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PWM with PIC16F88

 
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PWM with PIC16F88
PostPosted: Fri Jul 17, 2009 7:02 pm     Reply with quote
I’m trying to use the RB3 pin for CCP1 with a 16F88. In order to do this I use “set_pwm2_duty” but it says it’s an Undefined Identifier. It works when I use “set_pwm1_duty” which ,I suppose, sets the duty cycle in pin RB0.
I put the code below.
I would appreciate if someone helps me with that.
Thanks
Code:
Code:
#include <16F88.h>
 
#DEVICE ADC = 10           
#USE DELAY(CLOCK = 4000000) 
#include "fuses16F88.c"     
#include "math.h"           
#include <lcd.c>                 

#BYTE TRISA = 0X85
#BYTE TRISB = 0X86
#BYTE PORTA = 0X05
#BYTE PORTB = 0X06
#BYTE CONFIG1 = 0X2007

void main(void)
{
float valor, duty;
disable_interrupts(GLOBAL);     
PORT_B_PULLUPS(FALSE);           

//Config PWM

bit_clear(CONFIG1,12);             
setup_ccp1(CCP_PWM);             
setup_timer_2(T2_DIV_BY_1, 225, 1);   
TRISB = 0b00;                       
//set_pwm1_duty(0);         

//Config ADC

setup_adc(ADC_CLOCK_INTERNAL|VSS_VDD);     
setup_adc_ports(sAN0);                     
TRISA = 0xFF;                               
set_adc_channel(0);                   
lcd_init();           

while(true)
   {
 
   delay_us(20);
   valor = read_adc();
   duty = (225.0/1024.0)*(valor);
   set_pwm2_duty(duty);             
   
   lcd_putc('\f');               
   lcd_gotoxy(1,1);
   printf(lcd_putc,"%f", valor);
   lcd_gotoxy(1,1);
   delay_ms(100);   
  }
}
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Fri Jul 17, 2009 7:56 pm     Reply with quote
Quote:
In order to do this I use “set_pwm2_duty” but it says it’s an Undefined Identifier

Download the 16F88 data sheet. At the bottom of the first page, it lists
the number of CCP modules in the PIC.
http://ww1.microchip.com/downloads/en/DeviceDoc/30487c.pdf
set_pwm2_duty() is only available if there are 2 or more CCP modules.

To select the pin that is used by CCP1, you need to use one of the
following values in bold in your #fuses statement:
Quote:
// Fuses: LP,XT,HS,EC_IO,NOWDT,WDT,NOPUT,PUT,MCLR,NOMCLR,BROWNOUT
// Fuses: NOBROWNOUT,LVP,NOLVP,CPD,NOCPD,WRT,NOWRT,DEBUG,NODEBUG,CCPB0
// Fuses: CCPB3,PROTECT,NOPROTECT,INTRC,INTRC_IO,RC,RC_IO,FCMEN
// Fuses: NOFCMEN,IESO,NOIESO
reader
Guest
PostPosted: Fri Jul 17, 2009 8:21 pm     Reply with quote
Thanks to you.
Now is working perfectly.
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