On Sat, 2016-04-02 at 12:34 +0200, Maxime Ripard wrote: > Hi, > > On Fri, Mar 25, 2016 at 08:04:07PM +0100, Michael Haas wrote: > > > > The A20 processor provides a third I2C bus on pins PB20 and PB21. > > The A20-OLinuXino-LIME2 exposes this bus via its GPIO1 port. > > > > Olimex also provide a breakout board called the > > A20-OLinuXino-LIME2-UEXT. This change is required to properly > > support I2C on the UEXT connector found there.
Documentation for Olimex UEXT interface: https://www.olimex.com/Products/Modules/UEXT/resources/UEXT_rev_B.pdf Basically it *should* by default work as a board to board connector which supports three serial communication interfaces: I2C, SPI and UART (original document mentions RS232, but official modules work only with 3.3V logic levels). > > > > Signed-off-by: Michael Haas <h...@computerlinguist.org> > What are the other options on that pin? Is it something exclusively > dedicated to i2c on the pin headers and the documentation, or is > anyone free to use that pin for whatever he wishes? > > Thanks, > Maxime > > -- > Maxime Ripard, Free Electrons > Embedded Linux, Kernel and Android engineering > http://free-electrons.com > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
