Lpc2000

--- In lpc2000@yahoogroups.com, Gilles B <gilles_baracoda@y...> wrote:
> Hello everyone,
>  
> I am executing my program from flash memory, but I would like to 
relocate the IRQ vector and the code of the handlers (uart0_handler, 
timer0_handler,...) in RAM, so I won't miss incoming data from the 
UART while writing the internal flash using IAP routines.
>  
> I am using the GNU toolchain, but I couldn't find examples or 
documents about how to achieve this.
>  
> The parts I would like to relocate (IRQ vector + handlers) are 
written in assembly (actually it is Ashling's startup code for 
EVBA7), in the same section as the other vectors (reset, undef,...).
>  
> Do I have to relocate them all (vectors + code)? But then, the 
reset vector won't be anymore at address 0, and the code won't run 
after a hardware reset?
>  
> Does anyone know how to do this?
>  
> Thanks a lot,
>  
> Gilles
>  


I have an application where I need to reprogram application code from 
an MMC multimedia card.

The solution I've found is to have a flash programmer in the first 
sectors of flash which runs on reset. I then use the IAP commands to 
erase and write the application code I read off the MMC card. The 
application code is compiled to run from a set sector start.

Once programming is finished I copy the vector table from the 
application software into ram, remap the vector table to ram and jump 
to the start of the application code.

It works for me.