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Published 20 hours ago • verified publisher icon EspoTek

logic analyzer - I2C decoder

Open abondis opened this issue 1 year ago • 7 comments

I'm having an issue with the logic analyzer in I2C mode it seems that I'm able to see the WRITE commands in the serial decoding window, but for some reason it gets cleared very fast. Is there a way to:

  1. keep everything in this decoding window?
  2. freeze, for example capture X seconds and freeze then analyze later?

abondis avatar Feb 28 '23 04:02 abondis

Hi mate. As far as I'm aware, the serial decoding screen should literally never clear, unless you're sending a whole lot of newlines.

Is it formatted as hex or ASCII?

EspoTek avatar Mar 01 '23 23:03 EspoTek

Almost a year old, but I am having trouble with the i2c analyzer. I have a esp outputting to an oled and every once in a while I can see the WRITE: followed by a handful 0x00. But it is only 1 or 2 lines of that, then nothing else. Has anyone got i2c to decode successfully?

tonyn79 avatar Jan 29 '24 17:01 tonyn79

What frequency is it running at? 100k should be fine, 1MHz won't work.

EspoTek avatar Jan 31 '24 06:01 EspoTek

I have tried at 100 and 400. I can see the wave forms in logic analyzer but no dice so far on serial output. I confirmed with another usb analyzer and it is outputting the packets. My use of the ESPOTEK is logic analyzer inputs (1 and 2) going to sda, scl. Both LA turned on with serial decoding. Every once in a while I see WRITE: with a number of 0x00, but thing consistent coming through. Any ideas to what I may be doing wrong?

tonyn79 avatar Jan 31 '24 19:01 tonyn79

This might sound silly, but have you tried swapping the SDA and SCL inputs around? If not, there might be some sort of odd regression in the software.

EspoTek avatar Jan 31 '24 23:01 EspoTek