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Asm programming

Hello
Where can I find some example programs only in asm to be compiled inder Keil MDK?
I can't compile simple programs as:

STACK_TOP   EQU   0x20002000         ; constant for SP starting value
            AREA  |Header Code|, CODE
            DCD    STACK_TOP  ; Stack top
            DCD    Start      ; Reset vector
            ENTRY             ; Indicate program execution start here
Start       ; Start of main program
            ; initialize registers
            MOV   r0,  #10    ; Starting loop counter value
            MOV   r1,  #0     ; starting result
            ; Calculated 10+9+8+...+1
loop
            ADD   r1,  r0     ; R1R1 + R0
            SUBS  r0,  #1     ; Decrement R0, update ï¬‚ ag (â€œSâ€ sufï¬ x)
            BNE   loop        ; If result not zero jump to loop
            ; Result is now in R1
deadloop
            B     deadloop    ; Inï¬ nite loop
            END               ; End of ï¬ le

Keil gives an error:
Error: L6320W: Ignoring --entry command. Cannot find argument 'Reset_Handler'.

How to change this program? How to change linker control string?

I tried also to add startup code fo nxp1766 but then i still have an error that label __main is missing.

Could You help me and give me some simple programs just to compile it properly?

Parents

0 Czarek Zegarek over 15 years ago in reply to Czarek Zegarek

Finally I wrote a program which can be compiled in Keil:

; <h> Stack Configuration
;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Stack_Size      EQU     0x00000200

                AREA    STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem       SPACE   Stack_Size
__initial_sp


; <h> Heap Configuration
;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Heap_Size       EQU     0x00000000

                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem        SPACE   Heap_Size
__heap_limit

                PRESERVE8
                THUMB

; Vector Table Mapped to Address 0 at Reset

                AREA    RESET, DATA, READONLY
                EXPORT  __Vectors

__Vectors       DCD     __initial_sp              ; Top of Stack
                DCD     Reset_Handler             ; Reset Handler



                AREA    Program, CODE, READONLY

                                EXPORT Reset_Handler            ;Defines the program starting point

;Program start

Reset_Handler

                        MOV             R1, #0

                        MOVW    R3, #0xC040             ;P2.2, P2.3, P2.4, P2.5, and P2.6 function mode is located at FP2DIR (0Ã—2009_C040).
                        MOVT    R3, #0x2009

                        MOVW    R2, #0x007C             ;P2.2  -> Bit[2] * P2.3  -> Bit[3]* P2.4  -> Bit[4]* P2.5  -> Bit[5]* P2.6  -> Bit[6] -> Output dir : 1
                        MOVT    R2, #0x0000             ;/* b0000_0000_0000_0000_0000_0000_0111_1100 */
                        STR     R2, [R3, #0]


loop

                        B       loop

                        END

The first part was copied from build-in startup file.
But it didn't fix the problem....

Reply

0 Czarek Zegarek over 15 years ago in reply to Czarek Zegarek

Finally I wrote a program which can be compiled in Keil:

; <h> Stack Configuration
;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Stack_Size      EQU     0x00000200

                AREA    STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem       SPACE   Stack_Size
__initial_sp


; <h> Heap Configuration
;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Heap_Size       EQU     0x00000000

                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem        SPACE   Heap_Size
__heap_limit

                PRESERVE8
                THUMB

; Vector Table Mapped to Address 0 at Reset

                AREA    RESET, DATA, READONLY
                EXPORT  __Vectors

__Vectors       DCD     __initial_sp              ; Top of Stack
                DCD     Reset_Handler             ; Reset Handler



                AREA    Program, CODE, READONLY

                                EXPORT Reset_Handler            ;Defines the program starting point

;Program start

Reset_Handler

                        MOV             R1, #0

                        MOVW    R3, #0xC040             ;P2.2, P2.3, P2.4, P2.5, and P2.6 function mode is located at FP2DIR (0Ã—2009_C040).
                        MOVT    R3, #0x2009

                        MOVW    R2, #0x007C             ;P2.2  -> Bit[2] * P2.3  -> Bit[3]* P2.4  -> Bit[4]* P2.5  -> Bit[5]* P2.6  -> Bit[6] -> Output dir : 1
                        MOVT    R2, #0x0000             ;/* b0000_0000_0000_0000_0000_0000_0111_1100 */
                        STR     R2, [R3, #0]


loop

                        B       loop

                        END

The first part was copied from build-in startup file.
But it didn't fix the problem....

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