A classic app note for resistive touch panels or screens is slaa384a.pdf from TI, titled "4-Wire and 8-Wire Resistive Touch-Screen Controller Using the MSP430", and one should be able to find it via a search.
The algorithm IIRC uses a pull-up only for initial press detection. Subsequent to that, ADC readings do not need any pulls, and multiple ADC readings is often used to confirm that the press is stable.
The algorithm IIRC uses a pull-up only for initial press detection. Subsequent to that, ADC readings do not need any pulls, and multiple ADC readings is often used to confirm that the press is stable.
Statistics: Posted by katak255 — Sat Aug 24, 2024 7:04 pm