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No data decode for SPI protocol

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No data decode for SPI protocol

Postby 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 68 times
20130618-0007.psdata
(223.77 KiB) Downloaded 72 times
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Re: No data decode for SPI protocol

Postby 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

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Re: No data decode for SPI protocol

Postby 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 70 times
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Re: No data decode for SPI protocol

Postby 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

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