I need sample c programs in keil...

keil samples in c

Hi.. i need sample coding using keilC complier.... am doing project in 89c51....
mainly i need codings in
1.temperatue sensor
2.ADC convertor
3.IR detector
4.LCD display


please reply soon..
thx u in advance..

keil lcd in 4 bit mode

Go to analog device download code for ADUC847 or 842. Lot of samples there

or go to atmel to download some from there

keil sample

Is this any use, actually for AT89s8252/3. should not require many changes. For 1x16 display, electrically 2x8.

P1.0 = RS
P1.1 = E
P1.2 = D4
P1.3 = D5
P1.4 = D6
P1.5 = D7

Ground Pin 3 on LCD

Delay shown is "Delay.h"



Delay.h

#define XTAL_FREQ 12
#define DelayUs(x) { unsigned char _dcnt; \
_dcnt = (x)*((XTAL_FREQ)/12); \
while(--_dcnt != 0) \
continue; }
extern void DelayMs(unsigned char);


LCD.h

/*
* LCD interface header file
* See lcd.c for more info
*/

/* write a byte to the LCD in 4 bit mode */

extern void lcd_write(unsigned char);

/* Clear and home the LCD */

extern void lcd_clear(void);

/* write a string of characters to the LCD */

extern void lcd_puts(const char * s);

/* Go to the specified position */

extern void lcd_goto(unsigned char pos);

/* intialize the LCD - call before anything else */

extern void lcd_init(void);

extern void lcd_putch(char);

/* Set the cursor position */

#define lcd_cursor(x) lcd_write(((x)&0x7F)|0x80)

LCD.c

#include <reg51.h>
#include "delay.h"

sbit LCD_RS =P1^0; // Register select
sbit LCD_E =P1^1; // Enable

#define LCD_STROBE ((LCD_E = 1),(LCD_E=0))

// Time in Milliseconds
void DelayMs(unsigned char cnt)
{ cnt=2*cnt;
do
{DelayUs(500);}
while(--cnt != 0);
}

// Send to Display
void lcd_write(unsigned char c)
{
unsigned char Movit;
Movit = (c >> 2);
P1 = (P1 & 0xC3) | (Movit & 0x3C);
LCD_STROBE;
Movit = (c << 2);
P1 = (P1 & 0xC3) | (Movit & 0x3C);
LCD_STROBE;
DelayUs(60);
}

// Clear and home the LCD
void lcd_clear(void)
{
LCD_RS = 0;
lcd_write(0x80);
DelayMs(2);
}

// Position the Cursor
void lcd_goto(unsigned char pos)
{
LCD_RS = 0;
lcd_write (0x80+pos);
}

// Send Character String
void lcd_puts(const char * s)
{
unsigned char cursor = 0x00;

while(*s)
{
LCD_RS = 1;
lcd_write(*s);
s++;
cursor++;
if (cursor==0x08)lcd_goto(0x40); // Change to 0x80 for simulation
if (cursor==0x10){cursor=0;lcd_goto(0x00);}
}
}


// Initialise the LCD - mode 4 bits
void lcd_init(void)
{
LCD_RS = 0;
DelayMs(40); // power on delay
lcd_write(0x28); // 4 bit mode, 1/16 duty, 5x8 font
LCD_STROBE;
DelayMs(5);
LCD_STROBE;
DelayMs(5);
LCD_STROBE;
lcd_write(0x28);
lcd_write(0x08); // display off
lcd_write(0x0C); // display on, cursor off
lcd_write(0x06); // entry mode
}