I2C support in CrossWorks?

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Paul Robert Gaastra

• September 14, 2009 01:24

Hi,

I have just installed the evaluation version of CrossWorks for ARM.  I can't see anything about I2C in the libaries etc.  Does CrossWorks have I2C libraries and

I have been using Eclipse and the GNU ARM stuff and the best example I could find of I2C using interrupts I could find was by Keil.  I am not very good at  programming and I was having trouble converting the Keil code to work with GNU.  I thought if I bought CrossWorks it might save me some grief.

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  Brian Myers

  • September 14, 2009 01:47

  Using interrupts is probably the way to go, but in that case, a library isn't really what you need - you need to write the I2C ISR.

  I found that my  User Manual (UM10120 - I'm using the LPC 2136) has a good section on the I2C peripheral, and info about how to code up the ISR.

   

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  Paul Robert Gaastra

  • September 14, 2009 02:40

  My LPC2103 user manual has lots of stuff too but using something that's already written seems a lot easier to me. 

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  Kevin Townsend

  • September 27, 2009 23:13

  It will still involve some work yourself, but the LPC2148 demo code from J.C. Wren is based on GCC code and has a nice ISR driven I2C code (and everything else imaginable).  Given that the code uses FreeRTOS and I believe the I2C code uses FreeRTOS's message queues you'll have to remove that part, but it's probably the best starting point.  http://www.jcwren.com/arm

  Kevin.

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  Paul Robert Gaastra

  • September 27, 2009 23:55

  Thanks for that, Kevin.  I have downloaded the jcwren code.  It looks like it might be good.  I am afraid I haven't got time right now to see if I can understand it. 

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