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How to load and execute from RAM

Viktor Bucher

As I understand we must define both RAM_MODE and REMAP in ASM settings, but what about the linker settings ?

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  • 0 in reply to Keil Software Support Intl.

    In the startup.s file for this project (section included below) it appears that if 'REMAP' isn't set, then RAM_MODE isn't even checked (and the MEMMAP register is never set). So I think REMAP also needs to be defined.

    --------------------------------------------
    ; Memory Mapping (when Interrupt Vectors are in RAM)
    MEMMAP EQU 0xE01FC040 ; Memory Mapping Control
    IF :DEF:REMAP
    LDR R0, =MEMMAP
    IF :DEF:RAM_MODE
    MOV R1, #2
    ELSE
    MOV R1, #1
    ENDIF
    STR R1, [R0]
    ENDIF

Reply
  • 0 in reply to Keil Software Support Intl.

    In the startup.s file for this project (section included below) it appears that if 'REMAP' isn't set, then RAM_MODE isn't even checked (and the MEMMAP register is never set). So I think REMAP also needs to be defined.

    --------------------------------------------
    ; Memory Mapping (when Interrupt Vectors are in RAM)
    MEMMAP EQU 0xE01FC040 ; Memory Mapping Control
    IF :DEF:REMAP
    LDR R0, =MEMMAP
    IF :DEF:RAM_MODE
    MOV R1, #2
    ELSE
    MOV R1, #1
    ENDIF
    STR R1, [R0]
    ENDIF

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