RM44L520: Data Abort When using sciSend()

Andrew Mercer

Part Number: RM44L520

Hello all,

I am currently trying to add serial print statements to some of my tasks but for some reason when I try to add some statements to one task in particular I keep getting Data Aborts. I have pasted the code that seems to be causing the issue below:

sprintf(str1,"(UV) ");
sciSend(scilinREG, 5, (uint8_t *) str1);
sprintf(str1,"UVSelfCheckError/TotalTestComplete: ");
sciSend(scilinREG, 36, (uint8_t *) str1);

The Instruction Fault Address points to strlen's implementation which is strange considering I am not using that function here. I have removed this code and everything works fine so I still think that this is what is causing the issue. I have also tried making this section of the task a critical section to make sure the issue isn't due to context switching and made sure that str1 is only accessible by this one task with no luck. If anyone has any ideas I'm all ears.

Thanks

over 3 years ago

0 jagadish gundavarapu over 3 years ago

TI__Guru 73216 points

Hi Andrew,

Just now i tested your code on RM46

I don't see any issues with this code and it worked fine for me

Can you please make sure that you declared str1 with min size of 36?

Thanks & Regards,
Jagadish.

0 Andrew Mercer over 3 years ago in reply to jagadish gundavarapu

Prodigy 170 points

I did declare str1 with a min size of 36.

0 jagadish gundavarapu over 3 years ago in reply to Andrew Mercer

TI__Guru 73216 points

Hi Andrew,

I don’t have any board with RM44 controller, so can you please create a new project with only sci peripheral and can you please test it with only above four lines you shared with after sci_init function.

If you test above thing we can get clarity that whether it is a controller dependency or any other peripheral wise dependency.

—

Thanks,

Jagadish.

0 Andrew Mercer over 3 years ago in reply to jagadish gundavarapu

Prodigy 170 points

I have working serial print statements elsewhere in the project and they work correctly. It seems to only be an issue in this task.

0 Chester Gillon over 3 years ago in reply to Andrew Mercer

Guru 92251 points

Andrew Mercer said:
It seems to only be an issue in this task.

Perhaps the task with the issue doesn't have sufficient stack space. Can you try increasing the stack size and/or check for stack overflow?

You mention the term "task" which suggests use of some RTOS.

0 Andrew Mercer over 3 years ago in reply to Chester Gillon

Prodigy 170 points

I am using FreeRTOS, that is correct. I have tried increasing the tasks stack space with no luck. How would I go about checking for a stack overflow? I imagine there is an ARM register I can monitor.

0 Chester Gillon over 3 years ago in reply to Andrew Mercer

Guru 92251 points

Andrew Mercer said:
How would I go about checking for a stack overflow?

I haven't tested it, but Stack Usage and Stack Overflow Checking has some information for FreeRTOS.

0 Andrew Mercer over 3 years ago in reply to Chester Gillon

Prodigy 170 points

I increased the stack size considerably and this issue remains unfortunately.

0 jagadish gundavarapu over 2 years ago in reply to Andrew Mercer

TI__Guru 73216 points

Hi Andrew,

Can you please refer below thread,

(6) TMS570LS1224: Is there any tools for monitoring TMS570 stack/heap memory consumption, performance measurement, etc? - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

Thanks & Regards,
Jagadish.

+1 jagadish gundavarapu over 2 years ago in reply to jagadish gundavarapu

TI__Guru 73216 points

Hi Andrew,

I just created one new LED Blinky project with FREE RTOS

And the default configMINIMAL_STACK_SIZE value for the vTask1 is 128, and when i test with this configuration i don't get any error and project worked perfectly, later i changed this value to the 32 then i got _dabort error

So, may be same issue with your code can you please increase this value and test it?

Thanks & Regards,
Jagadish.

0 Andrew Mercer over 2 years ago in reply to jagadish gundavarapu

Prodigy 170 points

My minimal stack size is currently 128 and the issue remains. I also tried increasing it to 256 with no change.

0 jagadish gundavarapu over 2 years ago in reply to Andrew Mercer

TI__Guru 73216 points

HI Andrew,

Can you please try with 512 value ?

Thanks,
Jagadish.

0 Andrew Mercer over 2 years ago in reply to jagadish gundavarapu

Prodigy 170 points

Still nothing unfortunately.

0 Andrew Mercer over 2 years ago in reply to Andrew Mercer

Prodigy 170 points

I have increased the the FreeRTOS total heap size to 102400 and increased the minimal stack size to 512. I have also increased the stack size of the task in question by a significant amount. I then tried to just send a single string with the spisend call as shown below:

sciSend(scilinREG, 5, (unsigned char *)"(UV) ");

This resulted in the message being sent once and then causing the data abort when it tries to print again later. Normally I have been seeing the data abort on the first attempt to print.

0 jagadish gundavarapu over 2 years ago in reply to Andrew Mercer

TI__Guru 73216 points

Hi Andrew,

Sorry for the delay, i am on vacation.

Are you still stuck with this issue?

0 Andrew Mercer over 2 years ago in reply to jagadish gundavarapu

Prodigy 170 points

No worries, I was as well. I am still having this issue.

0 jagadish gundavarapu over 2 years ago in reply to Andrew Mercer

TI__Guru 73216 points

Hi Andrew,

Is it possible to you to share your project?

If not possible, can you please create a new minimal project with the issue you are facing? This will helpful for us to debug the issue at our end.

Thanks & Regards,

Jagadish.

0 jagadish gundavarapu over 2 years ago in reply to jagadish gundavarapu

TI__Guru 73216 points

Hi,

Closing the thread because of not hearing back from so long.

Thanks & regards,
Jagadish.