Author Topic: $15 quick 16 channel 20Mhz Logic Analyzer (STM32F4Discovery)  (Read 6579 times)

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Offline SolarSunrise

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$15 quick 16 channel 20Mhz Logic Analyzer (STM32F4Discovery)
« on: January 11, 2014, 08:30:03 pm »
On a Saturday morning, I was struggling on establishing an SPI communication between my STM32F4 and an ADC chip. I did not have my logic analyzer nor my oscilloscope with me, so I thought I was screwed. But after researching on the internet, I found that an STM32F4Discovery board could be turned a 16 channel 20Mhz Logic Analyzer! Brilliant!

All I had to do was flash the board with a bin file from a website. Here's the website where I got the files & the directions:
 - https://code.google.com/p/logicdiscovery/ <= Go to the download page for the download
 - http://habrahabr.ru/post/165853/ <= The page is in Russian, unless you can read Russian, Google Translate!
Note: Thanks to the user who made this awesomeness! All thanks goes to him/her

This program interfaces with a program called open logic sniffer. It is a fully featured logic analyzer program (operating on the SUMP protocol) and is open source, available on Win, OS X, and Linux(yay!)
Here's the download link: http://www.lxtreme.nl/ols/#Download/
(By the way, the link is also in the guide above.)

This literally saved my a$$ from hours of trouble shooting. Also, if you do not have a logic analyzer and are on a tight budget, I think this could be a solution. STM32F4Disc is only 15 bucks on digikey, so it can be a cheap, powerful alternative. Once you get a proper logic analyzer, use it as a development board, like it was suppose to be :)

Here's the spec given on the author's Google project page:
Quote
Features
    Sampling rate up to 20MHz
    16 channels
    up to 24k samples
    Edge sensitive triggers
    RLE encoding of samples for longer runs
    USB and UART interfaces for connecting to host
    SUMP-compatible protocol

Limitations
Comapred to original SUMP device and it's clones
    Maximum sampling rate is 20MHz instead of 200MHz
    No noise filtering
    RLE only up to 5MHz
    Channel groups can be only first or first+second
    Triggers are edge sensitive, matching by value is not supported
 

Offline han

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Re: $15 quick 16 channel 20Mhz Logic Analyzer (STM32F4Discovery)
« Reply #1 on: January 12, 2014, 10:57:32 am »
great,

 i will try it..
 


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