Release Date
2021.2 English

A scheduler is required by modules like STL in order to support periodic tasks like register coverage, scrubbing, etc. PMU firmware also uses scheduler for LPD WDT functionality. This will be explained in the following section. PMU MicroBlaze has 4 PITs (0-3) and Scheduler uses PIT1. The scheduler supports up to 10 tasks. The following table shows the Scheduler’s task list data structure with members.

Table 1. Scheduler Data Structure Members
Member Values/Range Additional information
Task ID 0 0.. 9 0 - Highest priority
Interval Task interval in Milliseconds  
OwnerId 0.. 9 Modules that owns this task
Status Enabled/Disabled  
Callback Function pointer Default to NULL
Note: By default, scheduler functionality is disabled. To enable the same, ENABLE_SCHEDULER build flag needs to be defined.