CCSv5 Portable Hwi parameters

Kurt Jensen

Other Parts Discussed in Thread: SYSBIOS

sorry for the silly question but I do not understand how to configure the Portable Hwi for my interrupt and I cannot find any documentation.

I want to map USB0 interrupt 19 to DSP interrupt 4. Do I put 4 for the "Interrupt number" and 19 for "Event ID"?

Also, what does Interrupt priority -1 mean? Please explain the "Masking options"?

over 13 years ago

0 David Friedland over 13 years ago

TI__Mastermind 18320 points

Kurt,

What device is this question related to?

0 Steven Connell over 13 years ago

TI__Mastermind 45025 points

Hi Kurt Jensen,

Also, which version of BIOS are you using?

Steve

0 Kurt Jensen over 13 years ago in reply to Steven Connell

Genius 5040 points

c6748, DSP/BIOS 6

What about Hwi_eventMap? Should I just call Hwi_eventMap(4, 19) instead?

0 Steven Connell over 13 years ago in reply to Kurt Jensen

TI__Mastermind 45025 points

Kurt,

Ok. What you need to use is the EventCombiner module. This is used to map system events to CPU interrupts (Hwi). Should be something similar to the following:

var EventCombiner = xdc.useModule("ti.sysbios.family.c64p.EventCombiner");

// map Event Group 0 (events 0 - 31) to CPU interrupt 4

EventCombiner.eventGroupHwiNum[0] = 4;

You can find out more on the EventCombiner module in the CCS help for SYS/BIOS.

Steve

0 Kurt Jensen over 13 years ago in reply to Steven Connell

Genius 5040 points

Maybe my question was not clear. I am only mapping one interrupt.

The answer to my question is, set "Interrupt number" to 4, "Event Id" to 19, enable INT4 in the CPU, then call Hwi_enable(). Now I get interrupts

What does it mean to set "Interrupt priority" to -1? The Help file seems to imply that this parameter is "Not supported on this target".

0 Steven Connell over 13 years ago in reply to Kurt Jensen

TI__Mastermind 45025 points

Kurt,

That's correct, the priority parameter is not supported on C6748.

The -1 priority is used as the default for other targets that do use this parameter. When a configuration is processed, if the priority is still -1 (meaning the user didn't change it or manually set it to -1) it is either forced to be the highest priority value, or simply set to the value of the interrupt number (it's target dependent ... see the various versions of Hwi.xs under the ti/sysbios/family directory).

Steve

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CCSv5 Portable Hwi parameters