User`s manual

High Performance Low Cost Embedded Systems
Turning the W1 adjustable resistor, you will see the conversion changes. It has 10 digit precision,
therefore the minimum value is close to 0 and the maximum value is close to 1024.
When you click on the touch screen, the A/D converter will take the touch screen as the channel,
you will see the result “-1”; when you move your touch pen away from the screen, the A/D converter
will take AIN0 as the channel again.
Note: the W1 adjustable resistor is hidden under the LCD, to test it, you might need to remove the
LCD
3.1.23 Testing User Buttons
Note: the user buttons don’t have special functions, they are just for testing low level drivers.
Click on the “Buttons” icon in the “FriendlyARM” subgroup:
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