SPI Wrong data

Post discussions on applications you are writing
Post Reply
Sairam bhatraju
Newbie
Posts: 1
Joined: Mon May 20, 2019 8:50 am

SPI Wrong data

Post by Sairam bhatraju » Mon May 20, 2019 12:22 pm

Hi,
I am very new to Picoscope and Finding errors with SPI Monitoring.
I am transferring Data from CAN Module which having SPI interface(MCP 2515)...

I tapped the CLOCK,MISO,MOSI and CS with external probes.i am getting some wrong data.
Attachments
spi.PNG

bennog
Advanced User
Advanced User
Posts: 59
Joined: Mon Nov 26, 2012 9:16 am
Location: Netherlands

Re: SPI Wrong data

Post by bennog » Tue May 21, 2019 6:08 am

did you connect the ground clips from the probes to th -5V / GND.

Benno

Sairam bhatraju
Newbie
Posts: 1
Joined: Mon May 20, 2019 8:50 am

Re: SPI Wrong data

Post by Sairam bhatraju » Tue May 21, 2019 11:25 am

Connections: Probe A conencted to Data and Ground and Probe B Connected to clock and ground.
Attachments
ssss.PNG

Martyn
Site Admin
Site Admin
Posts: 3714
Joined: Fri Jun 10, 2011 8:15 am
Location: St. Neots

Re: SPI Wrong data

Post by Martyn » Wed May 22, 2019 6:00 am

Are you sure that you are measuring the correct signals, they are very low level ?

Please post a picture of your setup, and the psdata file you have captured.
Martyn
Technical Support Manager

bennog
Advanced User
Advanced User
Posts: 59
Joined: Mon Nov 26, 2012 9:16 am
Location: Netherlands

Re: SPI Wrong data

Post by bennog » Wed May 22, 2019 8:09 am

And if possible post a photo how you connected your probes to the SPI bus.

Post Reply