Search found 4 matches

by avsej 
Tue Jul 18, 2017 3:52 pm
Forum: General Discussion
Topic: Strange capture of I2C on logic analyzer
Replies: 8
Views: 12726

Re: Strange capture of I2C on logic analyzer

Okay. My problem has been solved :)

The test clips didn't give good connection. Once I connected without them, everything in capture became clear and without any glitches.

Thank you.
by avsej 
Tue Jul 18, 2017 2:47 pm
Forum: General Discussion
Topic: Strange capture of I2C on logic analyzer
Replies: 8
Views: 12726

Re: Strange capture of I2C on logic analyzer

Yes, same with devkitc, even when I connect it with jumper wires directly.
20170718_174505.jpg
20170718_174505.jpg (185.1 KiB) Viewed 12634 times
by avsej 
Tue Jul 18, 2017 7:46 am
Forum: General Discussion
Topic: Strange capture of I2C on logic analyzer
Replies: 8
Views: 12726

Re: Strange capture of I2C on logic analyzer

With 3v3 situation is not better.
Selection_126.png
Selection_126.png (25.01 KiB) Viewed 12689 times
Regarding pullup, I thought that configuring it in ESP should be enough, no?

Code: Select all

    conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
    conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
by avsej 
Mon Jul 17, 2017 9:06 am
Forum: General Discussion
Topic: Strange capture of I2C on logic analyzer
Replies: 8
Views: 12726

Strange capture of I2C on logic analyzer

Hi, During debugging code interacting with DS3231 over I2C I noticed that my Saleae analyzer cannot decode I2C signals. I've minimized example to the following (just send address) to make sure analyzer works: #include "freertos/FreeRTOS.h" #include "esp_system.h" #include "driver/gpio.h" #include "d...