Lab 3: Move Application into an RTOS

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Step 4: With MHC, Configure Harmony Core

1

Add a third application.

  • Select Harmony Core Service.
  • Set Number of Applications to 3.
  • Enter "app_usb" for the new Application Name.
lab3_step4_01.png
Figure 1: Add app_usb Application

2

Verify RTOS configuration of app_sensor task.

  • Expand and observe the RTOS Configuration in Application 0 Configuration.
  • The app_sensor task reads the temperature value and fills the queue of the app_sdcard task.
lab3_step4_02.png
Figure 2: Verify app_sensor RTOS Settings

3

Modify RTOS configuration of app_sdcard task.

  • Expand RTOS Configuration in Application 1 Configuration.
  • Tick the box Use Task Delay and set 50 ms of delay (default value).
  • The app_sdcard thread is blocked until the queue is filled by the app_sensor task.
  • Once unblocked, the app_sdcard will log the temperature value with a timestamp into the SD card memory.
  • Then, the task will wait for the queue to be filled with the next data.
lab3_step4_03.png
Figure 3: Configure Task Delay to app_sdcard RTOS Settings

4

Verify RTOS configuration of app_usb task.

  • Expand RTOS Configuration in Application 2 Configuration.
  • The app_usb thread is blocked until the queue is filled by the other task's thread (when another task requests to print some data over USB CDC Console).
  • Once unblocked, it will print the content of the queue on the serial port.
  • Then, the task will wait for the queue to be filled with the next data to print.
lab3_step4_04.png
Figure 4: Verify app_usb RTOS Settings


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