TTP229 Capacitive-Sensitive Keyboard?
Has anyone had success connecting a TTP229 capacitive-touch 4x4 keyboard to a Prop-1 chip? I have the TTP229 data sheet and have tried all clocking arrangements for the serial I/O with the chip, but never get any data. I have a logic analyzer that shows no data during the 16 pulses from the Prop-1. The TTP229 board might be useful in a middle-school class, but not unless I can get some software to work. Any help greatly appreciated. Thanks. --Jon