Hwpw

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- 20th June 2025, 17:26
l_gaminde

Hwpw

Im running a few chips 16f876a at 20 mhz, 18f26k22 10mhz with 4x speed so 40mhz

Even using timer 1 and timer 2 with two different ports, portc1 and portc2 you can not get two different PW is this correct

I have also noticed at times one pulse is half the duty cycle other times it can be changed this could be because i used the same timer for both

Code:

define OSC 40 OSCCON2.7 = 1 ' SYSTEM CLOCK 1=4XPLL 0= OSCILLATOR OTHER THAN 4XPLL TRISA = %11111010 TRISB = %11111100 ADCON1 = %0110 ADCON0 = %000 T0CON = %00000000 INTCON = %00000000 INTCON2 = %00000000 LED VAR PORTA.5 ' Assign name "LED" to PORTA.5 HIGH LED PAUSE 2000 LOW led PWM PORTA.5, 64, 6000 DEFINE CCP1_REG PORTC ' USED FOR HWPW DEFINE CCP1_BIT 2 ' USED FOR HWPW PORTC PIN 2 DEFINE HPWM2_TIMER1 ' DEFINE TIMER USE FOR PWM DEFINE CCP2_REG PORTC ' USED FOR HWPW DEFINE CCP2_BIT 1 ' USED FOR HWPW PORTC PIN 1 DEFINE HPWM1_TIMER2 ' DEFINE TIMER USE FOR PWM HPWM 1, 128, 5000 ' OUTPUT PORTC.2 'HPWM 2, 64, 5000 ' OUTPUT PORTC.1 ' HPWM 1, 128, 39000 ' HIGHEST HPWM @ 50% DUTY 78.06 khz ' HPWM 1, 128, 30000 ' HPWM @ 50% DUTY 60.19 khz ' HPWM 1, 128, 20000 ' HPWM @ 50% DUTY 39.96 khz ' HPWM 1, 128, 10000 ' HPWM @ 50% DUTY 19.98 khz ' HPWM 1, 128, 5000 ' HPWM @ 50% DUTY 9.99 khz ' HPWM 1, 128, 2441 ' LOWEST HPWM @ 50% DUTY 4.88 khz
- 21st June 2025, 07:07
richard

Re: Hwpw

a pic18f26k22 can have 5 different pwm streams with 3 different frequencies all with individual duty cycles, old clunker chips like 16f876a are much less capable of course

here is 3 streams 3 frequencies
i find the hpwm command pretty inflexible and seldom use it [the clock defines are not correct in mho] , pwm is not difficult to setup manually

Code:

'**************************************************************** '* Name : PWM demo.pbp * '* Author : Richard * '* Notice : * '* : * '* Date : 21/12/2024 * '* Version : 1.0 * '* Notes : TMR2 CCP4 10K, TMR4 CCP5 12.5K, TMR6 CCP1 8K * '* :18f26k22 @64Mhz * '**************************************************************** #CONFIG CONFIG FOSC = INTIO67 CONFIG PLLCFG = ON CONFIG PRICLKEN = ON CONFIG FCMEN = OFF CONFIG IESO = OFF CONFIG PWRTEN = ON CONFIG BOREN = SBORDIS CONFIG BORV = 190 CONFIG WDTEN = ON CONFIG WDTPS = 32768 CONFIG CCP2MX = PORTC1 CONFIG PBADEN = OFF CONFIG CCP3MX = PORTB5 CONFIG T3CMX = PORTC0 CONFIG HFOFST = ON CONFIG P2BMX = PORTB5 CONFIG MCLRE = EXTMCLR CONFIG STVREN = ON CONFIG LVP = OFF CONFIG XINST = OFF CONFIG DEBUG = OFF CONFIG CP0 = OFF CONFIG CP1 = OFF CONFIG CP2 = OFF CONFIG CP3 = OFF CONFIG CPB = OFF CONFIG CPD = OFF CONFIG WRT0 = OFF CONFIG WRT1 = OFF CONFIG WRT2 = OFF CONFIG WRT3 = OFF CONFIG WRTC = OFF CONFIG WRTB = OFF CONFIG WRTD = OFF CONFIG EBTR0 = OFF CONFIG EBTR1 = OFF CONFIG EBTR2 = OFF CONFIG EBTR3 = OFF CONFIG EBTRB = OFF #ENDCONFIG DEFINE OSC 64 ANSELB=0 ANSELC=0 ANSELA=0 trisa=% 11101111 trisb=% 11111110 trisc=% 11111001 OSCCON=$70 OSCTUNE.6=1 T2CON=6 ;PRESCALE 16 TMR ON T4CON=6 ;PRESCALE 16 TMR ON T6CON=6 ;PRESCALE 16 TMR ON PR2=$63 ;10 KHZ PR4=$4F ;12.5 KHZ PR6=$7C ;8 KHZ CCP4CON = $0C ;PWM MODE + DUTY LSB 2 BITS CCPR4L = $32 ;DUTY MSB 8 BITS CCP5CON = $0C ;PWM MODE + DUTY LSB 2 BITS CCPR5L = $27 ;DUTY MSB 8 BITS CCP1CON = $0C ;PWM MODE + DUTY LSB 2 BITS CCPR1L = $3E ;DUTY MSB 8 BITS CCPTMRS1 = 4 ;TMR2 CCP4, TMR4 CCP5 CCPTMRS0 = 2 ;TMR6 CCP1 main: goto main
- 23rd June 2025, 22:34
l_gaminde

Re: HWPW

I ran your program and according to the scope they all are running the same freq. with different pulse width
- 24th June 2025, 00:38
richard

2 Attachment(s)

Re: Hwpw

Quote:

I ran your program and according to the scope they all are running the same freq. with different pulse width

not really they all are running the same pulse width with different freq.
- 24th June 2025, 00:49
l_gaminde

Re: Hwpw

Well, I don't know what to say. I get all the same frequency with different pulse width.
Even the program shows different pulse width.
I even went back to the pick basic plus and i'm running for with four different timers, and they all run the same frequency, and if you set it for a different frequency, they shut down pulse width, I can control
- 24th June 2025, 01:07
richard

Re: Hwpw

Quote:

Even the program shows different pulse width.

what do you mean ,that makes little sense

Quote:

Well, I don't know what to say. I get all the same frequency with different pulse width.

my code works perfectly on the simulator and the actual hardware
post your code and schematic .
- 24th June 2025, 02:25
l_gaminde

Re: Hwpw

I ran the code that you posted.
- 24th June 2025, 02:40
l_gaminde

Re: Hwpw

Walking and talking on the phone does not work well.
I ran your program my scope has measure function all 3 channels showed the same frequency. But the duty cycle was the only difference. I used pbp setting ccp1, ccp2, ccp3 and ccp5 port c1, c2, and port b0, b5 there is also no control of individual frequency only duty cycle
- 24th June 2025, 03:03
richard

Re: Hwpw

If you don't get three frequencies with 50% duty cycle then you are not using my code ,chip or schema.

Post your code and schema
- 24th June 2025, 04:38
l_gaminde

Re: Hwpw

I will rerun tomorrow and post scope pictures. Its
definitely possible. I did something wrong. I am only running at 40 MHz. At this time, I have 16 mhz crystal's coming.
- 24th June 2025, 06:55
richard

Re: Hwpw

Quote:

I have 16 mhz crystal's coming.

totally not needed for this simple test, it uses internal osc
- 24th June 2025, 16:57
l_gaminde

Re: Hwpw

RICHARD
I reloaded your program exactly and it gave me
12.54khz with a duty of 48.75 PW on channel A1
8.02khz with a duty of 49.61 on channel C2
10.02khz with a duty of 50.01 on channel B0

You were absolutely correct and it works perfectly
do you have any documentation of the settings and what to change for different freq and duty cycles Im just getting back into this after years of being away
- 24th June 2025, 19:11
l_gaminde

Re: Hwpw

RICHARD I need to change porta4 hwpw to another port i tried ccp3con and ccpr3l changed the ccptmrs0 but nothing works I have something else on a4 on the boards im using
- 25th June 2025, 00:06
richard

Re: Hwpw

Quote:

do you have any documentation of the settings and what to change for different freq and duty cycles

https://www.picbasic.co.uk/forum/showthread.php/4994
https://www.picbasic.co.uk/forum/showthread.php/26615
or use MCC

Quote:

RICHARD I need to change porta4 hwpw to another port i tried ccp3con and ccpr3l changed the ccptmrs0 but nothing works I have something else on a4 on the boards im using

if you need porta.4 for another purpose then you cannot use CCP5

post the code you have tried
- 25th June 2025, 18:50
l_gaminde

Re: Hwpw

first question how do you get the code box to post into

OK I was able to change the port from port a4 to port b5 now I need to figure out this

CCP4CON = $0C ; PWM MODE + DUTY LSB 2 BITS ' PORT B0
CCPR4L =%110010 ; DUTY MSB 8 BITS ' $32

it does not seem to be very straight forward I will look at the posts you sent yesterday and see if I'm able to do the math, shifting and what ever else it takes.
I did change the numbering to BIN so when looking in the manual I could line things up with the proper bits (don't get mad)

Code:

#CONFIG ERRORLEVEL -306 ; turn off crossing page boundary message CONFIG FOSC = INTIO67 CONFIG PLLCFG = ON CONFIG PRICLKEN = ON CONFIG FCMEN = OFF CONFIG IESO = OFF CONFIG PWRTEN = ON CONFIG BOREN = SBORDIS CONFIG BORV = 190 CONFIG WDTEN = ON CONFIG WDTPS = 32768 CONFIG CCP2MX = PORTC1 CONFIG PBADEN = OFF CONFIG CCP3MX = PORTB5 CONFIG T3CMX = PORTC0 CONFIG HFOFST = ON CONFIG P2BMX = PORTB5 CONFIG MCLRE = EXTMCLR CONFIG STVREN = ON CONFIG LVP = OFF CONFIG XINST = OFF CONFIG DEBUG = OFF CONFIG CP0 = OFF CONFIG CP1 = OFF CONFIG CP2 = OFF CONFIG CP3 = OFF CONFIG CPB = OFF CONFIG CPD = OFF CONFIG WRT0 = OFF CONFIG WRT1 = OFF CONFIG WRT2 = OFF CONFIG WRT3 = OFF CONFIG WRTC = OFF CONFIG WRTB = OFF CONFIG WRTD = OFF CONFIG EBTR0 = OFF CONFIG EBTR1 = OFF CONFIG EBTR2 = OFF CONFIG EBTR3 = OFF CONFIG EBTRB = OFF #ENDCONFIG DEFINE OSC 64 ANSELB=0 ANSELC=0 ANSELA=0 trisa = %11011111 trisb = %11011110 trisc = %11111001 OSCCON = %1110000 ; $70 OSCTUNE.6 = 1 T2CON = %0110 ; PRESCALE 16 TMR ON PORT B0 6 T4CON = %0110 ; PRESCALE 16 TMR ON PORT B5 6 T6CON = %0110 ; PRESCALE 16 TMR ON PORT C2 6 PR2 = %1100011 ; 10 KHZ PORT B0 $63 PR4 = %1001111 ; 12.5 KHZ PORT B5 $4F PR6 = %1111100 ; 8 KHZ PORT C2 $7C CCP4CON = $0C ; PWM MODE + DUTY LSB 2 BITS ' PORT B0 CCPR4L =%110010 ; DUTY MSB 8 BITS ' $32 CCP3CON = $0C ; PWM MODE + DUTY LSB 2 BITS ' PORT B5 CCPR3L = %10111 ; DUTY MSB 8 BITS ' $27 CCP1CON = $0C ; PWM MODE + DUTY LSB 2 BITS ' PORT C2 CCPR1L = %111110 ; DUTY MSB 8 BITS ' $3E CCPTMRS1 = %00 : TIMER2 = CCP4, ' TIMER4 CCP5 (USED WITH BELOW) CCPTMRS0 = %1011010 ; TIMER6 = CCP1, TIMER4 = CCP3
- 26th June 2025, 02:27
richard

Re: Hwpw

Quote:

first question how do you get the code box to post into

https://www.picbasic.co.uk/forum/showthread.php/19594

Quote:

I did change the numbering to BIN so when looking in the manual I could line things up with the proper bits

it can be informative for some registers for most its just unnecessary clutter

its certainly not helped you get this correct

CCPTMRS0 = %1011010 ; TIMER6 = CCP1, TIMER4 = CCP3

setting C2TSEL<1:0>: CCP2 Timer Selection bits to %11 "reserved" is not a good practice
CCPTMRS0 = %01000010 ; TIMER6 = CCP1, TIMER4 = CCP3 is preferable
- 26th June 2025, 03:55
l_gaminde

Re: Hwpw

Yes the 11 i wasn't sure how to deal with it. So I put it in there if it didn't work. I would have pulled it right out, but it did work in this case. Remember, it's been 15 years since I've done any programming. I wasn't sure how to deal with some of this. So what button do you use to put code in to the forum messages.
- 26th June 2025, 04:00
l_gaminde

Re: Hwpw

Nevermind, I found it a pound tag.
- 27th June 2025, 01:29
l_gaminde

Re: Hwpw

Where can I get this program

mister e's pic multi-calc
- 27th June 2025, 01:44
richard

Re: Hwpw

Quote:

Originally Posted by richard

https://www.picbasic.co.uk/forum/showthread.php/4994

Last post zip attachment