I2C code for eeprom access

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David Peters Contact options for registered users 's Avatar (by Gravatar) posted on
December 7, 2004, 6:47 pm
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I'm looking for sample C code that explains how to access an eeprom on the
I2C bus.
I'm running 2.4.27-vrs1 on an AT91RM9200.
Thank you!



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tehnyitchin Contact options for registered users 's Avatar (by Gravatar) posted on
December 8, 2004, 9:14 pm
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Re: I2C code for eeprom access
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Hi David,

I have used eeprog to access the I2C EEPROM on the AT91RM9200DK dev
kit. eeprog lives at..
http://codesink.org/eeprog.html

good luck!
tehn yit chin


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David Peters Contact options for registered users 's Avatar (by Gravatar) posted on
December 9, 2004, 2:07 pm
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Re: I2C code for eeprom access
I've been trying to use this.  I'm having a strange problem with it.  If I
write "Hello, world!" to the eeprom, I get "H e l l o ,  w o r l d ! " when
I read it back.  It acts like it writes to every other address.  Any
thoughts?
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David Peters Contact options for registered users 's Avatar (by Gravatar) posted on
December 9, 2004, 2:58 pm
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Re: I2C code for eeprom access
I found my problem.  Works great now.

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Tauno Voipio Contact options for registered users 's Avatar (by Gravatar) posted on
December 9, 2004, 9:42 pm
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Re: I2C code for eeprom access
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 > I found my problem.  Works great now.
 >

Just for curiosity: Did you increment an auto-increment address pointer?

--

Tauno Voipio
tauno voipio (at) iki fi


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David Peters Contact options for registered users 's Avatar (by Gravatar) posted on
December 10, 2004, 2:51 pm
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Re: I2C code for eeprom access
Yes, that was the problem.

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