FreeRTOS hangs on xQueueSend

[LMorr.3]

My program hangs on xQueueSend call:

if (xQueueSend(msg_queueHandle, (void *)&msg, 10) != pdTRUE) {

When I step through the code, I see it reaches the xQueueGenericSend function but exits on the first line of that function where the following is called:

configASSERT( pxQueue );

Any ideas on why configASSERT would always exit the function?

[hs2]

Simply because the queue handle pxQueue is (still) NULL which usually means the queue wasn’t created before used. Hence the valuable assert catching this sort of programming error.

[LMorr.3]

When I pause the debugger with no break-points, the cursor ends up on configASSERT(pxQueue) line of the xQueueGenericSend function. The pxQueue is not null.

[hs2]

Then just step into the code to see why it's stuck there and/or check how you did #define the configASSERT macro (in your FreeRTOSConfig.h).

[LMorr.3]

I'm a bit further along.

The main issue I have now is I used CubeMX to configure a queue named msg_queueHandle and it is set in freertos.c. How do I get CubeMX to expose msg_queueHandle as global so that I can access it from my blink_led_task.c file? There is no freertos.h file created by CubeMX to include in blink_led_task.c.

[hs2]

Sorry - I don't use cube.

[Pavel A.]

> How do I get CubeMX to expose msg_queueHandle as global 

If Cube does not generate it as static, it is already exposed as global.

Otherwise add a small function in user area of main.c, like:

QueueHandle_t get_my_queue() { return msg_queueHandle; }

May this be your biggest problem 😉

[LMorr.3]

I tried setting CubeMX to generate the queue with both Dynamic and Static and still not showing as global scope. I'm confused as to why mx does not expose msg_queueHandle globally? I was hoping I could simply add the queue in MX and have it in the global scope.

I also tried the getter function you recommended and msg_queueHandle is still generating a compile error as undefined.

[LMorr.3]

Sovled! I was able to get my code working by adding the following to blink_led_task.h file which was calling msg_queueHandle:

extern osMessageQueueId_t msg_queueHandle;

If I place code in a file outside of main.c than I add the declaration.