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todor Newbie
todor
2 posts since
Feb 8, 2010
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Feb 8, 2010 5:33 AM

Is there working I2C library for h8 series

Hello,

I am using the h83678 controller, and I simply can't make the internal I2C module to work.I've searched almost everywhere but I can't find library that I can include in my IAR embedded workbench project.Does anyone have such library or a working code?

Tags: i2c, h83678
CRADLE Newbie
CRADLE
8 posts since
Jul 29, 2009
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Feb 8, 2010 7:13 AM in response to: todor
Re: Is there working I2C library for h8 series

http://eu.renesas.com/request?LANGUAGE_CD=EN&LAYER_ID=&SCREEN_ID=ViewUsrFrameApnDocumentSearch&FUNCTION_CD=I2C-bus&DOC_TYPE=Application%20Notes&FUNCTION_FLG=1&FUNC_OR_APP=F

 

http://eu.renesas.com/request

 

Are you looking here?

ckgrier Apprentice
ckgrier
840 posts since
Mar 16, 2009
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Feb 10, 2010 12:11 PM in response to: todor
Re: Is there working I2C library for h8 series

Since you use the IAR compiler, you'll need a library compiled with that tool.

 

However, the HW manual gives a very good description of the Master and Slave operations for Transmit and Receive. I2C can be picky with timing of transitions, so it you have access to a logic analyzer, it can help.

 

Look at the I2C Bus section of the manual, and make sure your code follows the flowcharts Make sure you know if you are using the Clocked Synchronous or the I2C Bus format.

todor Newbie
todor
2 posts since
Feb 8, 2010
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Feb 12, 2010 12:20 AM in response to: ckgrier
Re: Is there working I2C library for h8 series

I've made my own functions according to the manual, but they are not working very well.Sometimes I miss some bytes. I guess that is because I am using it to control Cypress - capsense chip to make touch-sense keyboard which has very strange timings .If someone with h83678 or similar microcontroller has working I2C functions please post it here so I can see where I am wrong.

raut_onkar Newbie
raut_onkar
1 posts since
Jun 18, 2010
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Jun 18, 2010 7:21 PM in response to: todor
Re: Is there working I2C library for h8 series

Hi,

 

I've made this piece of code put up on my website. Can work with most devices. It's pretty basic and is made with HEW. Haven't tested with IAR or other IDEs. Download freely from http://sites.google.com/site/rautonkar/projects. It's still under test, so send bug reports if any.

 

 

Regards,

 

Onkar Raut,

Graduate Student,

University of North Carolina at Charlotte.

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