syntax unified cpu cortex m 3 AREA text, CODE, READONLY equ SVC NUM, 0 0 6 0 0 6 is the last 3 digit of BITS ID thumb global SVC Handler SVC Handler TST lr , 4 ITE EQ MRSEQ r 0 , MSP Correct register names MRSNE r 0 , PSP MOV r 1 , r 0 R 1 holds the address of the SVC instruction LDRB r 0 , r 1 , 2 Load the SVC instruction AND r 0 , r 0 , 0 xFF Mask to extract the SVC number CMP r 0 , SVC NUM BNE not matched SVC number matches BITS ID , perform addition LDR r 2 , 8 4 0 0 6 BITS ID last 5 digits LDR r 3 , 8 4 0 0 6 BITS ID last 5 digits ADD r 0 , r 2 , r 3 Perform addition B svc done not matched SVC number doesn't match BITS ID , perform subtraction LDR r 2 , 8 4 0 0 6 BITS ID last 5 digits LDR r 3 , 8 4 0 0 6 BITS ID last 5 digits SUB r 0 , r 2 , r 3 Perform subtraction svc done Return from SVC handler, restoring original stack and returning to application TST lr , 4 ITE EQ MRSEQ r 1 , MSP MRSNE r 1 , PSP LDMIA r 1 , r 0 r 3 Restore context, note the use of lowercase registers MOV lr , r 3 Restore LR BX lr Return to the application In the above code on ARM keil v 5 , i am gettng below 7 errors, Can you please help rectify these errors and provide me a error free code to run Using Compiler ' V 5 0 6 update 6 ( build 7 5 0 ) ' , folder ' C Keil v 5 ARM ARMCC Bin ' Rebuild target 'Target 1 ' assembling Q 3 m 1 s Q 3 m 1 s ( 1 ) error A 1 1 3 7 E Unexpected characters at end of line Q 3 m 1 s ( 2 ) error A 1 1 3 7 E Unexpected characters at end of line Q 3 m 1 s ( 3 ) error A 1 1 3 5 E Area name missing Q 3 m 1 s ( 4 ) error A 1 1 3 7 E Unexpected characters at end of line Q 3 m 1 s ( 5 ) error A 1 1 3 7 E Unexpected characters at end of line Q 3 m 1 s ( 6 ) error A 1 1 3 7 E Unexpected characters at end of line Q 3 m 1 s ( 7 ) error A 1 3 5 5 U A Label was found which was in no AREA Objects Q 3 m 1 axf 7 Error ( s ) , 0 Warning ( s ) Target not created Build Time Elapsed 0 0 0 0 0 0

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Question: . syntax unified . cpu cortex - m 3 AREA . text, CODE, READONLY . equ SVC _ NUM, 0 0 6 / / 0

.

syntax unified

.

cpu cortex

-

3

AREA

.

text, CODE, READONLY

.

equ SVC

_

NUM,

006 / / 006

is the last

3

digit of BITS ID

.

thumb

.

global SVC

_

Handler

SVC

_

Handler

TST lr

,

4

ITE EQ

MRSEQ r

0,

MSP

/ /

Correct register names

MRSNE r

0,

PSP

MOV r

1,

0 / /

1

holds the address of the SVC instruction

LDRB r

0, [

1,

- 2] / /

Load the SVC instruction

AND r

0,

0,

0

xFF

/ /

Mask to extract the SVC number

CMP r

0,

#SVC

_

NUM

BNE not

_

matched

/ /

SVC number matches BITS ID

,

perform addition

LDR r

2, = 84006 / /

BITS ID last

5

digits

LDR r

3, = 84006 / /

BITS ID last

5

digits

ADD r

0,

2,

3 / /

Perform addition

B svc

_

done

not

_

matched

/ /

SVC number doesn't match BITS ID

,

perform subtraction

LDR r

2, = 84006 / /

BITS ID last

5

digits

LDR r

3, = 84006 / /

BITS ID last

5

digits

SUB r

0,

2,

3 / /

Perform subtraction

svc

_

done

/ /

Return from SVC handler, restoring original stack and returning to application

TST lr

,

4

ITE EQ

MRSEQ r

1,

MSP

MRSNE r

1,

PSP

LDMIA r

1!, {

0 -

3} / /

Restore context, note the use of lowercase registers

MOV lr

,

3 / /

Restore LR

BX lr

/ /

Return to the application

In the above code on ARM keil v

5,

i am gettng below

7

errors, Can you please help rectify these errors and provide me a error free code to run

* * *

Using Compiler

'

5.06

update

6 (

build

750)',

folder:

'

\

Keil

_

5 \

ARM

\

ARMCC

\

Bin

'

Rebuild target 'Target

1'

assembling Q

3

1 .

. . .

3

1 .

(1)

: error: A

1137

E: Unexpected characters at end of line

3

1 .

(2)

: error: A

1137

E: Unexpected characters at end of line

3

1 .

(3)

: error: A

1135

E: Area name missing

3

1 .

(4)

: error: A

1137

E: Unexpected characters at end of line

3

1 .

(5)

: error: A

1137

E: Unexpected characters at end of line

3

1 .

(6)

: error: A

1137

E: Unexpected characters at end of line

3

1 .

(7)

: error: A

1355

U: A Label was found which was in no AREA

" . \

Objects

\

3

1 .

axf"

- 7

Error

(

), 0

Warning

(

) .

Target not created.

Build Time Elapsed:

00

00

00

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