For this week, my goals were to make the schematic diagram for the system as well as to do research on how the fingerprint scanner will interface with the PIC. I’ve completed the schematic which is included below. This involved looking up how each device will communicate with the PIC and detailing what pins would be used for each device. It has been arranged so that the SD card reader and the Ethernet Module are on one SPI channel, and the LCD and the DAC are on the second SPI channel. The fingerprint scanner will communication via UART connection. In addition, I’ve found a library for the fingerprint scanner on Github.com which is in C++. I also soldered wires to the SD card reader so that it could be plugged into the breadboard and taught Phil how to solder while doing so. For next week, I will be working on converting this library to C and setting up the fingerprint scanner.
Awesome job, Joe! Absolutely stupendous schematic.