CC2564MODA: CC256XSTBTBLESW v4.0.2.2 with FreeRTOS Close Stack problems

Hi Michele,

Do you see these commands when you begin the demo?

Can you try running CloseSink()?

Thanks,
Jacob

Hi Michele,

As you probably saw, CloseStack() calls BSC_Shutdown(), which closes the Bluetooth protocol stack. The stack can be re-opened with a BSC_Initialize() call. 

I'll look to see if there are other options and get back to you next week. 

Thanks,
Jacob

Good morning Jacob

what you write is exactly what I do, the problem is that CloseStack () / BSC_Shutdown () / BTPS_DeInit () don't work correctly:

1_ Does not close all the tasks that the Stack opens, such as TimerThread () and HCICallbackTread ()

2_ It does not close other FreeRTOS objects that are opened, such as KernelMutex

3_ It does not correctly re-initialize the memory of the various parts of the library, so even calling BSC_Initialize () the Stack does not reopen correctly

I managed to reopen the Stack by closing Task and other parts through my code and cleaning up by hand in debug parts of memory that I do not know what they correspond to because of the library, but this is not the way to operate, CloseStack () must do this.

I believe that if your firmware developer tries to do CloseStack () and then BSC_Initialize () it can verify this.

I am currently using FreeRTOS Kernel V10.3.1 in my project.

Thanks

Hi Michele,

I'll follow up with more suggestions here by Friday.

Thanks,
Jacob

Good morning Jacob

In these days I continued to do Bluetooth tests and today I saw something that could help us, in solving the problems I wrote to you in the previous messages.

I saw this:

1_ If I open the Bluetooth Stack and close it without doing anything, the Stack does not close correctly and it is not possible to reopen it.

2_ If I open the Bluetooth Stack, I pair the device with my mobile phone, then I unpair it and close the Stack, the Stack does not close correctly and it is not possible to reopen it.

3_ If I open the Bluetooth Stack, I pair the device with my mobile phone and then I close the Stack with the paired device, the Stack closes correctly and it is possible to reopen it.

It seems that the Stack program needs the device to be paired to close properly.

I hope this information will be of help to you

Bye

Michele

Hey Michele,

Thanks for the follow up. My plan to test this is to modify the A3DP Sink Demo and try closing (CloseStack) and reopening the stack (BSC_Initialize). I'll also see if I can replicate your steps above with device pairing. I'll try to follow up tomorrow, but it may be Friday before I respond.

Thanks,
Jacob 

Sorry jacob or hit the wrong button and don't reply.

Yes, in my CloseStack () there is both BSC_Shutdown () and BTPS_DeInit (), but the problem is definitely in BSC_Shutdown ().

 I can't see the library code, but there is probably a control that prevents the stack from closing under certain conditions.

In BTPS_DeInit (), I added the KernelMutex shutdown, if not it stayed hanging.

Sorry but I can't help you further, I don't see the code of BSC_Shutdown ().

Bye

Michele

Hi Michele,

That is alright, this is helpful. I will try adding the KernelMutex shutdown to my code.

Thanks,
Jacob

Hi Jacob

how are you

Do you have any news for me?

Thanks

Michele

Hi Michele,

No more updates yet, I will follow up more tomorrow.

Thanks,
Jacob

Hi Michele,

Can you try this code snippet from another E2E thread to see if this solves your issue? It shows an example of how to properly close and reinitialize the Bluetooth stack.

if(BluetoothStackID)
{
/* Simply close the Stack */
BSC_Shutdown(BluetoothStackID);

Display(("Stack Shutdown.\r\n"));

/* Flag that the Stack is no longer initialized. */
BluetoothStackID = 0;

/* Flag success to the caller. */
ret_val = 0;
}
else
{
/* A valid Stack ID does not exist, inform to user. */
ret_val = UNABLE_TO_INITIALIZE_STACK;
}

And here is our code snippet for Initialize

if((HCI_DriverInformationCopy))
{
Display(("\r\n"));
Result = BSC_Initialize(HCI_DriverInformationCopy, 0);
Display(("Result: %d\r\n", Result));
if(Result > 0)
{
/* The Stack was initialized successfully, inform the user */
/* and set the return value of the initialization function */
/* to the Bluetooth Stack ID. */
BluetoothStackID = Result;
Display(("Bluetooth Stack ID: %d\r\n", BluetoothStackID));

}
else
{
/* The Stack was NOT initialized successfully, inform the */
/* user and set the return value of the initialization */
/* function to an error. */
DisplayFunctionError("Stack Init", Result);

BluetoothStackID = 0;

ret_val = UNABLE_TO_INITIALIZE_STACK;
}
}

Thanks,
Jacob

Hi Michele,

I am trying a new solution and will get back to you tomorrow after testing.

Thanks,
Jacob

Hi Michele,

I believe the OpenStack and CloseStack calls are working correctly. I think the -4 error you saw referred to a function error in the audio sink  initialization, not an HCI initialization error. You must specify the AUDInitialized variable to be false in the CloseStack routine to ensure the sink is reinitialized during the Initialize_Sink routine. 

With the code below, I am able to close the stack, open the stack, and perform BT functions like an inquiry. 

int CloseStackCommand(ParameterList_t *TempParam)
{
    int ret_val = -1;
    if(BluetoothStackID)
    {
        /* Simply close the Stack */
        BSC_Shutdown(BluetoothStackID);

        Display(("Stack Shutdown.\r\n"));

        /* Flag that the Stack is no longer initialized. */
        BluetoothStackID = 0;
        AUDInitialized = FALSE;
        /* Flag success to the caller. */
        ret_val = 0;
    }
    else
    {
        /* A valid Stack ID does not exist, inform to user. */
        ret_val = UNABLE_TO_INITIALIZE_STACK;
    }
    return ret_val;
}

 int OpenStackCommand(ParameterList_t *TempParam)
{
  int ret_val = -1;
    Display(("\r\n"));
    int Result = OpenStack(&HCI_DriverInformation, &BTPS_Initialization);
    Display(("Result: %d\r\n", Result));
    if(Result >= 0)
    {
        /* The Stack was initialized successfully, inform the user */
        /* and set the return value of the initialization function */
        /* to the Bluetooth Stack ID. */
        ret_val = 0;
        //BluetoothStackID = Result;
        Display(("Open Stack Successfully - BT Stack ID: %d\r\n", BluetoothStackID));
    }
    else
    {
        /* The Stack was NOT initialized successfully, inform the */
        /* user and set the return value of the initialization */
        /* function to an error. */
        DisplayFunctionError("Stack Init", Result);
        BluetoothStackID = 0;
        ret_val = UNABLE_TO_INITIALIZE_STACK;
    }
    return ret_val;
}

Can you try this solution?

Thanks,
Jacob

Great to hear it Michele, this is an excellent response. I'm sure future users will appreciate the advice you shared that solved the CloseStack issue.

I'd personally give you +50 points for this issue, but TI handles the point scoring according to this chart.

Thank you for your contribution,

Jacob