CCS: MessageQ communication between ARM to DSP

Mohan K S

Tool/software: Code Composer Studio

Hii all,

I am currently working on messageQ. I am facing a problem with messageQ_open in DSP side .I am running DSP on BIOS and ARM on linux. I am creating the messageQ in the ARM side, in ARM side its successfully creating the messageQ. But the thing is If I try to open the created messageQ in the DSP side I am getting the status value -11 i.e messageQ not found. So what I thought is may be ARM is not syncing with the DSP.

Can anyone help me how to sync the ARM with DSP....?

ARM code:

status = Ipc_start();

if (status < 0) {
printf("Error: failed to initialize IPC, error=%d\n", status);
}
printf("App_setup: IPC ready, status=%d\n", status);

MessageQ_Params_init(&msgqParams);

messageQ = MessageQ_create("CORE0", &msgqParams);
if( messageQ == NULL )
{
printf("MessageQ_create failed\n");
}

DSP code:

do {
status = MessageQ_open("CORE0", &msgQueueId); //STEP-3
if (status < 0){
Task_sleep(1);
}

ipc version: ipc_3_35_01_07

xdc version: xdctools_3_30_05_60

bios version : bios_6_41_00_26

arm compiler: /opt/gcc-linaro-arm-linux-gnueabihf-4.7-2013.03-20130313_linux

device: evmTCI6630K2L

I am attaching my config file also please check the config file and if have done any mistake in config file please inform me ..

arm_dsp.cfg

Thanks and Regards

Mohan

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

Hi Mohan,

Have you checked the IPC examples provided in Processor SDK Linux (RTOS)?

Best Regards,
Yordan

0 Mohan K S over 6 years ago in reply to Yordan Kovachev

Intellectual 260 points

Hi Yordan,

Thank you for your reply....

Have u checked my config file...?

Yes I have gone through example code. But I want a simple messageQ code only putting and getting the messages.

1) Can u please explain me how DSP knows that the messageQ created in the ARM side..... ?

2) what is the importance of Transport QMSS in ARM to DSP communication....?

Thank you

Mohan

0 Mohan K S over 6 years ago in reply to Yordan Kovachev

Intellectual 260 points

Hi Yordan,

I have one more doubt.

I am creating binary for DSP in windows and creating binary for ARM in linux because, I don't have the CCS in linux.

Is that fine creating the DSP binary in windows...?

Should I create binary for DSP in linux...?

Thank you

Mohan

0 Yordan Kovachev over 6 years ago in reply to Mohan K S

TI__Guru**** 161600 points

Hi,

I am creating binary for DSP in windows and creating binary for ARM in linux because, I don't have the CCS in linux.
Is that fine creating the DSP binary in windows...?

Never tested this, as my host PC is linux, but this shouldn't be a problem I think.

Best Regards,
Yordan

0 Mohan K S over 6 years ago in reply to Yordan Kovachev

Intellectual 260 points

Hi Yordan,

Thank you for your reply....

Have u checked my config file...?

1) Can u please explain me how DSP knows that the messageQ created in the ARM side..... ?

2) what is the importance of Transport QMSS in ARM to DSP communication....?

3) Should I use IpcProcSync_ALL to sync ARM with DSP.....?

Thank you

Mohan

0 Sahin Okur over 6 years ago in reply to Mohan K S

TI__Mastermind 27355 points

Hi Mohan,

1. The DSP creates a local messageQ and waits for a message using messageQ_get(). The ARM then opens the DSP's messageQ using the unique messageQ name and sends the message. The DSP then retrieves the ARM's messageQ id from the message using MessageQ_getReplyQueue() - this is how it learns of the ARM's messageQ.

Please let me know if this doesn't make sense.

I've attached IPC training slides below which should also help you better understand the IPC flow.

IPC_Training_2_21.pdf

2. Information on IPC transports can be found at the link below. The recommended transport for ARM Linux to DSP RTOS is the Rpmsg transport.

http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_Foundational_Components.html#ipc-transports

3. If you use Sync_ALL you will need to ensure the procNameAry is configured so that only the cores you are using are specified, otherwise your application will spin inside Ipc_start() waiting for the other cores - it sounds like you are getting passed Ipc_start() so whatever you already have should be fine.

Have you taken a look at the messageQ example for reference? It should help you figure out if you have anything missing. The example can be found inside Processor SDK RTOS at ~\ti\ipc_x_xx_xx_xx\examples\TCI6636_linux_elf\

I hope this helps. Please let me know if you have any questions.

Best,
Sahin

0 Mohan K S over 6 years ago in reply to Sahin Okur

Intellectual 260 points

Hii Sahin,

Thank you for your reply Sahin.

1) I have tried creating the messageQ in DSP side and I am trying to open in ARM side but I am getting the status value -11.created messageQ in DSP side is not found by ARM.

3) In the config file I have given as below then also while running Ipc_start() is entering to a infinite loop.

var MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
MultiProc.setConfig("CORE0", ["HOST", "CORE0"]);
Ipc.procSync = Ipc.ProcSync_ALL;

Thank you

Mohan

0 Mohan K S over 6 years ago in reply to Sahin Okur

Intellectual 260 points

Hii Sahin,

I worked on the "\ti\ipc_x_xx_xx_xx\examples\TCI6636_linux_elf\ex44_compute" example project. I have created binary for both ARM and DSP in linux. Even I run that binaries on the c6638K2K board its working fine.

Now I want create binary for dsp in windows CCSv6 and binary for ARM in linux with the same example project.

1) Can I create a binary for dsp in ex44_compute project using windows CCSv6.....?

if it is possible can u please attch the steps to create binary in windows CCSv6...

Thanks n Regards

Mohan

0 Sahin Okur over 6 years ago in reply to Mohan K S

TI__Mastermind 27355 points

Hi Mohan,

I see you have created another thread for this issue: https://e2e.ti.com/support/tools/ccs/f/81/t/840125

Let us continue the discussion in that thread. I'll go ahead and close this one.

Regards,
Sahin

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CCS: MessageQ communication between ARM to DSP