Next Road Block

13 May 2015

I've identified an other road block:

The RGB LED Lighting Shield uses 10-bit I2C addresses! I found a good explanation here. Should not be a big problem but standard tools as i2cdetect only work with 7-bit addresses. Let's how it works.

crjeder over 10 years ago in reply to clem57

The problem is that not all tools (eg i2cdetect) do work with 10 bit addresses. I have to check if node.is i2c library does support this. If not I have to implement my self which will cost time. Technically it is not a big deal.
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Workshopshed over 10 years ago

Looking at the code for i2cdetect it only does 7 bit addresses. It should be possible to tweek that for 10 bit addresses.
http://www.lm-sensors.org/browser/i2c-tools/trunk/tools/i2cdetect.c

Alternatively you could look at the code libraries created for the Arduino and swap in the relavent low level commands.
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shabaz over 10 years ago

Hi!
You can split it up so that part of the address is sent as the first data byte. Basically, it still all obeys the I2C standard.
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clem57 over 10 years ago

Why a problem? If you see 111110xx or F8 or higher, you probably have a 10 bit address. All 7 bit addresses are in the rang up to F7.
Clem
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