改程序实现了对dalas的1-wire器件温度传感器ds18b20（也可以是ds1825）的驱动，并将温度值显示在液晶屏幕1602上-This program is dedicated to driving the 1-wire device ds18b20(ds1825),which reads the temperature and displays it on the LHD1602

Quartus 9.0 ，VHDL语言写的ds18b20 温度测量，1602液晶显示，还有报警功能，开发板用的是EP1C12F3234C8。-Quartus 9, VHDL language to write the DS18B20temperature measurement,1602 liquid crystal display, and the alarm function, development board is used in EP1C12F3234C8