ThreadX Queue Usage in WICED Studio – KBA223311

Version: **

 

Question:

In WICED® Studio, how is the Queue Buffer updated when a queue message is pushed into a queue?

 

Answer:

The Queue Buffer runs in a circular fashion, based on the FIFO rule.

Figure 1 illustrates the ThreadX queue workflow:

  • The main thread initializes the queue.
  • A sub-thread is created in the main thread.
  • INT occurs once the registered key is pushed, INT is triggered, and value is pushed into queue. 
  • After the queue value is pushed the sub-thread wakes up, and execute the user application.
  • The user application is added to the sub-thread, which uses the message transferred from the INT.

Figure 1

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Figure 2 illustrates the queue methodology:

  • The Queue Size is 4 with each queue member having a size of 4 bytes.
  • Figure 2

Figure 2

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For detailed information on Threadx, see the ThreadX user guide in the WICED Studio installation directory. For example, if WICED Studio 6.1 is installed, the directory path is WICED-Studio-6.1/43xxx_Wi-Fi/WICED/RTOS/ThreadX/ver5.8/docs/ThreadX_User_Guide.pdf.