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[SOLVED] Problem in mikroC PRO for PIC coding for PIC16F688

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shahbaz.ele

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Dear all I am facing aproblem in coding of PIC16F688
here is my code

Code:
// LCD module connections
sbit LCD_RS at RC4_bit;        
sbit LCD_EN at RC5_bit;        
sbit LCD_D4 at RC0_bit;
sbit LCD_D5 at RC1_bit;        
sbit LCD_D6 at RC2_bit;        
sbit LCD_D7 at RC3_bit;
sbit LCD_RS_Direction at TRISC4_bit;        
sbit LCD_EN_Direction at TRISC5_bit;
sbit LCD_D4_Direction at TRISC0_bit;        
sbit LCD_D5_Direction at TRISC1_bit;
sbit LCD_D6_Direction at TRISC2_bit;        
sbit LCD_D7_Direction at TRISC3_bit;
// End LCD module connections
// Back Light Switch connected to RA1
sbit BackLight at RA1_bit;
// Define Messages
char message0[] = "LCD Initialized";        
char message1[] = "Shahbaz Khan";
char message2[] = "RA4";
char message3[] = "RA5";
char message4[] = "   SCANING...   ";

// ISR for LCD Backlight
void interrupt(void){
  if (INTCON.RAIF == 1)          // Check if INTF flag is set
     {
     if (RA4 == 1)
     {
      Lcd_Cmd(_LCD_CLEAR);               // CLEAR display
      //BackLight = 1;
      Lcd_Out(1,1,message2);
      Delay_ms(5);
     }
     else if (RA5 == 1)
     {
      Lcd_Cmd(_LCD_CLEAR);               // CLEAR display
      //BackLight = 1;
      Lcd_Out(1,1,message3);
      Delay_ms(5);
     }
     else
     {
      //Lcd_Cmd(_LCD_CLEAR);               // CLEAR display
      //BackLight = 1;
      //Lcd_Out(1,1,message4);
      //Delay_ms(3);
     }//Delay_ms(10) ;
     INTCON.RAIF = 0;       // Clear interrupt flag before exiting ISR
     }
}
void main() {
  TRISC = 0x00 ;
  TRISA = 0b00111100; //  RA2, RA3, RA4, RA5 Inputs, Rest O/P's
  ANSEL =   0b00000000;
  PORTA =   0b00000000;            //  Start with Everything Low
  PORTC =   0b00000000;            //  Start with Everything Low
  CMCON0 =  0b00000111;
  Lcd_Init();                        // Initialize LCD
  Lcd_Cmd(_LCD_CLEAR);               // CLEAR display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  BackLight = 1;
  Lcd_Out(1,1,message0);
  Delay_ms(5);
  Lcd_Cmd(_LCD_CLEAR);               // CLEAR display
  Lcd_Out(1,1,message1);             // Write message1 in 1st row
  // Interrupt Setup
     //IOCA4 = 1;             //Input Change Enable RA4
    //IOCA5 = 1;             //Input Change Enable RA5
    IOCA = 0x30;
    INTCON.RAIF = 0;     // Clear interrupt flag prior to enable
    INTCON.RAIE = 1;     // enable Input Change interrupt
    //INTCON.INTF = 0;     // Clear interrupt flag prior to enable
    //INTCON.INTE = 1;     // enable INT interrupt
    INTCON.GIE  = 1;     // enable Global interrupts
 do {
 } while(1);
}


My first problem is that I do not know what would be name of PortA change intrrupt.
the intrrupt routine wrritten in code is External intrrupt.

Secondly I have short space for coding in ISR. how to use goto command.
Thanks in advance.

---------- Post added at 11:43 ---------- Previous post was at 11:41 ----------

in Second When I uncomment any one line written under else, it gives ROM error

---------- Post added at 12:31 ---------- Previous post was at 11:43 ----------

7 433 Not enough RAM for call stack __Lib_Delays.c
 

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