LCD 20x4 ( 4 bits ) lib

I'm sure the question pin R / W LCD . I Realized que he is on a pin , but he is in the right GND ? I've done some lcd connections in Proteus and it was so .
Got it , thanks for the tip .

I'm sure the question pin R / W LCD . I Realized que he is on a pin , but he is in the right GND ? I've done some lcd connections in Proteus and it was so .
Got it , thanks for the tip .

Jonatan souza.
it seems that your code is changed and is different from what was on my mind.use these codes.

#ifndef __PORTLCD_H
#define __PORTLCD_H

#define USE_FIO         1

#if USE_FIO
#define IODIR_LCD    FIO0DIR
#define IOSET_LCD    FIO0SET
#define IOCLR_LCD    FIO0CLR
#define IOPIN_LCD    FIO0PIN
#else
#define IODIR_LCD    IODIR0
#define IOSET_LCD    IOSET0
#define IOCLR_LCD    IOCLR0
#define IOPIN_LCD    IOPIN0
#endif

/* LCD IO definitions */
#define LCD_E                   ( 1 << 26 )                       /* Enable control pin                */
#define LCD_RW                  ( 1 << 25 )                       /* Read/Write control pin            */
#define LCD_RS                  ( 1 << 24 )                       /* Data/Instruction control          */
#define LCD_CTRL                ( LCD_E | LCD_RW | LCD_RS )       /* Control lines mask                */
#define LCD_DATA                ( 0x0f << 27 )
#define LCD_DATA_START  27                    /* Data lines mask                   */

extern void LCD_init(void);
extern void delay (DWORD cnt) ;
extern void LCD_load(BYTE *fp, DWORD cnt);
extern void LCD_gotoxy(DWORD x, DWORD y);
extern void LCD_cls(void);
extern void LCD_cur_off(void);
extern void LCD_on(void);
extern void LCD_putc(BYTE c);
extern void LCD_puts(BYTE *sp);
extern void LCD_bargraph(DWORD val, DWORD size);
extern void LCD_cur_blink( void );

#endif /* end __PORTLCD_H */

you should just change the Port number and pins according to your project.
and Source code for 20 character length LCDs.

/******************************************************************************
void LCD_init( void )
{
   /* Initialize the ST7066 LCD controller to 4-bit mode. */
#if USE_FIO
        SCS |= 0x00000001;      /* set GPIOx to use Fast I/O */
#endif
   IODIR_LCD |= LCD_CTRL | LCD_DATA;
   IOCLR_LCD  = LCD_RW   | LCD_RS   | LCD_DATA;

   lcd_write_4bit(0x3);                /* Select 4-bit interface            */
   delay (10);
   lcd_write_4bit(0x3);
   delay (10);
   lcd_write_4bit(0x3);
   lcd_write_4bit(0x2);

   lcd_write_cmd(0x28);                /* 2 lines, 5x8 character matrix     */
   lcd_write_cmd(0x0e);                /* Display ctrl:Disp/Curs/Blnk=ON    */
   lcd_write_cmd(0x06);                /* Entry mode: Move right, no shift  */

   LCD_load( (BYTE *)&UserFont, sizeof (UserFont) );
   LCD_cls();
   return;
}

/******************************************************************************
void LCD_gotoxy( DWORD x, DWORD y )
{
   /* Set cursor position on LCD display. Left corner: 1,1, right: 16,2 */
   DWORD c;

   c = x;
   if (y)
   {
      c |= 0x40;
   }
   lcd_write_cmd (c | 0x80);
   lcd_ptr = y*20 + x;
   return;
}

/******************************************************************************
void LCD_putc( BYTE c )
{
   /* Print a character to LCD at current cursor position. */
   if (lcd_ptr == 20)
   {
      lcd_write_cmd (0xc0);
   }
   lcd_write_data(c);
   lcd_ptr++;
   return;
}


/*****************************************************************************
**                            End Of File
******************************************************************************/

I'm using the same code , but I'm getting messages such as: "Controller received command whilst busy" and then another " Attempted to read controller date whilst busy" . What is it?

proteus is not a reliable simulator.test your code on a real hardware. I used this module in some of my projects and is working well. try more.