RTOS/EVMK2G: Is there a working example for using McASP with onboard CODEC?

Ron Menelli

Part Number: EVMK2G
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

Hello, I'm trying to get up and running on a new EVMK2G. I've been able to run the basic Hello World stuff, but I've been unable to get an McASP demo working from the PDK directory. I used pdkprojectcreate to generate the McASP demo projects. I've been focusing on the MCASP_Audio_evmK2G_armExampleProject. It compiles and runs, but doesn't do anything. A quick look at the code reveals this:

#if defined (SOC_J721E)
    Task_Params taskParams;
    Task_Handle taskHandle;
    Error_Block eb;

    Task_Params_init(&taskParams);
    taskParams.stackSize = 0x4000;
    taskParams.priority = 5;
    taskParams.instance->name = "Audio_echo_Task";

    taskHandle = Task_create((ti_sysbios_knl_Task_FuncPtr)Audio_echo_Task,
                             &taskParams, &eb);

    if (NULL == taskHandle)
    {
        Log_info0("\r\nFailed to create Audio echo task!\n");
        BIOS_exit(0);
    }

#endif

So, on a K2G, the task initializing code gets ifdefed out. Getting rid of the ifdef/endif results in code that compiles, but task create fails with a memory error:

[CortexA15] ti.sysbios.heaps.HeapMem: line 221: out of memory: handle=0x80042d2c, size=16384

xdc.runtime.Memory: line 52: out of memory: heap=0x0, size=16384

I haven't yet dug into it to see what's going on, but I'm hoping there's a working example out there I can start with? I can only findaudio examples using the audio daughter board, which I currently don't have (and don't really need - stereo in/out is all I need).

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

Hi Ron,

Have you checked the Processor SDK RTOS documentation on McASP:

Best Regards,
Yordan

0 Rahul Prabhu over 6 years ago

TI__Guru** 116840 points

Ron,

Please indicate the version for the Processor SDK RTOS that you are using. The code that you are highlighting is not required for K2G because the audio_echo_task is launch from the AudioLoopback.cfg using the following syntax :

var task0Params = new Task.Params();
task0Params.priority = 5;
task0Params.instance.name = "task0";

Program.global.task0 = Task.create("&Audio_echo_Task", task0Params);

Can you please confirm that you have setup the K2G EVM as described in the article here:

http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/How_to_Guides_Hardware_Setup_with_CCS.html#ak2gx-gp-evm-hardware-setup

The example relies on the GEL initialization script to setup the clocks and to ensure that the board is configured in No boot mode so there is no firmware loaded during the boot process.

Also, please indicate what your test setup looks like. Are you connecting a stereo cable to Line in and a head phone or speaker to the Line out port on the EVM.

Regards,

Rahul

0 Ron Menelli over 6 years ago in reply to Rahul Prabhu

Prodigy 30 points

Thanks very much, I guess I still have much to learn about this environment. I wasn't expecting the task to be started by something other than the C code. I will check my audio connections - that could easily be the problem.

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RTOS/EVMK2G: Is there a working example for using McASP with onboard CODEC?