spi flowkit

[DAVIDJOINER]

Hi

I am using my flow kit 2 to analyse some SPI signals using megga 2560

I have set the slowest clock speed i can currently select on the megga 2560 ie /64

But currently do miss a few clock pulses even if i set the clock speed to the FOSC /64 on the megga

Is there any way i can reduce the SPI clock speed still further initially for my tests to allow me to continue utilise the flow kit 2

Note i can monitor the actual clock pulses and they are fine using an external logic analyser ie non missed

Best Regards
David

[BenR]

Hi David,

Options might be to move to a software SPI channel or to change the crystal on the arduino.

I personally use something like this and for the price it does very well.
https://www.amazon.co.uk/Youmile-Analyz ... C95&sr=8-9

[DAVIDJOINER]

Hi Ben

Don’t want to change crystal as potential problems likely with booth loader and other things

May try an 8 meg 3.3v arduino

But really wanted a small mod to the software SPI clock freq


Already use the analyser you mention and that’s fine for just monitoring the lines

David