CubeMX Custom Queue Sizes in FreeRTOS

[eweststrate]

I am having trouble creating custom queue sizes and making them work with the Heap Usage tool within CubeMX.  But I found a workaround until the bug gets fixed.

I created a queue using a custom item size (the message_data_t type is defined in my code):

The code generation is correct:

  /* Create the queue(s) */
  /* creation of UsbRxQueue */
  UsbRxQueueHandle = osMessageQueueNew (16, sizeof(message_data_t), &UsbRxQueue_attributes);

  /* creation of BufferQueue */
  BufferQueueHandle = osMessageQueueNew (8, sizeof(message_data_t), &BufferQueue_attributes);

  /* creation of SystemQueue */
  SystemQueueHandle = osMessageQueueNew (16, sizeof(message_data_t), &SystemQueue_attributes);

When the Heap Usage tool calculates the memory the queue needs, it incorrectly uses 4 bytes by default the heap size is wrong.

My solution is to create a user constant to tell the GUI what size it is:

.. then I #undef the message_data_t it creates so the code compiles correctly!

/* Private defines -----------------------------------------------------------*/
#define GAIN_COMP1 0
#define GAIN_COMP2 0
#define message_data_t 8
#define USART2_TX_Pin GPIO_PIN_2
#define USART2_TX_GPIO_Port GPIOA
....

/* USER CODE BEGIN Private defines */

// CubeMX bugfix:
#undef message_data_t

I think it works, but will post any updates.

STM32CubeMX - STM32 Device Configuration Tool

Version: 6.12.1-RC4

Build: 20240912-2256 (UTC)

[eweststrate]

I made some other changes to the code, and after a while, CubeMX started generating the code incorrectly.  I had to manually type in the "sizeof(" here. This errored out:

 /* Create the queue(s) */
  /* creation of UsbRxQueue */
  UsbRxQueueHandle = osMessageQueueNew (16, message_data_t, &UsbRxQueue_attributes);

  /* creation of BufferQueue */
  BufferQueueHandle = osMessageQueueNew (8, message_data_t, &BufferQueue_attributes);

  /* creation of SystemQueue */
  SystemQueueHandle = osMessageQueueNew (16, message_data_t, &SystemQueue_attributes);

 As far as I can tell I didn't change anything relating to this in the .ioc file.

[Ramboooka]

using "sizeof(message_data_t)" is no longer needed !!!

In STMCubeIDE V1.18.1 you can just type the length you need    eg: 64

then code code generator makes

Queue_DataHandle = osMessageQueueNew (8, 64, &Queue_Data_attributes);