CRP on LPC1768

On a LPC24xx, you place this

                AREA    |.ARM.__at_0x01FC|, CODE, READONLY
CRP_Key         DCD     0x87654321
                                AREA     |.text|, CODE, READONLY

after the interrupt vector. I don't know your chip well just that the CRP codes are the same as many other peripherals etc. I believe this is the construct the compiler will accept for you too but I don't know exactly where to place it in the startup code.

On a LPC24xx, you place this

                AREA    |.ARM.__at_0x01FC|, CODE, READONLY
CRP_Key         DCD     0x87654321
                                AREA     |.text|, CODE, READONLY

after the interrupt vector. I don't know your chip well just that the CRP codes are the same as many other peripherals etc. I believe this is the construct the compiler will accept for you too but I don't know exactly where to place it in the startup code.

                IF      :LNOT::DEF:NO_CRP
                AREA    |.ARM.__at_0x02FC|, CODE, READONLY
CRP_Key         DCD     0xFFFFFFFF
                ENDIF

The above is copied from startup_LPC17xx.s (NXP's code.bundle.lpc17xx.keil).
So, I believe that, you can find the CRP_Key setting in the KEIL startup.s for LPC17xx.

John,

The OP was interested in ENABLING CRP. Your code snippet does not;

It should have been

CRP_Key         DCD     0x12345678

for CRP1,
or

CRP_Key         DCD     0x87654321

for CRP2
or

CRP_Key         DCD     0x43218765

for CRP3.

Hi Tamir,

I remember that you have already start the real development on LPC17xx Cortex-M3. Do you use the new programming model? I mean the Software Driver Model.

lpc17xx.cmsis.driver.library.zip:

ics.nxp.com/.../code.bundle.lpc17xx.keil.zip

More and more documentation need to be read, I am a little frustrated.

John,

I only wrote 2 small bootloader for this chip so I don't know it too well - still working with LPC2478. But once we start with the C model (we still did not start with B though...) - I will ! Thanks for the link.