[lcdproc] I2C bus (was XML...)

[Charles Steinkuehler]

> | There is a fairly standard way to hook a parallel port bus to an I2C bus
using
> | a single 74LS05 (open collector) chip.  I could look up the documentation
for
> | this if anyone needs it...
>
> Does this mean you would use i2c function calls, or twiddle bits on the
> parallel port to simulate the i2c activity?
>
> This could be the parallel port adapter I saw the driver for. If you can
> dig up the docs for this, that would be great

The Phillips circuit for a parallel port I2C interface, which is sort of the
'standard' for connecting an I2C bus to a PC (at least before the modern
chipsets which have I2C built-in to talk to the SDRAM config eeprom), is here:
http://216.35.77.145/acrobat/various/I2CPPP.pdf

Some other useful links:

The I2C specification
http://216.35.77.145/acrobat/various/I2CSPEC.pdf

The I2C specification V2.1
http://216.35.77.145/acrobat/various/I2C_BUS_SPECIFICATION_3.pdf

The I2C bus and how to use it (including specifications)
http://216.35.77.145/acrobat/various/I2CBUS.pdf

Programming the I2C interface (Embedded Systems Programming articles on I2C
and bit-banging serial busses)
http://216.35.77.145/acrobat/various/I2CINTER.pdf

I2C application notes
http://216.35.77.145/handbook/applicationnotes_49.html

Charles Steinkuehler
http://lrp.steinkuehler.net
http://c0wz.steinkuehler.net (lrp.c0wz.com mirror)



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