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20ms pulse using PIC16F84A

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phyoon

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hi guys..

i'm a newbie to pic and currently doing my final year project. my question is how to make a 20ms pulse by using a 4mhz pic16f84a? hope sum1 can teach/guiding me.

thx

picnewbie
 

just check out this link! It's pretty simple!

Giri
 

hmm... i'm sorry i can't get it. cud u explain it for me? generate just a single pulse from pic. it makes me blurish some.

but anyway thanx Giri for the website. :)
 

First construct a loop structure like the following
(This structure is similar for all processors)
_____________________________________________
delay:
mov a,some_value
dec a
(you can have some nop's in between if you like)
conditional jump to delay( if a == 0)
_____________________________________________

This instructions for the delay routine can be subtituted for a given processor.
now calculate the value the register should be initialised.
If the total delay obtain by this structure is lesser, u can call this structure multiple times.
If more info is required then you can go through the book on PIC by MYKE PREDKO
 

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