keil 开发 实验目的：学习读读写SPI总线器件及时钟芯片程序编写

实验方法：实验源代码编写程序，下载到单片机。实验现象：字符液晶屏上显示年月日万年历

-keil the development of the experiment was: to learn to read and write SPI bus time clock chip devices and procedures for the preparation of experimental methods: the experimental programming source code, download the single chip. Experimental phenomenon: character LCD display date calendar