规划方向：此程序应用于简略的农业大棚单点温度感应报警体系。完结温度操控的人工检测到自动检测的改变。可扩展功用，联动电动机和加温器。完结温度的range。本次规划为扩展试验，仅完结程序测验和硬件测验变截止。
触及硬件架构：规划运用的的是stc89c52——18b20共同完结温度收集和数据处理。
stc89c52和18b20运用规范衔接装备，详细可参阅两个原件的规范引荐衔接。实时时钟运用11.592m的。便利核算周期差错。
电源考虑到实际运用装备，由本来的料想外接电源供电改为了电池衔接加lm7805完结。
keil在win7下装置比较费时吃力。
18b20的hex文件无法翻开，留意保存好源代码，便于更改。
主程序运用的不间断循环检测，以便于避免程序进入死循环，不能反映温度调整后的状况。
本程序版权所有：http://www.51hei.com ，能够恣意转载.
主程序规划如下：
#include
#include
#define uchar unsigned char
#define uint unsigned int
#define uint unsigned int
sbit DQ =P3^5; //界说DS18B20通讯端口
sbit lcd_rs_port = P1^7; /*界说LCD操控端口*/
sbit lcd_rw_port = P1^6;
sbit lcd_en_port = P2^4;
#define lcd_data_port P0
sbit beep=P2^7;
sbit dula=P3^7;
sbit lcd_rs_port = P1^7; /*界说LCD操控端口*/
sbit lcd_rw_port = P1^6;
sbit lcd_en_port = P2^4;
#define lcd_data_port P0
sbit beep=P2^7;
sbit dula=P3^7;
//////////////以下是LCD1602驱动程序////////////////
void lcd_delay(uchar ms)/*LCD1602 延时*/
{
uchar j;
while(ms–)
{
for(j=0;j<250;j++)
{;}
}
}
{
uchar j;
while(ms–)
{
for(j=0;j<250;j++)
{;}
}
}
void lcd_busy_wait() /*LCD1602 忙等候*/
{
dula=1;
lcd_rs_port = 0;
lcd_rw_port = 1;
lcd_en_port = 1;
lcd_data_port = 0xff;
while (lcd_data_port&0x80);
lcd_en_port = 0;
{
dula=1;
lcd_rs_port = 0;
lcd_rw_port = 1;
lcd_en_port = 1;
lcd_data_port = 0xff;
while (lcd_data_port&0x80);
lcd_en_port = 0;
}
void lcd_command_write(uchar command) /*LCD1602 命令字写入*/
{
dula=1;
lcd_busy_wait();
lcd_rs_port = 0;
lcd_rw_port = 0;
lcd_en_port = 0;
lcd_data_port = command;
lcd_en_port = 1;
lcd_en_port = 0;
}
{
dula=1;
lcd_busy_wait();
lcd_rs_port = 0;
lcd_rw_port = 0;
lcd_en_port = 0;
lcd_data_port = command;
lcd_en_port = 1;
lcd_en_port = 0;
}
void lcd_system_reset() /*LCD1602 初始化*/
{
{
lcd_delay(20);
lcd_command_write(0x38);
lcd_delay(100);
lcd_command_write(0x38);
lcd_delay(50);
lcd_command_write(0x38);
lcd_delay(10);
lcd_command_write(0x08);
lcd_command_write(0x01);
lcd_command_write(0x06);
lcd_command_write(0x0c);
}
void delay()
{
uint i;
for(i=1000;i>0;i–);
}
{
uint i;
for(i=1000;i>0;i–);
}
void lcd_char_write(uchar x_pos,y_pos,lcd_dat) /*LCD1602 字符写入*/
{
dula=1;
x_pos &= 0x0f; /* X方位规模 0~15 */
y_pos &= 0x01; /* Y方位规模 0~ 1 */
if(y_pos==1) x_pos += 0x40;
x_pos += 0x80;
lcd_command_write(x_pos);
lcd_busy_wait();
lcd_rs_port = 1;
lcd_rw_port = 0;
lcd_en_port = 0;
lcd_data_port = lcd_dat;
lcd_en_port = 1;
lcd_en_port = 0;
}
{
dula=1;
x_pos &= 0x0f; /* X方位规模 0~15 */
y_pos &= 0x01; /* Y方位规模 0~ 1 */
if(y_pos==1) x_pos += 0x40;
x_pos += 0x80;
lcd_command_write(x_pos);
lcd_busy_wait();
lcd_rs_port = 1;
lcd_rw_port = 0;
lcd_en_port = 0;
lcd_data_port = lcd_dat;
lcd_en_port = 1;
lcd_en_port = 0;
}
void lcd_bad_check() /*LCD1602 坏点查看*/
{
char i,j;
for(i=0;i<2;i++){
for(j=0;j<16;j++) {
lcd_char_write(j,i,0xff);
}
}
lcd_delay(200);
lcd_delay(200);
lcd_delay(200);
lcd_delay(100);
lcd_delay(200);
lcd_command_write(0x01); /* clear lcd disp */
}
//////////////////以上是LCD1602驱动程序////////////////
{
char i,j;
for(i=0;i<2;i++){
for(j=0;j<16;j++) {
lcd_char_write(j,i,0xff);
}
}
lcd_delay(200);
lcd_delay(200);
lcd_delay(200);
lcd_delay(100);
lcd_delay(200);
lcd_command_write(0x01); /* clear lcd disp */
}
//////////////////以上是LCD1602驱动程序////////////////
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