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Interrupt priority using DSP/BIOS

Xiaohan Chen
Prodigy 40 points 
Hi, I have some general questions about DSP/BIOS.

What is the interrupt priority including HWI, SWI, PRD and BIOS? Is 
CLK_F_isr() on timer0 has highest priority?
  • TI__Intellectual 1920 points

    The thread types (from highest to lowest priority) are:

     

    o Hardware interrupts (HWI): includes CLK functions

    o Software interrupts (SWI): includes PRD functions

    o Tasks (TSK)

    o Background thread (IDL)

     

    As you can see the PRDs priority is configured in the SWI module by changing the PRD_swi priority level (PRD_swi appears in the SWI list when you have at least one PRD inserted).  CLK_F_isr() is configured as a HWI, see page 92 of the document below for more information. All HWI objects are listed in order of priority, from the highest to the lowest priority interrupt. 

     

     http://focus.ti.com/lit/ug/spru303b/spru303b.pdf - see also pages 79,88.89