Wake up LCD !!

[COLOR="Red"][B];	processor  PIC16f870
;	processor  PIC16F88
[/B]
[/COLOR]	ifdef	__16F870
	include	P16f870.inc
#DEFINE TMR0IF	T0IF
	else
	include	P16F88.inc
	endif

	errorlevel -302,-305	; not reporting bank<>0, dest=file

#DEFINE FALSE 0
#DEFINE movfw ERROR movwf?

	ifdef	__16F870
 __config _BODEN_OFF&_WDT_OFF&_LVP_OFF&_PWRTE_ON&_HS_OSC
	else   ; 16F88
 __config _CONFIG1,_BODEN_OFF&_WDT_OFF&_LVP_OFF&_MCLR_OFF&_PWRTE_ON&_INTRC_IO
	endif

; I/O pin assignments

	ifdef	__16F870

#DEFINE	PGBTN	PORTC,0	; page button
#DEFINE	HDBTN	PORTC,1	; hold button
#DEFINE	BLDBTN	PORTC,3	; blades button

#DEFINE	RPMIN	PORTC,2	; rpm input

#DEFINE LCD_D7  PORTB,0	; \
#DEFINE	LCD_D6  PORTB,1	; |
#DEFINE LCD_D5  PORTB,2	; | LCD panel
#DEFINE LCD_D4  PORTB,3	; |
#DEFINE LCD_E   PORTB,4	; |
#DEFINE LCD_RS  PORTB,5	; /


	else    ; 16f88

#DEFINE	PGBTN	PORTB,6	; page button
#DEFINE	HDBTN	PORTB,7	; hold button
#DEFINE	BLDBTN	PORTA,7	; blades button

#DEFINE	RPM_IN	PORTB,0	; rpm input

#DEFINE LCD_D7  PORTA,4	; \
#DEFINE	LCD_D6  PORTB,1	; |
#DEFINE LCD_D5  PORTB,2	; | LCD panel
#DEFINE LCD_D4  PORTB,3	; |
#DEFINE LCD_E   PORTB,4	; |
#DEFINE LCD_RS  PORTB,5	; /

	endif

----------------------------------------------------------------------
Debug build of project `D:\Watt Meter (desired design)\wattmeter.mcp' started.
Preprocessor symbol `__DEBUG' is defined.
Fri Jan 23 18:18:22 2009
----------------------------------------------------------------------
Clean: Deleting intermediary and output files.
Clean: Deleted file "D:\Watt Meter (desired design)\wattmeter.err".
Clean: Deleted file "D:\Watt Meter (desired design)\wattmeter.cod".
Clean: Deleted file "D:\Watt Meter (desired design)\wattmeter.hex".
Clean: Deleted file "D:\Watt Meter (desired design)\wattmeter.lst".
Clean: Deleted file "D:\Watt Meter (desired design)\wattmeter.mcs".
Clean: Done.
Executing: "C:\Program Files\Microchip\MPASM Suite\MPASMWIN.exe" /q /p16F88 "wattmeter.asm" /l"wattmeter.lst" /e"wattmeter.err" /d__DEBUG=1
Loaded D:\Watt Meter (desired design)\wattmeter.cod.
----------------------------------------------------------------------
Debug build of project `D:\Watt Meter (desired design)\wattmeter.mcp' succeeded.
Preprocessor symbol `__DEBUG' is defined.
Fri Jan 23 18:18:24 2009
----------------------------------------------------------------------
BUILD SUCCEEDED

#include <16F88.h>
#fuses HS,NOWDT,PUT,NOLVP
#use delay(clock=20000000)
#include "flex_lcd.c"
   
//==========================
void main()
{
lcd_init();  // Always call this first.

lcd_putc("\fHello World\n");
lcd_putc("Line Number 2");

while(1);
}

// flex_lcd.c

// These pins are for the Microchip PicDem2-Plus board,
// which is what I used to test the driver.  Change these
// pins to fit your own board.

#define LCD_DB4   PIN_B0
#define LCD_DB5   PIN_B1
#define LCD_DB6   PIN_B2
#define LCD_DB7   PIN_B3

#define LCD_RS    PIN_B4
#define LCD_RW    PIN_B5
#define LCD_E     PIN_B6 

// If you only want a 6-pin interface to your LCD, then
// connect the R/W pin on the LCD to ground, and comment
// out the following line.

#define USE_LCD_RW   1     

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

#define lcd_type 2        // 0=5x7, 1=5x10, 2=2 lines
#define lcd_line_two 0x40 // LCD RAM address for the 2nd line


int8 const LCD_INIT_STRING[4] =
{
 0x20 | (lcd_type << 2), // Func set: 4-bit, 2 lines, 5x8 dots
 0xc,                    // Display on
 1,                      // Clear display
 6                       // Increment cursor
 };
                             

//-------------------------------------
void lcd_send_nibble(int8 nibble)
{
// Note:  !! converts an integer expression
// to a boolean (1 or 0).
 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);
}

//-----------------------------------
// This sub-routine is only called by lcd_read_byte().
// It's not a stand-alone routine.  For example, the
// R/W signal is set high by lcd_read_byte() before
// this routine is called.     

#ifdef USE_LCD_RW
int8 lcd_read_nibble(void)
{
int8 retval;
// Create bit variables so that we can easily set
// individual bits in the retval variable.
#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

//---------------------------------------
// Read a byte from the LCD and return it.

#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

//----------------------------------------
// Send a byte to the LCD.
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_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]);
   
    // If the R/W signal is not used, then
    // the busy bit can't be polled.  One of
    // the init commands takes longer than
    // the hard-coded delay of 60 us, so in
    // that case, lets just do a 5 ms delay
    // after all four of them.
    #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);

// Wait until busy flag is low.
while(bit_test(lcd_read_byte(),7)); 

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

return(value);
}
#endif