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 9 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 9 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 9 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 9 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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