Lpc2000

Hi All,

I am looking for code examples on how to set Code Protection on.

Eg  address  0x1FC   = 0x87654321

For GCC, Keil and IAR


Eg Does this look right?
// write to address macro
#define REG(addr) (*(static unsigned long *)(addr))

REG(0x1FC) = 0x87654321;

Or  would it be better loaded in the startup file.

Any pointers (pardon the phun..)  would be appreciated.


Thanks in Advance

Joe

--- In lpc2000@yahoogroups.com, "phlpcmicro" <joseph.goldburg@a...> 
wrote:

> I am looking for code examples on how to set Code Protection on.
> 
> Eg  address  0x1FC   = 0x87654321
> 
> For GCC, Keil and IAR
> 
> 
> Eg Does this look right?
> // write to address macro
> #define REG(addr) (*(static unsigned long *)(addr))
> 
> REG(0x1FC) = 0x87654321;
> 
> Or  would it be better loaded in the startup file.

You cannot do it in that way.  The address is in flash which cannot 
be written like RAM.

With GCC, you can do it like this, in startup.s (it compiles, not 
tested at runtime):

Vectors:
  B  Reset_Handler
  B  Undef_Panic
  B  SWI_Panic
  B  PAbort_Panic
  B  DAbort_Panic
  NOP
  B  IRQ_Panic
  B  FIQ_Panic

.org 0x01FC
  .word  0x87654321

In this way, you waste the 476 bytes between the vectors and the 
magic word.  You can put some other code between the vectors and 
the .org to waste less.

Karl Olsen