本程序是一块I2C电路演示板的演示程序，是一个电子钟，里面有ZLG7290，实时时钟8563等电路的有关程序，可供参考。这块板是我给学生做毕业设计用的。-This procedure is a demo board circuit I2C demo program, is an electronic clock, which has ZLG7290, real-time clock circuit 8563, such as about the procedure, for reference.