TMS320F28388D: IPC causing memory access fault

Felisa Sze

Hello,

I'm seeing a M4 Bus Fault from the CM when it calls IPC_isFlagBusyRtoL() due to the IPC_Instance (both in ipc.h) referencing an inaccessible address.

Bus fault address:

The call is "IPC_isFlagBusyRtoL(IPC_CM_L_CPU2_R, IPC_NAV_NOTIFY_COMM_UPDATE)", IPC_NAV_NOTIFY_COMM_UPDATE = 2

It's faulting at IPC_StS, address 0x20202024:

This address isn't defined in memory, however:

Any idea why it's trying to reference there?

-Felisa

over 3 years ago

0 Manoj Santha Mohan over 3 years ago

TI__Guru 55700 points

Felisa,

From your description, it looks like you are trying to access CMTOCPU2IPCSTS register? Correct? If so, it should access 0x400FD082.

Single step through your code and check whether you are witnessing stack corruption.

Regards,

Manoj

0 Felisa Sze over 3 years ago in reply to Manoj Santha Mohan

Prodigy 10 points

Manoj,

It's 0x400FD084 but that does seem to be it. The address is fine until it hits any print statement including a variable, at which point the address changes to 0x20202024 and it faults out. I need to figure that out, but this gives me a place to start.

-Felisa

+1 Manoj Santha Mohan over 3 years ago in reply to Felisa Sze

TI__Guru 55700 points

Felisa,

Only way to debug such issues is to single step through the code to understand why you see correction. Did you try increasing the stack size in CM side?

Regards,

Manoj

0 Felisa Sze over 3 years ago in reply to Manoj Santha Mohan

Prodigy 10 points

Manoj,

I hadn't, but increasing the stack size from 512 to 1024 bytes looks to have fixed the problem. I'm not getting the incorrect memory address anymore when running normally.

I'll mark this as resolved. Thank you for your help.

-Felisa

0 Manoj Santha Mohan over 3 years ago in reply to Felisa Sze

TI__Guru 55700 points

Good to know. Closing this thread

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TMS320F28388D: IPC causing memory access fault