162.c

结合温度传感器的实现测温度的C程序 这个小项目用到了比较多的AVR单片机的资源 是个不错的学习例程

#include <io8515v.h>
#include <macros.h>
#include <162-1302.h>
void delay_ms(unsigned char n)
	{
	unsigned char a, b;
	for (a = 1; a<n; a++)
		for (b = 1; b; b++)
			;
	}
void delay_us(unsigned int n)
	{
	unsigned char  b;
		for (b = 1; b<n; b++)
			;
	}
	
void LCD_wait(void)   	 	    //等待LCD空闲
{
LCD_DATA_PORT&=~BIT(7);
PORTB&=~BIT(0);
PORTB|=BIT(1);
PORTB|=BIT(2);
while(!(LCD_DATA_PIN &0x80)==0);
LCD_DATA_DDR|=0xFF;
PORTB&=~BIT(2);
}

void command_enable()  		   	//写指令使能
{ 
PORTB&=~(BIT(0)|BIT(1));
PORTB|=BIT(2);
asm("nop");
PORTB&=~BIT(2);
}
void data_enable()				//写数据使能
{
PORTB|=BIT(0);
PORTB&=~BIT(1);
PORTB|=BIT(2);
asm("nop");
PORTB&=~BIT(2);
}

/*设置LCD显示的起始位置输入参数：x、y
显示字符串的位置，X:0-15，Y:0-1
LCD第一行显示寄存器地址：0X80-0X8F
LCD第一行显示寄存器地址：0XC0-0XCF*/
void LCD_set_xy( unsigned char x, unsigned char y )
{
unsigned char address;
if (y==0)
  address=0x80+x;
 else
 address=0xC0+x;
LCD_DATA_PORT=address;     	   //输入开始显示地址
command_enable();
delay_ms(10);
}
//写一个字符
void LCD_write_char(unsigned char data)
{
LCD_DATA_PORT=data;     		
data_enable();
delay_ms(10);
}
//写一字符串
void LCD_write_string(unsigned char x, unsigned char y,unsigned char *s)
{
LCD_set_xy(x,y);
while(*s)
	{
	LCD_write_char(*s);
	s++;
	}

}

void init_lcd()     			//初始化
{
delay_ms(180);						//等待30ms以上
LCD_DATA_PORT=0x38;     		//８位２行５×７点阵
command_enable();
delay_us(100);					//等待39us以上
LCD_DATA_PORT=0x0C;     		//显示器开、光标开、闪烁关
command_enable();
delay_us(100);					//等待39us以上
LCD_DATA_PORT=0x01;     		//清屏
command_enable();
delay_ms(10);						//等待1.53ms以上
LCD_DATA_PORT=0x06;     		//输入方式
command_enable();
delay_ms(180); 					//初始化完毕
}