I have a Uno (PID:50) and 2.8 inch TFT Touch Shield with resistive touch. Running the example TouchTest I get a message "STMPE not found". I have tried using option 1 and 2 in the test and have tried a number of values for "STMPE_CS" in option 2.
This is an unmodified 2.8 inch display shield board plugged directly into the Uno. No wires, no changes. Should it work that way? Are there settings/coded changes needed?