DTMF help

G

gagandeep

New Member

• May 1, 2012

• #1

Can anyone please help me in writing code for DTMF MT 8870 with 8051

i am getting data from dtmf but 8051 is not reading data. i am attaching circuit diagramView attachment 63851

please help

 

Jon Wilder

Active Member

• May 2, 2012

• #2

Can you also post up your code as well?

 

G

gagandeep

New Member

• May 2, 2012

• #3

thnx for reply
please help
here is code

org 00h
mov p2,#000h
mov p0,#0ffh

setb p3.7

start: mov a,p1

mov p2,a
cpl p3.7
jmp start;

 

Jon Wilder

Active Member

• May 3, 2012

• #4

OK...you'll need a bit more code than that to make this thing work. However, I need a bit more information as to what your project is supposed to do when all is said and done. Can you give me a description of what you are trying to make this circuit do?

 

G

gagandeep

New Member

• May 3, 2012

• #5

i simply wants to switch on the relay connected on p2 ON & OFF by pressing 1 & 2 from mobile

data is changing on o/p of dtmf but P89v51rd2 is not reading it and not giving o/p on p2

 

Last edited: May 3, 2012