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lock project---password display problem.

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Coitsu

Tue Nov 24 2009, 06:46PM

Registered Member #22660

Joined: Fri Oct 02 2009, 10:17PM

Posts: 16
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I have another problem with the same project... I want to use a speaker using the free port(p3.4) and I already have my own code to make a sound but I dont know where to put it... I wanna use the frequecy out of the p3.4 to connect it through a resistance which is connected to the base of a transistor, the emitter is connected to ground and the colector is connected to the negative side of the speaker and the positive to 5V.

Plz, I really need help with this... I've tried to figure it out but with no successful results...

here's my code to make a sound using a speaker and a frequency as input... also i'm using a led the check if everything is ok..

org 00h
jmp INIC
t2ms:
mov R1, #230
LX: nop
nop
nop
nop
nop
nop
DJNZ R1, LX
MOV R2, #230
LB: NOP
NOP
NOP
NOP
NOP
NOP
DJNZ R2, LB
ret

t1.5ms:
mov R1, #230
L3: nop
nop
nop
nop
nop
nop
DJNZ R1, L3
MOV R2, #115
LZ: NOP
NOP
DJNZ R2, LZ
ret

t50ms: mov R2, #50
L8: mov R1, #230
L6: nop
nop
nop
nop
nop
nop
DJNZ R1, L6
DJNZ R2, L8
ret

LEDON2: setB p3.4
call t1.5ms

clr p3.4

call t1.5ms
ret

LEDON3: setB p3.4
call t2ms

clr p3.4

call t2ms
ret

INIC:
MOV R4, #166
LEDON:
CALL LEDON2
DJNZ R4, LEDON

MOV R5, #120
LAZO1: CALL LEDON3
DJNZ R5,LAZO1

SJMP INIC

;sjmp ledon
unseg:
MOV R3, #240
L7: call t2ms
djnz r3, L7
ret

Welcome to my electronic world

Ajay Bhargav

Wed Nov 25 2009, 01:17AM

Rickey's World Admin

Registered Member #1

Joined: Fri Feb 24 2006, 04:56AM

Posts: 7567
Thanked 1331 times in 1255 posts

I have already replied to one of the thread you posted, please try not to post multiple threads. I am locking this thread. and continue with other thread you posted.

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