Deciding between Arduino UNO and Leonardo for interfacig an AFE with Serial.

Question

Hello,

I have used Arduino in previous projects quite successfully. However, on this occasion, I would like to know the best way to interface an Analogue Front End (AFE) with Arduino.

I want to have a LCD interface to a project which is meant to display internal register values of the AFE to the LCD. I want to use an Arduino to interface both of these.

The AFE is Cirrus Logic CS5490, which is an energy measurement IC. CS5490 has Tx/Rx interface to R/W internal registers.Must I wire the Tx/Rx of CS5490 with those of the Arduino (pin 0 and1 on UNO) or could they be connected to other Digital pins as well?

Should I use Arduino UNO (with one serial port) or Leonardo (2 UARTS). I have identified this as LCD shield on this website.

I will make a small PCB with CS5490.

Regards.

Robert Peter Oakes · Answer

your other choice culd be an Arduino MEGA, it has multiple serial ports and loads of RAM and FLASH

A work of warning though, this is a MAINS power monitor, If you are not familuar with working on mains voltages (LETHAL) then ensure your supervised by someone who is and well protected (Ground Fault Circuit Breakers, Isolation Transformer or other protection. or use low power for the experement / POC. also the chip is 3V3 supply, even a momentary wrong connection will fry the chip and anything else connected to it

it looks like an interesting chip, i look forward to seeing your resultant project

Peter

clem57 · Answer

If you use other digital pins, you will need to use software to assemble the bits whereas the 0,1 are hardware based interrupts. The Uno shares the serial port with USB, so I would go with the Leonardo to use a non-shared port.

Clem

Deciding between Arduino UNO and Leonardo for interfacig an AFE with Serial.

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