// PIC16F690 in C - Versione 0.2c - Dicembre 2009
// Copyright (c) 2009, VincenzoV.net
// Creative Commons | Attribuzione-Condividi allo stesso modo 3.0 Unported.
// Creative Commons | Attribution-Share Alike 3.0 Unported
// https://www.vincenzov.net/tutorial/elettronica-di-base/PIC16F690

#include <htc.h>

#define _XTAL_FREQ 8000000 // Used from delay macro

__CONFIG(INTIO &       // Use internal clock
         WDTDIS &      // Disable watchdog
         PWRTEN &      // Delay after power on enabled
         MCLRDIS &     // Internal External Switch Over Mode Disable
         UNPROTECT &   // Disable memory protection
         BORDIS &      // Disable reset on low volage
         IESODIS &     // Internal External Switch Over Mode Disable
         FCMDIS);      // Disable Fail clock monitoring

 

void main(void)
{ 
  OSCCON=0x70;         // x111 0000 - 8 Mhz internal clock 
  TRISC = 0x00;	       // Set PORTC as Output 
  // TRISA = 0xFF;     // Set PORTA as input (RA3 is always input if MCLR disabled)
 
  ANSEL = 0;           // Set as Digital I/O
  ANSELH = 0;          // Set as Digital I/O
  
  
  for(;;)
 { 
    // while (RA3);    // Loop if pin 3 of PORTA is 1 (SW1 not pressed)
      
    PORTC = 0x01;      // xxxx 0001 - Turn On Port RC0
    __delay_ms(98);    // Delay 98 ms
    
    PORTC = 0x02;      // xxxx 0010 - Turn On Port RC1
    __delay_ms(98);    // Delay 98 ms
       
    PORTC = 0x04;      // xxxx 0100 - Turn On Port RC2
    __delay_ms(98);    // Delay 98 ms
       
    PORTC = 0x08;      // xxxx 1000  - Turn On Port RC3
    __delay_ms(98);    // Delay 98 ms
       
    PORTC = 0x04;      // xxxx 0100 - Turn On Port RC2 
    __delay_ms(98);    // Delay 98 ms
    
    PORTC = 0x02;      // xxxx  0010 - Turn On Port RC1
    __delay_ms(98);    // Delay 98 ms 
  }
}