How does the touchscreen use the USB? That is, how can I know when and where the screen has been touched? The USB must have a protocol of some kind (HID or serial) but someone would need to know that to be able to write a program for it.

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How does the touchscreen use the USB?  That is, how can I know when and where the screen has been touched?  The USB must have a protocol of some kind (HID or serial) but someone would need to know that to be able to write a program for it.

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