LPC2368 bootloader and RL-ARM

Hello,

My RTX application works perfectly, it's the RTX_Blinky demo project.

Exactly what happens/doesn't happen?
It goes to the SWI_Handler

 SWI_Handler     B       SWI_Handler

Thanks for your help.

The problem is that the default LPC2368 behavior is to look for interrupt vectors table in the start of the flash (0x40000000).
Specific, The RTX application go there every OS switching (to SWI_handler).

But in your case the vectors table that reside in flash beginning is the bootloader one, not the one of RTX Application.

To resolve this problem, you have to add the following options to the Startup File (LPC2300.S) of your application, in Options - Asm - Define :
RAM_INTVEC REMAP RAM_MODE

Now the startup procedure will copy the interrupt vectors table to the RAM and will look for it there.
(I hope that your startup file version recognize all these options, if not I copy that in message end).

Additionally, you have to change memory area for application in Options for Target -> Target -> Read\Write memory area to start from 0x40000100 and contain only 0x7F00 (possible lower, but this for safty).
So, the application will leave the vectors table RAM untouchable.

Code for LPC2368.S
Insert if not exist before stack setup for each mode:

; Copy Exception Vectors to Internal RAM ---------------------------------------

                IF      :DEF:RAM_INTVEC
                ADR     R8, Vectors         ; Source
                LDR     R9, =RAM_BASE       ; Destination
                LDMIA   R8!, {R0-R7}        ; Load Vectors
                STMIA   R9!, {R0-R7}        ; Store Vectors
                LDMIA   R8!, {R0-R7}        ; Load Handler Addresses
                STMIA   R9!, {R0-R7}        ; Store Handler Addresses
                ENDIF


; Memory Mapping (when Interrupt Vectors are in RAM) ---------------------------

MEMMAP          EQU     0xE01FC040          ; Memory Mapping Control
                IF      :DEF:REMAP
                LDR     R0, =MEMMAP
                IF      :DEF:EXTMEM_MODE
                MOV     R1, #3
                ELIF    :DEF:RAM_MODE
                MOV     R1, #2
                ELSE
                MOV     R1, #1
                ENDIF
                STR     R1, [R0]
                ENDIF

Ok, it works now.
Thank you very much

This is strange, I still dont understand why this is occurring.

1. The new code that I download (using my bootloader via USB) is built with the RTX kernal.

2. If my bootloader is built with an RTX then I can boot the new code correctly.

3. If my bootloader is built without an RTX then Im unable to boot the new code.

4. Both bootloaders (with or without an RTX) will execute code (that contains no RTX) correctly.

In both cases the new code starts at address 0x5000 and has the correct options in the startup file.

Any ideas why?

I used the code USB secondary ISP bootloader for LPC23xx from NXP, it does not work with RTX os.

How I can fix? please help.

Mark,
I have the same issue. Have you managed to solve the problem?