[Urgent Help] I'm lost... What "memory address" am I accessing on the XPT2046 to read coordinates? (My professor's question stumped me)

[jerry9911]

@6v6gt

That is more or less how I understand it works.
There is an internal shift register (it looks like 16 bits) into which your 8 bit commands land and the 12 bit results from the ADC land.
In 16 cycles, your 8 bit command is sent together with 8 dummy bits and the result that is returned is 12 bits from the previous ADC result and 4 dummy bits.

You have to then convert these returned voltages to coordinates and pen pressure.

very thank you for your advice!!