[ARM] Assembly program for lpc2147

[hirenn]

Hello !

anybody knows how can i write an assembly language program for ARM processor to find sum of
3P+4Q+9R, where P=2, Q=5 and R=4.

Thanks !

 

[david401040]

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Code ASM - [expand]
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clrf w
addlw 2
addlw 2
addlw 2
addlw 5
addlw 5
addlw 5
addlw 5
addlw 4
addlw 4
addlw 4
addlw 4
addlw 4
addlw 4
addlw 4
addlw 4
addlw 4

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w contains d'56'

would work on a pic ,is that your home work ?

 

[PA3040]

See this first

https://simplemachines.it/doc/arm_inst.pdf

 

[hirenn]

it's based on ARM lang, i cant understand that code,
can anybody give me basic tutorial link for arm7 32bit
thanks a lot

 

[hirenn]

i dont understand that code, can you please explain

 

[milan.rajik]

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Code ASM - [expand]
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mov r0, #2              ;move 2 to r0
mov r1, #3              ;move 3 to r1
mul r0, r0, r1          ;r0 = r0 * r1 (2 * 3)
mov r1, #5              ;move 5 to r1
mov r2, #4              ;move 4 to r2
mul r1, r1, r2          ;r1 = r1 * r2 (4 * 5)
add r0, r0, r1          ;r0 = r0 + r1 (3P + 4Q) = Z
mov r1, #4              ;move 4 to r1
mov r2, #9              ;move 9 to r2
mul r1, r1, r2          ;r1 = r1 * r2 (4 * 9)
add r0, r0, r1          ;r0 = r0 + r1 (Z + 9R)

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- - - Updated - - -

Zip and post Keil uVision project (asm template) for LPC2147. I will add my code and debug and put the result here. I just studied a book on ARM assembly programming and made the above code. Finally r0 register will hold the result.

 

[milan.rajik]

Try this.

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Code ASM - [expand]
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GLOBAL  Reset_Handler
                AREA    RESET, CODE, READONLY
                
                ENTRY
                
Reset_Handler
                
                mov r0, #12
                
stop    
                mov r0, #2              ;move 2 to r0
                mov r1, #3              ;move 3 to r1
                mul r2, r0, r1          ;r0 = r0 * r1 (2 * 3)
                mov r1, #5              ;move 5 to r1
                mov r3, #4              ;move 4 to r2
                mul r0, r1, r3          ;r1 = r1 * r2 (4 * 5)
                add r1, r0, r2          ;r0 = r0 + r1 (3P + 4Q) = Z
                mov r3, #4              ;move 4 to r1
                mov r4, #9              ;move 9 to r2
                mul r5, r3, r4          ;r1 = r1 * r2 (4 * 9)
                add r0, r1, r5          ;r0 = r0 + r1 (Z + 9R)
                
                B       stop
 
                end

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[hirenn]

what is AREA RESET, CODE, READONLY

and ENTRY

in code, why write it .

 

[milan.rajik]

I don't know about ARM Programming. I just saw an eample of creating a LPC ARM project in Keil on youtube and created the project and read a few pages about ARM assembly language and wrote the code. If you want to understand all those things then read a good book about ARM programming and Keil MDK ARM manual.

 

[PA3040]

**broken link removed**

 

[david401040]

Hirenn have your ever written any code for lpc21247 ?
could you post your attempt to solve this problem ?
David