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
2 bacak gerçekten de harika. Bende deneyeceğim bunu. Eğer çalışıyorsa/çalıştırabilirsem çok güzel olur gerçekten.
Bi yan etkisi oluyor mu peki? Gecikme vb. ?
tabiki biraz gecikme oluyor. Altprograma bakarsan görebilirsin.
dosyayı indirdim fakat bendeki proteusla açamadım
acaba resmi upload edebilirmisiniz devreyi gorup denemek istiyorum da
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
bağlantıyı bu şekilde yapabilirsin.
(http://www.rentron.com/2wirelcd.jpg)
@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.
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?
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....