No data decode for SPI protocol

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b.buettner
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Joined: Tue Jun 18, 2013 1:32 pm

No data decode for SPI protocol

Post by b.buettner » Tue Jun 18, 2013 2:00 pm

I'm trying to analyze a spi stream.
Using PicoScope 3206MSO with Software PicoScope 6 Version 6.7.27.5 on Windows 7 32 Bit.
Data size is 8 Bit, clock rising edge, CS activ low. Digital Inputs D0-D3 used.
I attached the psdata and the pssettings files.
The clock signal is not continuous, the SPI master makes a pause every 4 clocks.
The software tries to decode every four clocks and thus decodes unknown packages.
The SPI protocoll doesn't have a fixed baudrate, so a clock like this is allowed.
The picoScope software should simply count the rising edges of the spi-clocks and decode a packet with 8 (or 16 or 32) edges, and show the result as hex or binary.
The user manual says something about START, STOP, ADDRESS packets to decode. In the SPI protocol no packets like this are defined. SPI protocol only transfers serial bit-streams, any definitions like Address are on device level.
PicoScope could only decode these if there was a free programmable table for the definitions.
So the question is, how can I force PicoScope to show me 8bit packages as I told him.

Bernd
Attachments
20130618-0008.pssettings
(4.08 KiB) Downloaded 186 times
20130618-0007.psdata
(223.77 KiB) Downloaded 179 times

Hitesh
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Joined: Tue May 31, 2011 3:43 pm
Location: St. Neots, Cambridgeshire

Re: No data decode for SPI protocol

Post by Hitesh » Tue Jun 18, 2013 3:59 pm

Hi,

There have been some serial decoding bugs fixed in PicoScope 6.7.28 (RC) - please download this from:

http://www.picotech.com/software.html

Please let us know if you still encounter issues.

I hope this helps.
Hitesh

Technical Support Engineer

b.buettner
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Joined: Tue Jun 18, 2013 1:32 pm

Re: No data decode for SPI protocol

Post by b.buettner » Wed Jun 19, 2013 7:21 am

Hi,
I installed the new version.
There is no change in behaviour.
I added a new psdata file.
Bernd
Attachments
20130619-0001.psdata
(116.05 KiB) Downloaded 181 times

Hitesh
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Joined: Tue May 31, 2011 3:43 pm
Location: St. Neots, Cambridgeshire

Re: No data decode for SPI protocol

Post by Hitesh » Thu Jun 20, 2013 1:38 pm

Hi Bernd,

I've submitted a bug report for this and will provide an update once a response is received.

Thanks,
Hitesh

Technical Support Engineer

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