Lpc2000

Yannick Hildenbrand wrote:

>Hello,
>
> 
>
>I just would like to add a small remark to this excellent analysis
>
> 
>
>The BLX instruction is available on architectures V5 and above (see the
>Addison-Wesley ARM Architecture Reference Manual). The LPC 2000 family uses
>the V4T architecture, and this means that BLX cannot be used. Be careful
>when specifying the core variant in the assembler argument list. If the
>right architecture is not correctly specified (or the default is e.g. V5 or
>above), the assembler may accept BLX but the code may have strange behavior
>on a LPC2000. Double checking this may avoid long hours of debugging.
>
> 
>  
>
I had been wondering which arch type was for the LPC2xxx family, thank 
you.  So, I would imagine that even if I built an arm9tdmi (armv5t) GCC 
compiler that I could restrict the code generation with "-mcpu=arm7tdmi 
-march=armv4t" then?

I'm asking as I also have an ARM920T system that I also build code for.  
I'm still pretty new to the details of the ARM variants (seems to be a 
lot of them ;-).


TomW


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
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