PIC 18F4431 Power PWM , i am lost!

Status
Not open for further replies.
M

max_imum2000

New Member
i am playing around with these 40pin pics .
i am trying to control three 12v DC motors (not steppers , not servo) over h-bridge, with no feedback.
the 18F4431 has power pwm module that comes build in to provide up to 8 channels in complemntry mode
however i read the datasheet on the power pwm module and cant understand how to work with this module easly.
i downloaded several application notes, but most of them are reffering to ccp pwm .
i will appricate any help or any step by step instruction on how to do that

thank you
 
Here is a code snippet to initialize the PWM module. It is not yet been tested since I had set that project aside for now. I hope it helps you get started.

You define the value of PTPER_VAL to set the PWM frequency. See table 17-2 of the PIC18F4431 datasheet for the suggested values.

Code: 
;-----------------------------------------------------------
;   Init PWM module
;
         MOVLW    1<<PTMOD1       ; 1:1 prescale,1:1 postscale, up/down
         MOVWF    PTCON0
;
         MOVLW    1<<PWMEN2|1<<PWMEN1|1<<PMOD1|1<<PMOD0
         MOVWF    PWMCON0
;
         MOVLW    0               ; 1:1 Postscale
         MOVWF    PWMCON1
;
         MOVLW    LOW  PTPER_VAL
         MOVWF    PTPERL
         MOVLW    HIGH PTPER_VAL
         MOVWF    PTPERH
;
         CLRF     DTCON
;
         BSF      PTCON1,PTEN     ; Fire up the PWM module
 
Status
Not open for further replies.

Similar threads

P
What am I missing here?
Replies
2
Views
2K
Pommie
P
S
  • Question
Ds1307 RTC Power Problem with battery
Replies
12
Views
3K
fourtytwo
F
S
  • Question
DS1307 RTC Problem with Unplugging Power Supply
Replies
10
Views
4K
Nigel Goodwin
A
  • Question
PIC: Dumb question re banksel
Replies
11
Views
3K
augustinetez
A
A
  • Question
Solved PIC Frequency counter - Interesting quandary
2
Replies
23
Views
3K
Mike - K8LH
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…