CCS de 2 pinle LCD yi çalıştırmak

[zafzaf82]

Selam Arkadaşlar bi sitede buldugum LCD driver'i sizinle paylaşmak istedim.

#if defined(__PCM__)
#include <16F628A.h>


#FUSES NOWDT                 	//No Watch Dog Timer
#FUSES INTRC                 	//Internal RC Osc
#FUSES NOPUT                 	//No Power Up Timer
#FUSES NOPROTECT             	//Code not protected from reading
#FUSES NOBROWNOUT            	//No brownout reset
#FUSES NOMCLR                	//Master Clear pin used for I/O
#FUSES NOLVP                 	//No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD               	//No EE protection


#use delay(clock=4000000,RESTART_WDT)
#include <LCDHG.C>

void main()
{
   setup_oscillator(4000000);

   lcd_init(); // LCd ile haberleş

   for(;;)
   {
   lcd_gotoxy(1,1);
   lcd_putc("DENEME\n");
   lcd_putc("LCD CALISIYOOOOO");
   DELAY_MS(100);

   }
}

Yukarıda yazdığım programla aşagıdaki driveri denedim ve çalıştı.

//// LCDHG.C
//// Driver for common LCD modules
////
//// lcd_init() Must be called before any other function. ////
//// lcd_putc(c) Will display c on the next position of the LCD.
//// The following have special meaning:
//// \f Clear display
//// \n Go to start of second line
//// \b Move back one position
////
//// lcd_gotoxy(x,y) Set write position on LCD (upper left is 1,1)
////
/*
I adapt CCS driver for use the 2wire serial lcd interface.

I found this interface very useful for lcd when a 1 wire serial lcd is not practical due use of INTRC osc configuration. This interface has no timings problem when used with internal osc!.

Just define in the main c module the 2 pins LCDCLK, LCDDAT..

I test this code in 16f84, 16f877, 16f628 with rc / intrc at 4mhz.
For 18fx52 20-40mhz operation, delays in lcd_es() is needed.

Original idea from Myke Predko.
For the schematics please see http://www.rentron.com/Myke1.htm .

*/

#ifndef LCDCLK
#define LCDCLK PIN_A2
#endif

#ifndef LCDDAT
#define LCDDAT PIN_A3
#endif

#define DATA1 output_high(LCDDAT)
#define DATA0 output_low(LCDDAT)

void lcd_Es()
{
output_high(LCDDAT);
//delay_us(200); //only in high mhz
output_low(LCDDAT);
}

void lcd_Clk()
{
output_high(LCDCLK);
output_low(LCDCLK);

}


void lcd_Send_Nibble( char nibble, int1 rs)
{
int8 i;

DATA0; // clear output
for (i=0; i<6; i++) lcd_Clk();

DATA1; // Output the "AND" Value
lcd_Clk();

IF (rs==1) DATA1; // Output the RS Bit Value
ELSE DATA0;
lcd_Clk();

for (i = 0; i<4; i++) // Output the Nybble
{
if (nibble & 0x08) DATA1; // Output the High Order Bit
else DATA0;
lcd_Clk(); // Strobe the Clock
nibble<<=1; // Shift up Nybble for Next Byte
}
lcd_Es(); // Toggle the "E" Clock Bit
}


void lcd_send_byte( int n , int1 rs)
{
lcd_send_nibble(n >> 4 , rs);
lcd_send_nibble(n & 0xf, rs);
}


void lcd_init( void)
{
lcd_send_nibble(0x03,0);
delay_ms(5);
lcd_es();
delay_us(160);
lcd_es();
delay_us(160);
lcd_send_nibble(0x02,0);
delay_us(160);
lcd_send_byte(0x28,0);
lcd_send_byte(0x08,0);
lcd_send_byte(0x01,0);
delay_ms(5);
lcd_send_byte(0x06,0);
lcd_send_byte(0x0C,0);
}


void lcd_gotoxy( int x, int y)
{
BYTE address;
if (y!=1) address=0x40;
else address=0;
address+=x-1;
lcd_send_byte(0x80|address,0);
}


void lcd_putc( char c)
{
switch (c)
{
case '\f' : lcd_send_byte(1,0); delay_ms(5); break;
case '\n' : lcd_gotoxy(1,2); break;
case '\b' : lcd_send_byte(0x10,0); break;
default : lcd_send_byte(c,1); break;
}
}

http://rapidshare.de/files/31523197/2_wire_lcd_deneme.rar.html

[fuko88]

2 bacak gerçekten de harika. Bende deneyeceğim bunu. Eğer çalışıyorsa/çalıştırabilirsem çok güzel olur gerçekten.
Bi yan etkisi oluyor mu peki? Gecikme vb. ?

[zafzaf82]

tabiki biraz gecikme oluyor. Altprograma bakarsan görebilirsin.

[tufantuncer]

dosyayı indirdim fakat bendeki proteusla açamadım
acaba resmi upload edebilirmisiniz devreyi gorup denemek istiyorum da

[tufantuncer]

birde bende pic dem2 deneme boardı var bu boardta 16x2 lcd var, pic16f648a pic te var, yanlız henuz uygulama geliştiremedim. ccs c compiler kullanmak istiyorum,c de yazdığım kodda lcd yi surerken yukarıdaki gibi    
  lcd_gotoxy(1,1);
  lcd_putc("DENEME\n");
  lcd_putc("LCD CALISIYOOOOO");
  DELAY_MS(100);
gibi komutlar kullanıp, denemeler yapmak istiyorum, bunun için gerekli header dosyaları nasıl bulabilirim, birde pinlerin nereye bağlandığı kendim belirlemek istiyorum. pic16f648A kullanıyorum bide o var. 4 pini kullanabildiğim veya 8pinde olabilir denemek için lcd driver kodu nereden bulabilirmiyim , yardımcı olursanız sevinirim

[zafzaf82]

bağlantıyı bu şekilde yapabilirsin.

[zafzaf82]

@tufantuncer aşagıdaki header dosyasını kullanarak LCD yi pic'in istediğin pinine bağlayabilirsin.

// 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_D0
#define LCD_DB5   PIN_D1
#define LCD_DB6   PIN_D2
#define LCD_DB7   PIN_D3

#define LCD_E     PIN_A1
#define LCD_RS    PIN_A3
#define LCD_RW    PIN_A2

// 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

istediğin pine LCD yi bağlamak için

#define LCD_DB4   PIN_D0
#define LCD_DB5   PIN_D1
#define LCD_DB6   PIN_D2
#define LCD_DB7   PIN_D3

#define LCD_E     PIN_A1
#define LCD_RS    PIN_A3
#define LCD_RW    PIN_A2

kodlarını değiştrimen yeterlidir.

[tufantuncer]

dostum yardımların için teşekkür ederim, ama ben gene çalıştıramadım pic c de compile ederken
int8 const LCD_INIT_STRING[4] =    bu komutta hata veriyor, onune #device yazmalısın diyor, yazıyorum bu seferde farklı hatalar ortaya cıkıyor. acaba başka bir header dosyası felan mı gereki? int8 tipinin içinde tanımlandığı?

[zafzaf82]

yukarıda verdiğim heddar dosyasını kopyala flex_lcd.c diye programın main dosyasının bulundugu klasöre kaydet.
Sonra şu programı yaz çalışacaktır.

#if defined(__PCM__)
#include <16F84A.h>


#FUSES NOWDT                    //No Watch Dog Timer
#FUSES NOPUT                    //No Power Up Timer
#FUSES NOPROTECT                //Code not protected from reading
#FUSES NOCPD                  //No EE protection


#use delay(clock=4000000,RESTART_WDT)
#include <flex_lcd.c>

void main()
{

   lcd_init(); // LCd ile haberleş

   while(TRUE)
   {
   lcd_gotoxy(1,1);
   printf(lcd_putc,"INSALLAH");
   lcd_gotoxy(1,2);
   printf(lcd_putc,"LCD CALISICAK :)");
   delay_ms(100);
   }
}

tabi lcd nin pinlerini 16f84 e görede ayarlamayı unutma.

#define LCD_DB4   PIN_D0
#define LCD_DB5   PIN_B1
#define LCD_DB6   PIN_B2
#define LCD_DB7   PIN_B3

#define LCD_E     PIN_A1
#define LCD_RS    PIN_A3
#define LCD_RW    PIN_A2

Kolay gelsin....