I need firmware written and my electronics checked. I am trying to send data from 40 analog capacititve sensors to my computer via USB. My current design involves using a multiplexer (PCA9547) to mux 5 I2C CDCs (AD7143), each of which has 8 of the sensors attached. The AD7143 does not have a unique device address, so they must be multiplexed.
All that I need is firmware on my 18F2455 (currently in a UBW USB BitWhacker) that will read in the data and send out a data stream at 115k baud that can be easily used by the computer. Details on the UBW can be found here : [url removed, login to view] [url removed, login to view] I am open to moving to a different PIC if it seems best.
There will also be hardware involved. I will send what I have and other components required will be shipped to you.
Electronics redesign is an open topic. If you have good input for this or a better way of doing it, new job prices will be negotiated. I'm pretty sure my current circuit needs some fixes, but a complete overhaul is not out of the question.