本模块主要包含两个部分，即DS1302的操作和软时钟。DS1302的操作包括内部数据的读取和向DS1302写入数据，以及读取数据正确性的判断，另外由于此模块对DS1302的操作采用模拟SPI的方式，因此在DS1302操作部分加入了如果读取DS1302数据错误则连读多次（目前为3次，可更改）的机制，以避免模拟通讯造成的误读。 软时钟部分包括MCU自设时钟的更新以及星期值的计算。-This module mainly contains two parts, that is, the operation of DS1302 and soft clock. DS1302 operation include internal data read and write data to the DS1302, and read the data correctness judgments, also due to the use of the operation of the module of DS1302 simulation SPI way, so in the operation part of the DS1302 joined the if reading DS1302 data error is linking multiple (currently 3 times to change the mechanism, in order to avoid misunderstanding caused by communication simulation. The soft clock part includes the MCU self set clock update and the calculation of the value of the week.