RTOS/TMS320F28377S: SYSBIOS HWI and CAN Interrupts

Jegan Eugin

Part Number: TMS320F28377S
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

I use interrupts to receive CAN messages. The CAN interrupts are working, if I am not using sys/bios. If I use sys/bios, I receive only one interrupt to process incoming message. Then the control goes to Hwi_unPluggedInterrupt().

It's look like I am missing some configuration. I read TI-RTOS document, it talks about creating HWI,SWI and blink LED's. But, it is not talking about HWI and CAN interrupts.

(Ex: CAN_enableInterrupt(CANA_BASE, CAN_INT_IE0 | CAN_INT_ERROR | CAN_INT_STATUS) , CAN_enableGlobalInterrupt(CANA_BASE, CAN_GLOBAL_INT_CANINT0); )

It will be nice, if I get any reference document about how to use sys/bios and driverlib together with interrupts.

Thanks

over 7 years ago

0 ToddMullanix over 7 years ago

TI__Guru* 96960 points

Hi Jegan,

Sorry for the delay. The hand-off on handling forum threads did not go smoothly during a vacation.

Is this still a problem?

You'll need to use the Hwi module to plug the CAN interrupt instead of the driverlib calls.

Todd

0 Jegan Eugin over 7 years ago in reply to ToddMullanix

Prodigy 140 points

Hi Todd,

No problem.

Yes, I still have this problem.

I have a CAN HWI interrupt hwiCANA0() to receive all incoming CAN messages (interrupt number 100). Is that enough?

How can I add CAN_INT_IE0, CAN_INT_ERROR and CAN_INT_STATUS to the above hwi interrupt call?

Thanks

0 ToddMullanix over 7 years ago in reply to Jegan Eugin

TI__Guru* 96960 points

Are you using Interrupt_register? If so, you need to use Hwi_create instead.

0 Jegan Eugin over 7 years ago in reply to ToddMullanix

Prodigy 140 points

Yes, I am already using Hwi.create.
But, I need a clear integration details for driverlib and sys/bios.

0 ToddMullanix over 7 years ago in reply to Jegan Eugin

TI__Guru* 96960 points

Which interrupt is saying it's unplugged?

0 Jegan Eugin over 7 years ago in reply to ToddMullanix

Prodigy 140 points

I couldn't able to do stepping through Hwi_unPluggedInterrupt(). The intNum is showing 1024.
I don't know how much that is true. The debug control just stops at "{".

0 ToddMullanix over 7 years ago in reply to Jegan Eugin

TI__Guru* 96960 points

Before the first CAN interrupt fires, but after it is created, can you look at Tools->ROV->Hwi to see the state of the interrupts. Also make sure the system stack is big enough (under the Hwi->Module view). After the CAN interrupt has fired, can you check the state of the interrupts and stack?

0 Jegan Eugin over 7 years ago in reply to ToddMullanix

Prodigy 140 points

I checked the interrupt and stack status. Below are my findings,

Once the interrupt fired, irp changes from 0x0 to 0x89e86
stack peak went to 102 and stack size is 256.
if(status == CAN_INT_INT0ID_STATUS)
{
//
// Read the controller status.
//
status = CAN_getStatus(CANA_BASE);

//
// Check to see if an error occurred.
//
if(((status & ~(CAN_STATUS_RXOK)) != CAN_STATUS_LEC_MSK) &&
((status & ~(CAN_STATUS_RXOK)) != CAN_STATUS_LEC_NONE))
{
//
// Set a flag to indicate some errors may have occurred.
//
errorFlag = 1;
}
}

The above code got executed and at the end of the closing "}", the control goes to
dispatch$:

; save xar4
movl *sp++, xar4

; Hwi_dispatchCore(intNum)
movl acc, xar5
lcr #_ti_sysbios_family_c28_Hwi_dispatchCore__I

; restore xar4
movl xar4, *--sp

and executes this dispatch.

After this, the control is not moving anywhere.

-AJ

0 ToddMullanix over 7 years ago in reply to Jegan Eugin

TI__Guru* 96960 points

Sorry for the delay. Did this get resolved?

0 Jegan Eugin over 7 years ago in reply to ToddMullanix

Prodigy 140 points

Currently we have planned to use non-bios version and it is working.

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RTOS/TMS320F28377S: SYSBIOS HWI and CAN Interrupts