Software I2C bus, output pins

Jeroen.Vandezande

Subject:

Software I2C bus, output pins

· Posted: 28.11.2011 - 11:41 · #1

Hi,

I have an application where I need 2 or more separate I2C busses...
Is it possible to change the clock and data pins of the software i2c bus at runtime?
The busses never need to run at the same time...

Best Regards,

Jeroen Vandezande

Merlin

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Subject:

Re: Software I2C bus, output pins

· Posted: 28.11.2011 - 13:15 · #2

Hi Jeroen. In the absence of a software solution there is always the hardware one. Parallel up the data lines and use an AND gate or similar on the clock lines to select the clock lines one at a time - a sort of slave select, using a free port pin as the other input to the AND gate.

Regards

Merlin.

Jeroen.Vandezande

Subject:

Re: Software I2C bus, output pins

· Posted: 28.11.2011 - 14:00 · #3

Thank you!
That is a great idea!

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