LAUNCHXL-CC1352R1: Message queue not working.

Alexis LECOQ

Hi,

I'm trying to communicate between tasks using tirtos7. I've followed this tutorial : https://dev.ti.com/tirex/explore/node?node=A__ATOcjUy6zyynCMWH-Ys6Ng__com.ti.SIMPLELINK_ACADEMY_CC13XX_CC26XX_SDK__AfkT0vQ__LATEST&search=queues

I can compile and flash without any problem but when i it get to mq_receive or mq_send nothing happens. If i stop the program I see that it is stuck in Error_raiseX() especially in this error :

if (Error_policy_D == Error_SPIN) {
for(;;) {
}
}

Do you have any clue where I could be wrong ?

Message queue init :

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    mqAttrs.mq_maxmsg = MSG_NUM;
    mqAttrs.mq_msgsize = MSG_SIZE;
    mqAttrs.mq_flags = 0;
    mqdes = mq_open ("alarm", O_RDWR | O_CREAT,
            0664, &mqAttrs);
    if (mqdes == (mqd_t)-1) {
        /* mq_open() failed */
        while (1);
    }
    /* Construct writer/reader Task threads */
    Task_Params_init(&taskParams);
    taskParams.stackSize = TASKSTACKSIZE;
    taskParams.stack     = &task1Stack;
    taskParams.priority  = 2;
    Task_construct(&task1Struct, (Task_FuncPtr)mainTask, &taskParams, (void *)&mqdes);
    taskParams.stack     = &task2Stack;
    taskParams.priority  = 1;
    Task_construct(&task2Struct, (Task_FuncPtr)task1Fxn, &taskParams, (void *)&mqdes);
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    mqAttrs.mq_maxmsg = MSG_NUM;
    mqAttrs.mq_msgsize = MSG_SIZE;
    mqAttrs.mq_flags = 0;
    mqdes = mq_open ("alarm", O_RDWR | O_CREAT,
            0664, &mqAttrs);
    if (mqdes == (mqd_t)-1) {
        /* mq_open() failed */
        while (1);
    }

    /* Construct writer/reader Task threads */
    Task_Params_init(&taskParams);
    taskParams.stackSize = TASKSTACKSIZE;
    taskParams.stack     = &task1Stack;
    taskParams.priority  = 2;
    Task_construct(&task1Struct, (Task_FuncPtr)mainTask, &taskParams, (void *)&mqdes);
    taskParams.stack     = &task2Stack;
    taskParams.priority  = 1;
    Task_construct(&task2Struct, (Task_FuncPtr)task1Fxn, &taskParams, (void *)&mqdes);

MainTask:

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mqd_t* mqdes = arg0;
int msg = 5;
mq_send(*mqdes , (char *)&msg, sizeof(msg), 0);
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

mqd_t* mqdes = arg0;
int msg = 5;

mq_send(*mqdes , (char *)&msg, sizeof(msg), 0);

task1Fxn:

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mqd_t      *mqdes = arg0;
int msg;
while (1)
{
    while (mq_receive(*mqdes, (char *)&msg, sizeof(msg), NULL) != -1) {
       GPIO_toggle(CONFIG_GPIO_LED_0);
    }
}
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

mqd_t      *mqdes = arg0;
int msg;

while (1)
{
    while (mq_receive(*mqdes, (char *)&msg, sizeof(msg), NULL) != -1) {
       GPIO_toggle(CONFIG_GPIO_LED_0);
    }
}

over 2 years ago

0 Sid over 2 years ago

TI__Mastermind 20407 points

Hi Alexis,

Can you put a breakpoint on mq_recieve(), and mq_send() then step over it. This way, you can check where the crash happens.

Regards,

Sid

0 Alexis LECOQ over 2 years ago in reply to Sid

Prodigy 10 points

It seems to be at the size check:

if (msg_len < (size_t)((msgQueue->attrs).mq_msgsize))

0 Alexis LECOQ over 2 years ago

Prodigy 10 points

Update: If send a msg and then call the receive function directly in the main (not the task) it's working.
So it seems that the problem is in passing the mqd_t struct to the tasks.

0 Sid over 2 years ago in reply to Alexis LECOQ

TI__Mastermind 20407 points

Hi Alexis,

Alexis LECOQ said:
if (msg_len < (size_t)((msgQueue->attrs).mq_msgsize))

What is the value of mqAttrs.mq_msgsize = MSG_SIZE; in your code?

Have you added the same define, the size_of(int)

 #define MSG_SIZE sizeof(int)

If it is stuck at the size check, please can you check what hte actual values passed to msg_len and mq_msgsize.

Regards,
Sid

0 Alexis LECOQ over 2 years ago in reply to Sid

Prodigy 10 points

Yes the MSG_SIZE is sizeof(int).

There is no value in it when I enter in mq_receive() in debug. Seems like the structure hasn't been correctly passed to the task/function.

0 Sid over 2 years ago in reply to Alexis LECOQ

TI__Mastermind 20407 points

Hi Alexis,

This is something I need to test, please expect an answer on Monday

Regards,
Sid

0 Sid over 2 years ago in reply to Sid

TI__Mastermind 20407 points

Hi Alexis,

I just followed the tutorial as is. I was able to make it work where the characters are echoed and when I type an "X", the led toggles as expected. Please make sure you have followed each step of the tutorial.

https://dev.ti.com/tirex/explore/node?node=A__ATOcjUy6zyynCMWH-Ys6Ng__com.ti.SIMPLELINK_ACADEMY_CC13XX_CC26XX_SDK__AfkT0vQ__LATEST&search=queues

Regards,

Sid

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LAUNCHXL-CC1352R1: Message queue not working.