Touchpen Test

To test whether or not a touch pen works properly, you can draw a line on the LCD, check if there is any offset or vibration. This can be done via the “penpad” utility. Click on the “penpad” icon in the “FriendlyARM” tab.
The “penpad” utility is an easy to use program developed by FriendlyARM. Start it, a yellow drawing area will show up. Draw whatever you like in the area (the pen color is black, its width is 1 pixel), go to “File” -> “Save”, you will save what you draw to a png file(in the “Documents” tab, the /Documents/image/png/ directory). The file name begins with 001. The maximum number of files that can be saved is 999. The following screenshot shows that our writing was smooth which meant our pen was accurate.

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