//// present = touch_present() Issues a reset and returns TRUE ////
//// if the touch device is there. ////
//// ////
//// data = touch_read_BYTE() Reads one BYTE from a touch device. ////
//// ////
//// ok = touch_write_BYTE(data) Writes one BYTE to a touch device ////
//// and returns TRUE if all went OK. ////
//// A FALSE indicates a collision with ////
//// another device. ////
////