In this version of the new puck, the FSR circuit has switch logic that can be controlled either by a digital potentiometer (that will be controlled by software on the mote), or manually by a trim pot. For now, we are bypassing the digital potentiometer (using the jumper, connecting pins 1 and 2). In the future, we will utilize the digital potentiometer which interfaces to the digital I/O pins on the mote. We have decided that the following interface will be used:
- Analog input (from FSR battery readout) connected to ADC0
- INC from digital pot connected to GIO0
- U/D from digital pot connected to GIO1
- CS from digital pot connected to GIO2
- Vout from FSR circuit connected to UserInt
- Vcc from FSR circuit connected to AVcc