I'm not sure which target you are using - but almost every Build Environment contains one example called 'DeviceIntegration'. This example demonstrates the basics of what you want to achieve: When you touch a button on the screen, the LED on the board is switched on and off. Or the other way: When you press a hardware button on the board, the UI shows a progress bar...
In a similar manar you can read your ADC in order to get a temperature value and display it.
Please have a look into the Embedded Wizard project of the example - there you will find a lot of description.
All the necessary background information is described in the articles 'Integrating with the device' and 'Device Class and Device Driver'.
I hope this helps.
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