Hello,
I’m working on a project (micro-mouse Robot) I’m Using C52 as EVB (main board) I have used AT89c52 microcontroller in this board.

My question is that, when I wrote my program to control the mouse using Kiel software it give me a message that:
(Error A45: undefined symbol (passs-2))
I got this message in the following links
all of these errors in i think about 5 or 6 instruction so i will be thankful to you if you can tell me the correct instructions, actually i have experience in 87C151SA which is compatible with Intel 87C51FA devices, and these two devices is the same as AT89c52 as i know.
so now these are the errors

mov IPL0, #10H ; Set Serial Interrupt Priority
mov IPH0, #00H ; to Level 1

SIsvc: mov IPL0, #00H ; Set Serial Interrupt Priority
mov IPH0, #10H ; to Level 2

mov IPL0, #10H ; Reset Serial Interrupt Priority
mov IPH0, #00H ; to Level 1

I got many errors all are in these two instructions

The other instructions are:

clr EC ; Disable PCA interrupt
clr CR ; Disable PCA timer
mov CL, #00H ; Clear PCA timer (low)
mov CH, #00H ; Clear PCA timer (high)
mov CMOD, #00H ; PCA Timer Clock = Osc/12
mov CCAPM1, #42H ; PWM mode, LH motor
mov CCAPM2, #42H ; PWM mode, RH motor
mov CCAPM3, #21H ;Positive edge, capture reg 3
mov CCAPM4, #21H ; Positive edge, capture reg 4


mov CCAP1H, #00 ; Set start at full speed L
mov CCAP2H, #00 ; Set start at full speed R

mov CCAP1H, LS ; Set speed L
mov CCAP2H, RS ; Set speed R
setb EC ; Enable PCA interrupt

stepI: jbc CCF3, stepl ; Left stepper interrupt?
jbc CCF4, stepr ; Right stepper interrupt?

Also in this instruction

mov RTMPL, CCAP4L

mov RTMPL, CCAP4L
mov RTMPH, CCAP4H


mov A, CCAP4L ; Find change in timer count
mov A, CCAP4H

mov LTMPL, CCAP3L

i know this post is to larg but this program is much importnat to me to successed and complate it on time.

thanks
Albarkani