TDA4VM: IPC commucaiton running and program abort（SDK7.3）

shuwan zheng

Prodigy 230 points

Part Number: TDA4VM
Other Parts Discussed in Thread: SYSBIOS

Hello, TI

In our program using SDK 7.3, when tesing IPC Communication, finded C71 abort.

1. In CCS environment, using emulator and get stack information, as fllows.

2. Then, looking disassembly and function file information, as follows.

3. Also, find sysbios code, and find the line code, as follows.

the line 284, is "hwiKey = Hwi_disable();"

4. Last, using SP register and find statck information, find the stack information, as follows:

ti_sysbios_knl_Semaphore_pend__E
SemaphoreP_pend
Ipc_osalMutexLock
RPMessage_recv
appIpcRpmsgRxTaskMain

5. Questions， I don't why the SemaphoreP_pend can cause abort in function Hwi_disable, need TI help us, thanks.

over 3 years ago

0 Brijesh Jadav over 3 years ago

TI__Guru**** 495035 points

Hi,

It is not recommended to call semaphore_pend after Hwi_disable. Hwi_disable anyway disables interrupt, so no other process can come and access critical section.. If you require require Semaphore_pend, please move it outside of Hwi_disable/enable section.

Regards,

Brijesh

0 shuwan zheng over 3 years ago

Prodigy 230 points

Hi，

In our code, no calling semaphore_pend after Hwi_disable. The abort happed in line 284 of function semaphore_pend and the position is function Hwi_disable.