I'm using the emWin interface, but a little confused about how to read an input and make something happen on the screen. Example: I have a list box and I want the select an option of that listbox using a couple I/O on the micro. Up, Down and select would be the input pins. When I press "Up" I want it to move the selction up.
Really my biggest probelm is where do I put the code to read the input.
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Take a look at chapter 24 of the emWin manual. Basically you just need to call GUI_StoreKeyMsg from your GPIO interrupt handler.