Due - SPI

Projects Networking, Protocols, and Devices
1

hey guys

I'm having weird issues getting SPI to work on my due.
I've tried all 3 possibles choices for the Slave select pin, and every time I get the same issue.

I was having trouble getting a response from my SPI device, so I took it out and only connected SS (CS), CLK and MOSI to the oscilloscope/decoder, (all pins are floating, no connection to the SPI device).

It looks like I am getting a weird "leak" from the CLK pin into both SS and MOSI. (really obvious on MOSI).

has anyone ever seen anything like this? I have another Due lying around so I'll give it a shot. No need to say that the decoding is obviously incorrect due to the leaking into MOSI and SS(CS).

I've attached a screenshot.

thanks

SCR02.PNG
SCR02.PNG1280×824 33.1 KB

2

No problems with a DUE and SPI here, it works just fine with SPI LoRa devices, SPI TFT displays and SPI microSD cards.

3

not questioning the Due is capable of handling SPI work, just wondered why I am seeing these leaks on the CS line.

it could be that all pins are floating, with no device connected to them

4

zytra:
not questioning the Due is capable of handling SPI work, just wondered why I am seeing these leaks on the CS

So the DUE is fine with SPI ?

So why did you say;

I'm having weird issues getting SPI to work on my due.