[U-Boot-Users] i2c compiling and/or linking problem
wd at denx.de
Thu Feb 10 18:05:24 CET 2005
In message <420B8EFE.7010301 at web.de> you wrote:
> Well, I wanted to compile u-boot with i2c support.
For which board? Which architecture?
> So I just added an #include <i2c.h> in to my boards board.c, put #define
Why would you need this?
> CFG_HARD_I2C in the include-file and thought that'd be enough.
Why do you want to use CFG_HARD_I2C? Soft-I2C is much easier.
> Well... apparently that's not enough as compiling (make distclean done
> before) stops in the linking process with a lot of complaints like this:
> undefined reference to `i2c_read'
Maybe there is no hardware I2C implementation for your processor?
> So... any suggestions where to add some references so it find all the
> stuff? I tried to figure out what other boards that use i2c do, but
> couldn't find any hints that I missed some Makefile or config, got lost
> in the build-system.
You only have to compare the board config files. No other changes are
needed. Again, I recommend to use soft-i2c instead. There is zero
advantages with hard-i2c, just a lot of trouble.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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