51单片机的8位数码管显示0~F字符，单片机教程：http://www.ipbb.cn，数码管码有共阳共阴之分哦，需要注意哈 -51 single-chip 8 digital display 0 ~ F character, the microcontroller tutorial: http://www.ipbb.cn digital pipe yards total of Yang Yin divided Oh, you need