TMS320F28388D: IPC error CM to CPU1

PAk

Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

Hello.

I am seeing an issue with CM to CPU1 ipc messages.

I have used the example, from CPU1 to CM with no issues, and then I set up the other way on CPU1 with:

  //IPC
  //
  // Clear any IPC flags if set already
  //
   IPC_clearFlagLtoR(IPC_CPU1_L_CM_R, IPC_FLAG_ALL);


   
    IPC_registerInterrupt(IPC_CPU1_L_CM_R, IPC_INT2, IPC_ISR2);

    //
    // Synchronize both the cores.
    //
     IPC_sync(IPC_CPU1_L_CM_R, IPC_FLAG31);

And I am cycling sending from CPU1 to CM sending, and it is working fine. Using:

     IPC_sendCommand(IPC_CPU1_L_CM_R, IPC_FLAG0, IPC_ADDR_CORRECTION_ENABLE,
     IPC_CMD_READ_MEM, (uint32_t)readData, 10);

     //
      // Wait for acknowledgment
      //
      IPC_waitForAck(IPC_CPU1_L_CM_R, IPC_FLAG0);

      if(IPC_getResponse(IPC_CPU1_L_CM_R) == TEST_PASS)

Of course I am using different IPC_FLAGs. And if I remove on the CM side the IPC sending to CPU1, everything works fine again:

IPC_sendCommand(IPC_CM_L_CPU1_R, IPC_FLAG2, IPC_ADDR_CORRECTION_ENABLE, IPC_CMD_READ_MEM, buf_ipc_tx, 10);

//
// Wait for acknowledgment
//
IPC_waitForAck(IPC_CM_L_CPU1_R, IPC_FLAG2);


if(IPC_getResponse(IPC_CM_L_CPU1_R) == TEST_PASS){...}

The RX interrupt is triggered fine on CPU1, however once is triggered, the sending from CPU1 to CM is always waiting for the ACK. waiting in:

 while((IPC_Instance[ipcType].IPC_Flag_Ctr_Reg->IPC_FLG & flag) != 0U)

Is it necessary to sync ipcs again?

Please, would you mind to check it on your side, it seems to me a mistake in the library too.

Note: I tried via polling (without interrupt on CPU1) and it is working with the same code. Is it a driverlib issue?

Best Regards

over 5 years ago

0 Manoj Santha Mohan over 5 years ago

TI__Guru 55700 points

Pak,

We already have a ipc example (ipc_ex2_msgqueue_cm) which shows how CM sends IPC to CPU1.

<C2000Ware>\driverlib\f2838x\examples\c28x_cm\ipc

Regards,

Manoj

0 PAk over 5 years ago in reply to Manoj Santha Mohan

Mastermind 7025 points

Yhank you Manoj.

Un fortunately, there is not an Interrupt on CPU1 set to attend the Messages from IPC, and I think the problem comes from it.

We are attentind the flags on CPU1 by polling and works fine, while on an interrupt it waits forever.

Best regards

0 Manoj Santha Mohan over 5 years ago in reply to PAk

TI__Guru 55700 points

Which C2000Ware example code are you working?

Can you confirm whether I understand your question correctly?

CPU1 is able to trigger IPC interrupt on M4 side but you are not able to trigger IPC interrupt in C28x side. Which IPC event is used to trigger C28x IPC interrupt? For C28x core, only IPC0 - IPC3 can be configured to to trigger IPC interrupt. For M4 core, only IPC0-7 can be configured to trigger IPC interrupt

Regards,

Manoj

0 PAk over 5 years ago in reply to Manoj Santha Mohan

Mastermind 7025 points

IPC interrupt is triggered on the CPU1 side too, however, the CM is waiting forever in:

IPC_waitForAck(IPC_CM_L_CPU1_R, IPC_FLAG2);

while((IPC_Instance[ipcType].IPC_Flag_Ctr_Reg->IPC_FLG & flag) != 0U)

So CPU1 is not acknowledging the IPC

0 Manoj Santha Mohan over 5 years ago in reply to PAk

TI__Guru 55700 points

Okay.

Please let me know which C2000Ware example code are you working? I need to project name and path.

Regards,

Manoj

0 Manoj Santha Mohan over 5 years ago in reply to Manoj Santha Mohan

TI__Guru 55700 points

I haven't heard back from you in a while. Is this issue resolved? Can I close this thread?

0 PAk over 5 years ago in reply to Manoj Santha Mohan

Mastermind 7025 points

Sorry, I wrote the answer a few days back but for whatever reason it was not published.

I am based on the ethernet_ipc_ex1_basic_c28x1

Best regards

0 Manoj Santha Mohan over 5 years ago in reply to PAk

TI__Guru 55700 points

Are you running this example as it was released in C2000Ware (or) have you modified this example?

Did you start seeing the problem after you modified the example?

Regards,

Manoj

0 PAk over 5 years ago in reply to Manoj Santha Mohan

Mastermind 7025 points

Of course I had to modify it to create the CM to CPU1 IPC part.

The problem is the interrupt of IPC on the CPU1 side.

0 Manoj Santha Mohan over 5 years ago in reply to PAk

TI__Guru 55700 points

Pak,

Sorry, I missed this thread and couldn't reply for a while.

Is your CM code acknowledging IPC_FLAG2 as shown below.

IPC_ackFlagRtoL(IPC_CM_L_CPU1_R, IPC_FLAG2);

Regards,

Manoj

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28388D: IPC error CM to CPU1