Getting Events and Buttons to Work in Platform IO - SC01 Plus Display

How to
1

I have been using the following template from github GitHub - fritsjan/WT32-SC01-PLUS-PLATFORMIO to create a Temperature Controller. I followed the example in the Squareline Tutorial to get me going. I created a ui folder in my lib platformio folder. All the ui files are exported to this folder from Squareline Studio.

I have a button event in ui_events.c This event is generated when the “button” is released.

void advanceButtonPressed(lv_event_t * e)
{
handleAdvancedButtonPressed();
}

It calls handleAdvanceButtonPressed in main.c

To compile correctly, I added the following line to ui_events.h

extern void handleAdvancedButtonPressed();

When I tap the “button”, the handleAdvancedButtonPressed() function sends out an mqtt message.

I had some stumbles getting to this point, but pass it on as I see others have been having a similar issue. It saves copy and pasting code around. I have not tried it in the Arduino IDE as I now prefer platformio.

Regards,

David

2

Beware, the extern entry in ui_events.h will be overwritten when you export the ui…

So remember to make a note and enter it again. The option not to export ui_events seems to only apply to ui_event.c, it will still export ui_events.h.

3

C basics
If you create func in c file declare it in h file. In other c files include h file.
main.c i use master.h and place here void handleAdvancedButtonPressed();
In uievent.c then include master.h

4

Yes, that is what I would expect. I have a definitions.h file that includes the functions declared in main.c. However, it did work when I put the definition in that and included it in ui_events.c. It could of been a paths thing in platform io as I have the ui in a seperate folder. Or something to do with platformio build system.

5

Why you place ui into lib/ui, normal is place export into src folder ahead main
Technicaly lib is folder for .a files

6

True, they are not really a library. It was just a convenient place to put them as I didn’t want them mixed with the files in the source folder. I could create a ui folder in src and may do that in the future. For now it is working fine for me.

7

Where you place definitions.h ? Right place is include folder
And read README file in lib folder maybe explain you why ui.a cant build…

8

definitions.h is in the include folder and it all builds fine for me. I don’t have any problems building now and I don’t have to do any moving files between folders.