how to solve the error...

STEPPER EQU P1
KEY EQU P2
KEY_1 EQU P2.0
KEY_2 EQU P2.1
KEY_3 EQU P2.2
KEY_4 EQU P2.3

Org 0h
Ljmp Main

Org 0200h
Main: Mov A, #00h
Mov Stepper, A
Mov Key, A
Setb Key_1
Mov A, Key
Jnz Ant_clk

clk_wise:mov Stepper, #0ch
Acall Delay_1ms
Mov Stepper, #06h
Acall Delay_1ms
Mov Stepper, #03h
Acall Delay_1ms
Mov Stepper, #09h
Acall Delay_1ms
Sjmp Main

Ant_clk:mov Stepper, #09h
Acall Delay_1ms
Mov Stepper, #03h
Acall Delay_1ms
Mov Stepper, #06h
Acall Delay_1ms
Mov Stepper, #0ch
Acall Delay_1ms
Ret

DELAY_1MS: MOV R6, #231D ; 1 MILLISECONDS DELAY
GOTO: NOP
NOP
DJNZ R6, GOTO
RET

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HiteshDR said:

i have problem in this code.
the ant_clk loop runs only once
on next time program enters to the ant_clk loop but its not completing the loop. the program is returing to the line one of the program after desplaying 09 on port1.

what should be the reason for not completeing the loop?
wher should be the mistak??

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mvs sarma said:

Sir, the equates are case sensitive if I am right. but in the listing that followed, you va used lower case also. please see to it-- ofcourse, I do agree that I am not an expert , not even an ameteur in programming.

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