[SOLVED] 8051 and RF data communication.

[torana]

please give me guide for this work.

programming and H/w side.

this h/w diagram i am using. is it correct.

i am confuse on 14 no. pin of both encoder and decoder.

 

[theta]

Hi

pin 14 is "Transmission enable, active low", try to go through the datasheet.

you can download the datasheet from https://www.futurlec.com/Others/HT12E.shtml

I have not studied the datasheet in detail but it seems your circuit may be incomplete. :!:

 

[niri]

Everything correct, you can do low or high on pin 14 using your code

 

[torana]

still it is not working



my receiving code
-------------------------

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Code ASM - [expand]
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org      00h
         sjmp     main
main:
 
         clr      p1.0
         
;====================tmt
clr p2.7;enable tmt
nop
mov p0,#00000001b
clr p2.7;enable tmt
nop
nop
nop
setb p2.7;diable tmt 
m:
setb p1.0
nop
nop
nop
nop
nop
nop
nop
nop
nop
sjmp m
end

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my transmitting code
-------------------------------

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Code ASM - [expand]
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org 0
sjmp main
 
main:
 
agn:
mov a,p0
cjne a,#00h,next
sjmp agn
next:
setb p1.0
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
clr p1.0
sjmp next
 
 
/*
sjmp agn
next :
cjne a,#11111001b,next2
clr p1.0
ret
next2:
cjne a,#11110110b,next3
n:
clr p1.0
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
setb p1.0
sjmp n
next3:
setb p2.1
*/
end

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