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[PIC] Interface LCD between pic microcontroller and mikroC

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sumonpic10

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Hi, I try to program the pic microcontroller according my controller. There I used 3 button for enter the program menu, change the program number. When press the prog_button then enter the program. And press forw_button the change the number also. But when i press the revs_button then came random display. Below my code.. I don't understand where is mistake. Please help me


Best regard
Sumon Ahmed 



Code C - [expand]
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// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections
 
 
sbit prog_button      at portc.f0;  // button interface with portC
sbit enter_button     at portc.f1;
sbit forw_button      at portc.f2;
sbit revs_button      at portc.f3;
 
 
 
 
 
char main_1[] = "MAIN MENU";      // string character
char prog_1[] = "1 program";
char prog_2[] = "2 program";
char prog_3[] = "3 program";
char blank_1[] = "          ";    // blank display
 
 
int prog_code = 0;        // variable declared
 
 
 
 
// program function //////
 
 
prog_init()
 
{
 
   while(prog_code==1)
 
   {
    
    if(forw_button == 1) && (prog_code ==1)     // if enter button press /////
 
    {
      
      Lcd_Cmd(_LCD_CLEAR);  // Clear display
      prog_code = 2;        // prog_code value changed
      delay_ms(200);    // delay time 200ms
 
    }
 
 
 
 
 
    Lcd_Out(1,1,main_1);
    Lcd_Out(2,1,prog_1);
    Lcd_Out(3,1,prog_2);
    Lcd_Out(4,1,prog_3);
    delay_ms(300);
    Lcd_Out(1,1,main_1);
    Lcd_Out(2,1,blank_1);
    Lcd_Out(3,1,prog_2);
    Lcd_Out(4,1,prog_3);
    delay_ms(300);
 
 
 
 
 
 
   }
 
 
    
    while(prog_code==2)
 
   {
    
    if(forw_button == 1) && (prog_code ==2)     // if enter button press /////
 
    {
      
      Lcd_Cmd(_LCD_CLEAR);  // Clear display
      prog_code = 3;        // prog_code value changed
      delay_ms(200);    // delay time 200ms
 
    }
 
 
    if(revs_button == 1) && (prog_code ==2)     // if enter button press /////
 
    {
      
      Lcd_Cmd(_LCD_CLEAR);  // Clear display
      prog_code = 1;        // prog_code value changed
      delay_ms(200);    // delay time 200ms
 
    }
 
 
 
 
 
    Lcd_Out(1,1,main_1);
    Lcd_Out(2,1,prog_1);
    Lcd_Out(3,1,prog_2);
    Lcd_Out(4,1,prog_3);
    delay_ms(300);
    Lcd_Out(1,1,main_1);
    Lcd_Out(2,1,prog_1);
    Lcd_Out(3,1,blank_1);
    Lcd_Out(4,1,prog_3);
    delay_ms(300);
 
 
 
 
 
 
   }
 
 
 
    while(prog_code==3)
 
   {
    
    if(forw_button == 1) && (prog_code ==3)     // if enter button press /////
 
    {
      
      Lcd_Cmd(_LCD_CLEAR);  // Clear display
      prog_code = 0;    // prog_code value changed
      delay_ms(200);    // delay time 200ms
 
    }
 
 
    if(revs_button == 1) && (prog_code ==3)     // if enter button press /////
 
    {
      
      Lcd_Cmd(_LCD_CLEAR);  // Clear display
      prog_code = 2;        // prog_code value changed
      delay_ms(200);    // delay time 200ms
 
    }
 
 
 
 
 
    Lcd_Out(1,1,main_1);
    Lcd_Out(2,1,prog_1);
    Lcd_Out(3,1,prog_2);
    Lcd_Out(4,1,prog_3);
    delay_ms(300);
    Lcd_Out(1,1,main_1);
    Lcd_Out(2,1,prog_1);
    Lcd_Out(3,1,prog_2);
    Lcd_Out(4,1,blank_1);
    delay_ms(300);
 
 
 
 
 
 
   }
 
 
 
 
 
 
 
}
 
 
 
 
 
 
 
 
 
void main()
{
    TRISB = 0;
    PORTB = 0xFF;
    ANSEL = 0; // Configure AN pins as digital I/O
    ANSELH = 0;
 
    Lcd_Init(); // Initialize LCD
    Lcd_Cmd(_LCD_CLEAR); // Clear display
    Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
 
 
    while(1)
 
    {
 
      
    Lcd_Out(1,1," programmable");
    Lcd_Out(2,1," digital controller ");
 
 
 
 
 
        if(prog_button == 1)      // if button is press
 
        {
           Lcd_Cmd(_LCD_CLEAR);     // Clear display
           prog_init();     // call a function
           prog_code = 1;       // prog_code value changed
           delay_ms(200);   // delay time 200ms
        }
 
 
 
}
 
Last edited by a moderator:

MikroC has some strange quirks but from your description, it hasn't stored the text correctly, try changing the lines to:
Code: 
char *main_1 = "MAIN MENU"; // string character
char *prog_1 = "1 program";
char *prog_2 = "2 program";
char *prog_3 = "3 program";
char *blank_1 = " "; // blank display

I can't confirm if that will fix it because I don't use that compiler.

Brian.
 

hello,



for me

Code: 
char main_1[] = "MAIN MENU"; // string character
char prog_1[] = "1 program";
char prog_2[] = "2 program";
char prog_3[] = "3 program";
char blank_1[] = " ";	// blank display

seem correct with MikroC

What MCU are you using ?

Waht inside the message Windows ?
IPR_Bit problems can occurs wit PIC16F
because use of a lot of RAM
better to use constant to define your messages ..
 
Dear All, I used pic16f887 mcu & 20x4 lcd. . And mikroC compiler build without any errors. But problem facing when I simulate in proteus 8.6 or practical in circuit.

Thanks
 

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