RE: STM32H7B3I - TouchGFX Application Framework: Model, View, Presentation, Message Queue

Jan Cumps — Thu, 13 Aug 2020 13:52:45 GMT

Simulator info:

The TouchGFX Designer has a simulator. It's an essential part of the design flow.

When you've built a part of the GUI, you can simulate the look-and-feel on your PC.

To do that, the simulator actually compiles your TouchGFX code and then executes it. It's more than just simulating - it's e real run but on a virtual display.

Now, when you add calls to the backend systems, things may become more complex. Because the TouchGFX designer doesn't have the knowledge of all dependencies you need in your project.

They have provided a solution that's as elegant and simple as you can get: a define.

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:3ef06e6b-9b7d-4651-b12d-db8be7f5e991:type=c_cpp&text=%23ifndef+SIMULATOR%0A....%0A%23endif]

If you place all logic that's outside the graphical biosphere, but that's natural part of the model, view or presentation logic, between these defines, the simulator will compile and run just fine.

How impacting this is actually depends on how well you adhere to the Model - View - Presenter pattern. If you do it right, you only need this in your model.

In my case that was the case:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:3ef06e6b-9b7d-4651-b12d-db8be7f5e991:type=c_cpp&text=%23include+%3Cgui%2Fmodel%2FModel.hpp%3E%0A%23include+%3Cgui%2Fmodel%2FModelListener.hpp%3E%0A%0A%23ifndef+SIMULATOR%0A%23include+%22FreeRTOS.h%22%0A%23include+%22queue.h%22%0A%23include+%22scpi_msg.h%22%0A%23include+%22ScpiMgr.h%22%0Aextern+%22C%22%0A%7B%0AxQueueHandle+gui_msg_q%3B%0A%7D%0A%0A%23endif%0A%0AModel%3A%3AModel%28%29+%3A+modelListener%280%29%0A%7B%0A%23ifndef+SIMULATOR%0A++++gui_msg_q+%3D+xQueueGenericCreate%281%2C+1%2C+0%29%3B%0A%23endif%0A%7D%0A%0Avoid+Model%3A%3Atick%28%29%0A%7B%0A%23ifndef+SIMULATOR%0A++++%2F%2F+Check+for+messages+from+backend%2C+with+zero+timeout%0A++++uint8_t+msg+%3D+0%3B%0A++++if+%28xQueueReceive%28gui_msg_q%2C+%26msg%2C+0%29+%3D%3D+pdTRUE%29%0A++++%7B%0A++++++++if+%28msg+%3D%3D+SCPI_IDN%29%0A++++++++%7B%0A++++++++++++%2F%2F+Notify+current+presenter+that+IDN+is+received%2Cand+hand+over+payload%0A++++++++++++modelListener-%3Escpi_idn%28%28const+char*%29ScpiMgr%3A%3AgetReply%28%29%29%3B%0A++++++++%7D%0A++++%7D%0A%23endif%0A%7D%0A%0Avoid+Model%3A%3Arequest_scpi_idn%28%29+%7B%0A%23ifndef+SIMULATOR%0A++ScpiMgr%3A%3Aidn%28%29%3B%0A%23endif%0A%7D]

RE: STM32H7B3I - TouchGFX Application Framework: Model, View, Presentation, Message Queue

balearicdynamics — Mon, 10 Aug 2020 18:04:24 GMT

Nice update.

Enrico

RE: STM32H7B3I - TouchGFX Application Framework: Model, View, Presentation, Message Queue

DAB — Mon, 10 Aug 2020 17:59:57 GMT

Nice update Jan.

DAB

RE: STM32H7B3I - TouchGFX Application Framework: Model, View, Presentation, Message Queue

Jan Cumps — Mon, 10 Aug 2020 13:14:40 GMT

The SCPI ID for the load mentiones The Breadboard. That's a tribute to our [mention:6e474abc33b64a82aa78c9813503c962:e9ed411860ed4f2ba0265705b8793d05] , the father of the electronic load:

[View:https://www.youtube.com/watch?v=7M7NAFHZacE:740:466]

If you reached this blog series while searching for STMicro TouchGFX tips and tricks: go view the video above to check out the genesis of hardware that's being controlled.

RE: STM32H7B3I - TouchGFX Application Framework: Model, View, Presentation, Message Queue

balearicdynamics — Mon, 10 Aug 2020 11:44:19 GMT

Because this class is full static ([mention:2136c4649d3b47f78653b7e97ac61f69:e9ed411860ed4f2ba0265705b8793d05], I use this instead of a Singleton)

Well done mate!

Enrico