Again, just soldered some wires to the SPI vias and other relevant signals and away we go: The challenge here was properly conditioning a state machine based on the NFC chip generating interrupts as it went in and out of sleep mode. The second project was much more challenging and involved an NFC front end communicating over SPI.
I was able to view the UART exchanges within a few minutes of setting up and using the ICD3, I modified and debugged the firmware with ease. You can see my setup below, where I just soldered some wire wrap lengths to various vias throughout the PCB: The firmware needed some modifications to make sure that data was properly coordinated with the module going in and out of sleep mode. I found two real world applications for the Saleae Logic 16 within a few weeks of buying it – and it paid for itself in time the first day that I used it (possibly making the projects a success overall.) The first was a prototype piece of hardware that used a Bluetooth LE module talking over UART to a PIC Microcontroller. No need to scroll through seconds of waveform data – just open the Excel sheet and start searching for characters and sequences of data. This is key when you’re trying to debug complex and/or long exchanges of data. The options are fantastic supported different standards, bauds, endianness, ascii, hex, etc. By assigning your channels to these analyzers, the actual data will be overlaid on your waveforms. On the right side of the screen, you can see the different “protocol analyzers”. Once all of the samples are collected, you’re waveforms appear on screen and you can scroll / zoom to your heart’s desire. You’ll see the trigger capture and the sample buffer start to fill up. Fire up your UUT, or initiate whatever action you’re trying to analyzer / debug in hardware.The software will begin collecting samples and looking for the trigger. The sample rate trades off with number of channels, so for the fastest rates you’ll be limited to fewer channels (again, not really a problem for anything I’ve tried.) Choose how many samples to collect (this thing can collect a TON of samples, more than i’ve needed for sure) and a sample rate.Choose a channel to trigger on (rising edge, falling edge, etc.) Each test lead is color coded and matches what you see on the screen. Interface was also quite intuitive and I have yet to read a manual or open the help menu. Very clean, does exactly what you’d expect. A screen shot from their website is shown below: The software is free to download (and test drive before you buy).
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