flexy lcd driver

[aliveli]

Arkadaşlar aşağıya verdiğim kodları notepad'e yapıştırıp flex_lcd.c olarak C:\Program Files\PICC\Drivers kaydedin. Bu 2x16 lcd driver'ı sayesinde Pic'inizin istediğiniz bacağını lcd'nin istediğiniz bacağına bağlayabilirsiniz
Not:Lcd yazma vs komutlar aynıdır.

#define LCD_DB4   PIN_c5  
#define LCD_DB5   PIN_c4  
#define LCD_DB6   PIN_d3  
#define LCD_DB7   PIN_d2  

#define LCD_E     PIN_c6  
#define LCD_RS    PIN_d4  
#define LCD_RW    PIN_c7  



#define LCD_CGRAM_ADDR 0x40           
#define LCD_DDRAM_ADDR 0x80           
#define USE_LCD_RW   1

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

#define lcd_type 2        
#define lcd_line_two 0x40 

#define LCD_CHAR_1 0x01 
#define LCD_CHAR_2 0x02 
#define LCD_CHAR_3 0x03 
#define LCD_CHAR_4 0x04 
#define LCD_CHAR_5 0x05 
#define LCD_CHAR_6 0x06 
#define LCD_CHAR_7 0x07 
#define LCD_CHAR_8 0x08 

int8 const LCD_INIT_STRING[4] =
{
 0x20 | (lcd_type << 2), 
 0xc,                    
 1,                      
 6                       
 };


//-------------------------------------
void lcd_send_nibble(int8 nibble)
{
 output_bit(LCD_DB4, !!(nibble & 1));
 output_bit(LCD_DB5, !!(nibble & 2));
 output_bit(LCD_DB6, !!(nibble & 4));
 output_bit(LCD_DB7, !!(nibble & 8));

 delay_cycles(1);
 output_high(LCD_E);
 delay_us(2);
 output_low(LCD_E);
}


#ifdef USE_LCD_RW
int8 lcd_read_nibble(void)
{
int8 retval;
#bit retval_0 = retval.0
#bit retval_1 = retval.1
#bit retval_2 = retval.2
#bit retval_3 = retval.3

retval = 0;

output_high(LCD_E);
delay_cycles(1);

retval_0 = input(LCD_DB4);
retval_1 = input(LCD_DB5);
retval_2 = input(LCD_DB6);
retval_3 = input(LCD_DB7);

output_low(LCD_E);

return(retval);
}
#endif

//---------------------------------------

#ifdef USE_LCD_RW
int8 lcd_read_byte(void)
{
int8 low;
int8 high;

output_high(LCD_RW);
delay_cycles(1);

high = lcd_read_nibble();

low = lcd_read_nibble();

return( (high<<4) | low);
}
#endif

//----------------------------------------
void lcd_send_byte(int8 address, int8 n)
{
output_low(LCD_RS);

#ifdef USE_LCD_RW
while(bit_test(lcd_read_byte(),7)) ;
#else
delay_us(60);
#endif

if(address)
   output_high(LCD_RS);
else
   output_low(LCD_RS);

 delay_cycles(1);

#ifdef USE_LCD_RW
output_low(LCD_RW);
delay_cycles(1);
#endif

output_low(LCD_E);

lcd_send_nibble(n >> 4);
lcd_send_nibble(n & 0xf);
}

void lcd_setcursor_vb(short visible, short blink) {
  lcd_send_byte(0, 0xC|(visible<<1)|blink);
}

//----------------------------
void lcd_init(void)
{
int8 i;

output_low(LCD_RS);

#ifdef USE_LCD_RW
output_low(LCD_RW);
#endif

output_low(LCD_E);

delay_ms(15);

for(i=0 ;i < 3; i++)
   {
    lcd_send_nibble(0x03);
    delay_ms(5);
   }

lcd_send_nibble(0x02);

for(i=0; i < sizeof(LCD_INIT_STRING); i++)
   {
    lcd_send_byte(0, LCD_INIT_STRING[i]);

    #ifndef USE_LCD_RW
    delay_ms(5);
    #endif
   }

}

//----------------------------

void lcd_gotoxy(int8 x, int8 y)
{
int8 address;

if(y != 1)
   address = lcd_line_two;
else
   address=0;

address += x-1;
lcd_send_byte(0, 0x80 | address);
}

//-----------------------------
void lcd_putc(char c)
{
 switch(c)
   {
    case '\f':
      lcd_send_byte(0,1);
      delay_ms(2);
      break;

    case '\n':
       lcd_gotoxy(1,2);
       break;

    case '\b':
       lcd_send_byte(0,0x10);
       break;
    default:
       lcd_send_byte(1,c);
       break;
   }
}

//------------------------------
#ifdef USE_LCD_RW
char lcd_getc(int8 x, int8 y)
{
char value;

lcd_gotoxy(x,y);

while(bit_test(lcd_read_byte(),7));

output_high(LCD_RS);
value = lcd_read_byte();
output_low(lcd_RS);

return(value);
}
#endif