adcin and HPWM

[lerameur]

I found a working program from steve in another thread:
@ DEVICE MCLR_ON, INTRC_OSC, WDT_ON, LVP_OFF, BOD_OFF, PWRT_ON, PROTECT_OFF, CCPMX_ON
OSCCON=$60 ' use internal 4MHZ osc
PAUSE 100 ' start-up delay
TRISB=0
DEFINE CCP1_REG PORTB
DEFINE CCP1_BIT 3
HPWM 1,128,1000
HERE: GOTO HERE

I just change the oscillation to 20Mhz, and it si not working: I think this is the problem..
I change the program to:

@ DEVICE MCLR_ON, HS_OSC, WDT_ON, LVP_OFF, BOD_OFF, PWRT_ON, PROTECT_OFF, CCPMX_ON
DEFINE OSC 20 'use external 20mhz crystal 'OSCCON=$60 ' use internal 4MHZ osc
PAUSE 100 ' start-up delay
TRISB=0
DEFINE CCP1_REG PORTB
DEFINE CCP1_BIT 3
HPWM 1,128,1000
HERE: GOTO HERE

[skimask]

CCPMX_ON .... that should be off....

That's one problem I'm thinking of. Not reading the right pin...

I found a working program from steve in another thread:

Look at your manual under HPWM. Can't do 1000 Hz at 20Mhz...

[lerameur]

19531Hz for a 20Mhz

I remember using 5Khz for one of my project for motor driver PWM.

How can I change steve's program to use a 20Mhz crystal?

[skimask]

19531Hz for a 20Mhz

I remember using 5Khz for one of my project for motor driver PWM.

How can I change steve's program to use a 20Mhz crystal?

The MINIMUM is 1221 hz, the max is 19531 hz. Can't do a lot about is, built into the hardware.
Steve has a program called MultiCalc. Check it out...

[lerameur]

well 10800hz fall well within those range , so no problem there.

k

[skimask]

well 10800hz fall well within those range , so no problem there.

Ok... In the last couple of posts, the freq wasn't 10.8khz.

[lerameur]

I changed the header to
INCLUDE "modedefs.bas" 'Includes supoprt for PicBasic language
@ DEVICE pic16F88,CCPMX_ON

' Setup Crystal oscillator Frequency to be used by PIC chip in MHz
DEFINE OSC 20 'use external 20mhz crystal


and it is now working.

Ok... In the last couple of posts, the freq wasn't 10.8khz.
....really? I only see 10800hz in my post, where is the typo

k