熟悉A/D转换 软件思路：选择RAO做为模拟输入通道； 连续转换4次再求平均值做为转换结果 最后结构只取低8位 结果送数码管的低3位显示-Familiar with the A/D conversion software ideas: Select RAO as analog input channels consecutive conversion and then seek the average of 4 times as the results of the f