I2C Decode Example
 With GradientOne you can decode serial bus signals. We've set up an example customer instance that gives you the ability to take it for a test drive and see for yourself. You can reach this demo by going to the home page: www.gradientone.com, and then clicking on the image underneath "Acquire An I2C Signal". It will take you here. In this setup, the RIGOL DS1054Z oscilloscope is connected to a demo board (see above), with Channel 1 to an I2C clock, and Channel 2 to I2C data (Channel 3 is connected to a UART signal). If you click "Get Data" you will initiate the GradientOne feature set that configures the RIGOL oscilloscope to capture the I2C waveform, screenshot, and instrument settings/metadata. Then you can click 'Decode', 'I2C', then 'Run Decode' to get the decoded waveform. The initial capture will look like this:  GradientOne also offers the ability to zoom in for close inspection of the waveform. Below you see the zoom, as well as the tool-tip feature that will easily tell you the X-Y values of time = 2.47 msec and voltage = 3.38 volts.  You can also upload a CSV file of an I2C waveform and decode that as well. The first thing you need to do is capture the waveform and upload it to GradientOne. There are two ways to do this:
Next, select the type of decode you want to do and configure it. GradientOne currently offers decode for I2C (7 or 10 bit addressing) and UART. The waveform is then decoded, the plot annotated, and a decode table presented to the user. Multi-Byte Search Once the signal is decoded a full range of search capabilities is available to you. Perhaps you wanted to find 'Start', 'Stop', 'Nack/missing acknowledge' bits, you could enter those text and find it on the signal. That is relatively trivial. You can also search for multiple byte patterns. If you had a decoded signal and wanted to look for a specific pattern that is unique to your data stream, you can construct that search term and GradientOne would identify that byte sequence in your signal. E.g. If want to look for 0x474F as a search term, it finds all cases where 0x47 then 0x4F occurred chronologically/sequentially.  Demonstration Video For Waveform Upload and DecodeIf you are interested in learning more, check out our white papers on Protocol Decode and Instrument Automation. Start decoding your signals using the web today with a free trial of GradientOne.
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