hello friends,

i hv problem in counting for direction and pluses , im using both intp with optical sensor for each intp , normally it works fine , but when shaft randomly change the direction of rotation it cant follow the correct direction , im using multiplexed led display ,do i need more than 2 sensor for correct counting ? more over it should not count on vibration ,pls fix these code , here are the code that im using for both intp;
IrqExt0:
NOP
; clr 26h.4
NOP
jbc 26h.1,rtn0 ; direction checking
jbc 26h.1,rtn0
NOP
setb 26h.2 ; set direction
setb 26h.2
; jb 26h.3,rtn0 ; save from vibration
; setb 26h.3
clr p1.1
setb p1.2
NOP

push acc
mov a,20h
inc a
mov 20h,a
cjne a,#0,exit0
mov a,21h
inc a
mov 21h,a
cjne a,#0,exit0
mov a,22h
inc a
mov 22h,a

exit0:
pop acc
mov 27h,20h
mov 28h,21h
mov 29h,22h
; clr ex0
; setb ex1


rtn0:
reti
;IrqExt1:
NOP
; clr 26h.3
NOP
jbc 26h.2,rtn1
jbc 26h.2,rtn1
NOP
NOP
setb 26h.1
setb 26h.1
; jb 26h.4,rtn1
; setb 26h.4
clr p1.2
setb p1.1
NOP

push acc
mov a,20h
cjne a,#01h,countd1 ;zero zero detect... should not down to zero
mov a,21h
cjne a,#0h,countd1
mov a,22h
cjne a,#0h,countd1
mov 20h,#01h
sjmp exit
countd1:
mov a,20h
dec a
mov 20h,a
cjne a,#0ffh,exit
mov a,21h
dec a
mov 21h,a
cjne a,#0ffh,exit
mov a,22h
dec a
mov 22h,a
cjne a,#0ffh,exit
exit:
pop acc
mov 27h,20h
mov 28h,21h
mov 29h,22h
; clr ex1
; setb ex0

rtn1:
reti
;***************************