CMSIS and LPC1768

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Christophe Baranger

• July 20, 2010 15:04

Hello,

 

I am a little confuse (newbie) about how to use CMSIS with Crossworks and LPC17xx. As CMSIS provide a startup code in C and Crossworks provide a similar in assembler, which one do I need to use ?

 

Thanks for your help,

Regards

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  Jon Elliott

  • July 20, 2010 15:40

  It is confusing, I'm currently working on improving the CMSIS integration.

  For now though, choose one or the other. The advantage with the assembly code startup is that it is the first thing that runs so all the initialization code that runs prior to entering main (initialising .bss, copying .data, calling constructors, etc) will run at full speed and therefore make startup quicker.

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  Christophe Baranger

  • July 20, 2010 16:33

  Thanks for your answer.

  Do you have a very simple example/template project using CMSIS and LPC17xx in order to use it as a starting point ?

  Thanks for your help,

  Christophe. 

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  Roger Hill

  • July 20, 2010 20:28

  Hi Jon,

  I am trying to get the NXP standard peripheral library working in a LPC1768 project and am running into problems with apparent differences in the CMSIS LPC17xx.h header file.

  Have you any advice to offer on this before I have another go at getting it to work?

  Many thanks, Roger Hill

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  Jon Elliott

  • July 21, 2010 14:32

  I've just released an update to the LPC1000 support packages. The CMSIS startup code is now used for all projects and the CMSIS header files have been updated and should now be compatible with those in the current release of CMSIS.

  Regards,

  Jon Elliott

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  Roger Hill

  • July 22, 2010 02:14

   

  Man you guy's are on to it!!!

  Within 24 hours of asking for a little help you have released a whole package update to make our lives easier.

  I will leap into getting the NXP peripheral library up and running in the next day or two.

  Also thanks to Christophe for allowing me to slightly hijack his thread

  Many thanks, Roger...

   

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