18b20的程序，我自己写的哦，注释相当详单详细呢。里面还有main的测试。被注释掉了，拿掉注释可以直接测试。供学习单片机的小同学们下载。-18b20 program, I wrote, oh, very detailed notes for more then one. There is also a main test. Commented out, remove the comments can be directly tested. Learning for students to download a small microcontroller.