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View Full Version : teensy 3 I2C speed test vs other MCUs



manitou
01-31-2013, 10:48 PM
Here are results for simple block read/write's to an I2C EEPROM for teensy 3.0 and various other MCUs at 100KHz and 400KHz. No surprises. Results in file I2Cperf.txt at

https://github.com/manitou48/DUEZoo

As Paul noted, to change from 100KHz to 400KHz on teensy, edit Wire.cpp, and you probably need to restart the IDE.

Headroom
02-16-2013, 08:07 AM
It would be interesting to see what the results woud be if you used a different I2C library for the Ardino compatible boards:

http://dsscircuits.com/articles/arduino-i2c-master-library.html

Tanks for posting this!