I’ve been doing a lot of debugging of SPI Flash while working on the upcoming iMX RT 1011 Metro. These microcontrollers are somewhat unique among those we support because it stores the code to execute on external flash. (ESP32S2 does this too.) We were having trouble getting it working, so I broke out my Saleae Logic Pro 16 to monitor the SPI Flash. That way I can see both what code the microcontroller is loading and the CIRCUITPY transactions that CircuitPython does.
Saleae has a new alpha version of software they are calling Logic 2. It’s very easy to use and it was also easy to extend. I’ve created a “High Level Analyzer” that takes the lower level SPI data and interprets it into the common flash commands. The source for the extension is here: https://github.com/adafruit/Logic2-SPIFlash There is a Saleae forum thread about it here.
To install in Logic 2, click extensions on the right hand side. Under the three dot, more menu, click “Check for Updates” then install the “SPI Flash” extension.
Click the analyzers tab.
Add a SPI analyzer and configure it for your capture.
Add a SPI Flash analyzer.
Set the SPI analyzer as the Input Analyzer.
Min Address, Max Address and Decode Level are optional.
Change Address Bytes to match
Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.