PWM in PIC16F84?

M

m_saeed_soliman

New Member

• Jun 2, 2008

• #1

Hi all
Is there PWM facility in PIC 16F84?
If not , how can i do it manually using Basic language
Thank you for your replies in advance

 

blueroomelectronics

Well-Known Member

• Jun 2, 2008

• #2

Use a 16F628A instead, cheaper and has PWM in hardware.

 

M

m_saeed_soliman

New Member

• Jun 2, 2008

• #3

in our city there is no 16F628A
so how can i do PWM manually in PIC16F84?
thanks for your help :blueroom"

 

Mike - K8LH

Well-Known Member

• Jun 2, 2008

• #4

Then you should probably tell us a little more about your requirements;

(1) PWM period?
(2) Duty Cycle resolution?
(3) Clock frequency?
(4) Schematic?
(5) Language (assembler, BASIC, C)?

Mike

 

Norlin

New Member

• Jun 2, 2008

• #5

he said Basic, you could just turn a pin on and off with a delay in between. So:
on
delay x
off
delay y
repeat

that would be your simplest PWM, adjust x and y to suit your required duty cycle and frequency (noting your frequency will obviously be affected by your crystal)

 

Mike - K8LH

Well-Known Member

• Jun 2, 2008

• #6

I missed that. Thank you...

 

blueroomelectronics

Well-Known Member

• Jun 2, 2008

• #7

Problem with doing it in BASIC (unless the BASIC has a PWM command) it may not leave much time for anything else. What PWM period (frequency) are you hoping for? How many channels (motors)?

 

J

joshua17ss2

New Member

• Jun 2, 2008

• #8

Pic basic pro has 2 commands that might work, they support pulsout, which i have used to drive servos, and they also have PWM command, i havent used this one. but it is one of the instruction sets in basic

 

M

m_saeed_soliman

New Member

• Jun 3, 2008

• #9

thank you all
but there is one problem
i will drive a motor wuth PWM but iwant to do other things while doing PWM , so this is a big probelm
thanks after all