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AD�?b
AD�?b
Senior
Jan 28, 2020 5:52 PM UTC
Solved

STM32F746G-DISCO, FreeRTOS, TouchFGX

If I call the function with the button from the STM32F746G-DISCO screen, e.g. a counter, do I have to use FreeRTOS to display the value of the counter on the screen?

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Martin KJELDSEN
Martin KJELDSENBest answer
Principal III
Jan 31, 2020 10:23 AM UTC

In that case just follow the instructions in the pinned post in this forum, there's information on that. Generally:

1) Fetch the value from your other RTOS task inside Model::tick()

2) implement a function in the modelListener interface to handle this value (temperatureUpdated(uint8_t _temp))

3) Notify active presenter of this new value: modelListener->temperatureUpdated(val)

4) Implement that function in your presenter.

5) Call something on the view to update the temperature, maybe text area.

/Martin

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Martin KJELDSEN
Martin KJELDSEN
Principal III
Jan 29, 2020 1:41 PM UTC

You do not have to use an RTOS. I'm not 100% sure what you mean by "if i call the function with the button".

Generally: The Model class (Model.cpp) is the heart of a TouchGFX application. This is where you will interface with e.g. OS message queues to get values from other tasks, or you could simply sample a GPIO port directly inside Model::tick() if you wanted. A Model knows about a ModelListener (as modelListener). Use this interface to propagate values to your active screen.

modelListener->temperatureUpdated(temp);

Please see the pinned post/sticky on integrating hardware with your UI.

If you're generating this value yourself you can also simply use the same interface

/Martin

AD�?b
AD�?bAuthor
Senior
Jan 29, 2020 3:34 PM UTC

Hi Martin

Thank you.

There is a button on the STM32F746-DISCO desktop. It calls the pulse counting function. I want to display the number of pulses.

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