说明：  /// ////差动输入，定时启动，由T2定时//////////////// /////////选择6，7通道为ADC0差动转化通道,其中第6通道为P3.6,第7通道为P.7
(/////// Differential input, time to start, from time to time T2 ///////////////////////// choose 6,7 for ADC0 channel difference Dynamic conversion channel, the first of which for the 6-channel P3.6, No. 7 channel for P.7)