lcd.c

温度传感器DS18B20的读写程序

#include "lcd.h"
#include "device.h"
#include "iodefine.h"
#include "delays.h"

char lcd_rdata(void);
char lcd_rstate(void);
char lcd_wait(void);

void lcd_wdata(char data);
void lcd_wcmd(char cmd);

char lcd_rdata(void)
{
	char result;
	LCD_DREAD;
	LCD_R;
	LCD_DAT;
	LCD_E=1;
	result = LCD_D;
	LCD_E=0;
	return result;
}

char lcd_rstate(void)
{
	char result;
	LCD_DREAD;
	LCD_R;
	LCD_CMD;
	LCD_E=1;
	result = LCD_D;
	LCD_E=0;
	return result;
}

char lcd_wait(void)
{
	unsigned char busy;
	LCD_DREAD;
	LCD_R;
	LCD_CMD;
	LCD_E=1;
	busy = LCD_BFLAG;
	LCD_E=0;
	while(busy)
	{
		LCD_E=1;
		busy = LCD_BFLAG;
		LCD_E=0;
	}
}

void lcd_wdata(char data)
{
	lcd_wait();
	LCD_DWRITE;
	LCD_D = data;
	LCD_W;
	LCD_DAT;
	LCD_E = 1;
	LCD_E = 0;
}

void lcd_wcmd(char cmd)
{
	lcd_wait();
	LCD_DWRITE;
	LCD_D = cmd;
	LCD_W;
	LCD_CMD;
	LCD_E = 1;
	LCD_E = 0;
}

void lcd_init(void)
{
	unsigned char n;
	LCD_CREGC = LCD_CREGC|0x70;	//set PDR7 as output port
	LCD_DWRITE; 				//set PDR8 as output port
	LCD_E = 0;
	LCD_CMD;
	LCD_W;
	LCD_D = 0x30;		
	for(n=0; n<3; ++n){
		LCD_E=1;
		LCD_E=0;
		DELAY_MS(5);
	}
	lcd_wcmd(LCD_INIT_MASK|LCD_BIT8|LCD_2LINE|LCD_F5X8);
	lcd_wcmd(LCD_CLEAR);
	lcd_wcmd(LCD_INPUT_MASK|LCD_RSHIFT|LCD_NOMOVE);
	lcd_wcmd(LCD_OPEN_MASK|LCD_ON|LCD_NOCURSOR|LCD_NOBLINK);	
}

void lcd_PutStr(char* ptr)

{
	while(*ptr!=0){
		lcd_wdata(*ptr);
		ptr++;
	}
}