Onda senoidal PWM com PIC 16F877A

Código feito em CCS C Compiler

#include <16F877A.h>

#device adc=8

#FUSES NOWDT //No Watch Dog Timer

#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)

#FUSES NOPUT //No Power Up Timer

#FUSES NOPROTECT //Code not protected from reading

#FUSES NODEBUG //No Debug mode for ICD

#FUSES NOBROWNOUT //No brownout reset

#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for

#FUSES NOCPD //No EE protection

#FUSES NOWRT //Program memory not write protected

#use delay(clock = 20MHz)

//============== TABELA COM VALORES DE UMA ONDA SENOIDAL ================//

const unsigned int seno[73] = { 0,0,1,2,3,5,7,9,12,14,18,21,25,29,33,37,41,

 45,50,54,58,62,66,70,74,78,81,85,87,90,92,94,

 96,97,98,99,99,99,98,97,96,94,92,90,87,85,81,

 78,74,70,66,62,58,54,50,45,41,37,33,29,25,21,

 18,14,12,9,7,5,3,2,1,0};

//======================================================================//

unsigned int8 ii = 0, ton;

#int_RTCC

void RTCC_isr(void){

   ii=ii+1; ton = seno[ii];

   set_pwm1_duty(ton);

   if(ii>71)ii=0;

}

void main(){

   setup_adc_ports(NO_ANALOGS);

   setup_adc(ADC_OFF);

   setup_psp(PSP_DISABLED);

   setup_spi(SPI_SS_DISABLED);

   // Programação do Timer 0 - Overflow a cada 819 us

   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_16);

   setup_timer_1(T1_DISABLED);

   // Programação do Timer 2 - usado no PWM

   setup_timer_2(T2_DIV_BY_1,99,1);

   setup_ccp1(CCP_PWM);

   set_pwm1_duty(99); // Ton = 100%

   setup_comparator(NC_NC_NC_NC);

   setup_vref(FALSE);

   enable_interrupts(INT_RTCC);

   enable_interrupts(GLOBAL);

    while(true){

      /*

      ii=ii+1; ton = seno[ii];

      set_pwm1_duty(ton);

      if(ii>71)ii=0;

      delay_ms(1);

      */

   

   }

}