Lpc2000

At 11:37 AM 5/25/05 -0400, Brett Delmage wrote:

> >Now, can anyone tell me if there is clean, way to generate faster 
> code than:
> >
> >#define REG(addr) (*(volatile unsigned long *)(addr))
> >#define REG8(addr) (*(volatile char *)(addr))

Robert Adsett wrote:

> IE in the appropriate ld control file I have something like
>
> I find that 'cleaner' than pointer de-references.  YMMV  The biggest
> disadvantage is you end up depending on both the ld file and the header
> file.  I don't know how the code generation compares.
>
> You can see this in the newlib-lpc source.

Excellent. Thank you Robert! That is exactly what I wanted to do 
eventually. I have coded that way wih other CPUs and build tools and I 
agree that it is "cleaner".
At this point, I'm learning one new element at a time, and didn't want 
to dive into the linker in that detail yet. This past week I was happy, 
even with rougher code,  to get SPI to work with 3 different (types of) 
devices. The great thing about SPI (not) is that there are so many modes 
that every manufacturer can pick a unique one  :-p   = :o
I am glad to say that the LPC SPI, limited as it is, was up to the 
challenge.

   Brett