AWR6443: Interrupt process on AWR6443

Andy Yin

Part Number: AWR6443
Other Parts Discussed in Thread: SYSBIOS,

Hi,

Read the AWR6443 TRM and sysbios HWI source code in ti\sysbios\family\arm\v7r\vim, still not clear on the FIQ/IRQ process. Here need your help on below questions.

(1)According to AWR6443 user manual, it have the description like "By hardware, Non Maskable FIQ are not reentrant." but no information about IRQ. IRQ handler is implemented by TI drivers.

So FIQ cannot be nested, how about IRQ? Can you confirm that IRQ is disabled during all the execution of IRQ handler and re-entrant IRQ is not possible ?

(2)As we all known that, whether it is category 1 interrupt or category 2 interrupt, there will be latency time. I think that interrupt latency depends on TI interrupt handler implementation and configuration. So can you confirm this point? What is the maximum latency time of category 1 and category 2 interrupts ?

Andy

Thanks.

over 2 years ago

0 Kevin Ortiz over 2 years ago

TI__Expert 3525 points

Hi Andy,

I am looking on this. I will update by end of week.

Best Regards,

Kevin

0 Andy Yin over 2 years ago in reply to Kevin Ortiz

TI__Genius 9390 points

Kevin,

Actually customer and i already have checked the VIM implementation in sysbios, but not found the answer, so came here to look for help. It is about whether the IRQ/FIQ is nested or not, and how about the interrupt latency. Any unclear let me know in time. Look forward to your reply, thanks.

Andy

0 Kevin Ortiz over 2 years ago in reply to Andy Yin

TI__Expert 3525 points

Hi Andy,

Thank you for the additional information. This is helpful! I will update you shortly.

Best Regards,

Kevin

0 Andy Yin over 2 years ago in reply to Kevin Ortiz

TI__Genius 9390 points

Kevin,

Any update here, still be looking forward to your reply soon. Pls help reply by Tuesday your time, thanks.

Andy

0 Kevin Ortiz over 2 years ago

TI__Expert 3525 points

Hi Andy,

I am sorry for the delay on updating this thread. I was on vacation last week.

The behavior should be the same behavior as any TI RTOS device using sysbios A potential example of nesting can be found: HERE.

The following video series on getting started with TI RTOS might also be helpful. https://www.ti.com/video/series/getting-started-ti-rtos.html

Best Regards,

Kevin

0 Kevin Ortiz over 2 years ago in reply to Kevin Ortiz

TI__Expert 3525 points

Hi Andy,

Again, apologies for the delay. Some of these queries required information on dependencies outside of radar. Please see updates below.

TI_RTOS supports interrupt nesting. It is usually configuration param in the Hwi Module.

As per TI_RTOS documentation nesting is enabled by default. You can check

For c67x you can check
Hwi_dispatcherAutoNestingSupport;

ti.sysbios.family.arm.v7r.vim.Hwi should be the HWI module for Gen 1 devices.

In which case it also supports

Hwi_dispatcherAutoNestingSupport;

You can also set ti.sysbios.hal.Hwi and the Hwi_dispatcherAutoNestingSupport and it should take effect

Best Regards,

Kevin

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AWR6443: Interrupt process on AWR6443