文件名称:BEST
介绍说明－－下载内容均来自于网络，请自行研究使用
功能：利用PCF8563T芯片和ZLG7290B芯片来显示时间，能够利用键盘实现时间参数的修改， 修改过程中可以“回显”、“闪烁”、 “容错”，并利用蜂鸣器实现时钟系统的“整点报时”
一、硬件连接
1、ZLG7290B芯片的SDA和SCK分别连接P1.0和P1.1模拟IIC协议，RST_L复位端与P1.7口连接，以 便复位操作
2、P1.6连接蜂鸣器用于整点报时（大约响2s）
3、设定始终芯片CLKOUT输出秒脉冲且与P3.2连接（用于显示，每秒钟刷新一次），INT_KEY与P3.3连接（用于修改）
二、可用操作
1、按下D键对P1.2取反来切换显示“年、月、日”和“时、分、秒”
2、修改小时、分钟、秒的参数不合理则显示“ERROR.”，并返回重修修改
3、按键A修改小时/年份，按键B修改分钟/月份，按键C修改秒/日期（修改当前显示内容）- Function: use PCF8563T ZLG7290B chip and chip to display the time, be able to use a keyboard time parameters modification modification process can be echo , blinking , fault-tolerant , and using a buzzer system to achieve clock the chime First, the hardware connection 1, ZLG7290B chip SDA and SCK are connected to P1.0 and P1.1 analog IIC protocol, RST_L reset terminal connected to the P1.7 port to they reset operation 2, P1.6 connected buzzer for chime (about sound 2s) 3, the chip set is always CLKOUT output and the second pulse and P3.2 connection (for display refreshed every second), INT_KEY and P3 .3 connection (for modification) second, the available actions 1, press the D key to toggle the display P1.2 negated to year, month, day and hours, minutes and seconds 2, modify hours , minutes, seconds parameter unreasonable displays ERROR. , and return to the rebuilt modification 3, a key to m
一、硬件连接
1、ZLG7290B芯片的SDA和SCK分别连接P1.0和P1.1模拟IIC协议，RST_L复位端与P1.7口连接，以 便复位操作
2、P1.6连接蜂鸣器用于整点报时（大约响2s）
3、设定始终芯片CLKOUT输出秒脉冲且与P3.2连接（用于显示，每秒钟刷新一次），INT_KEY与P3.3连接（用于修改）
二、可用操作
1、按下D键对P1.2取反来切换显示“年、月、日”和“时、分、秒”
2、修改小时、分钟、秒的参数不合理则显示“ERROR.”，并返回重修修改
3、按键A修改小时/年份，按键B修改分钟/月份，按键C修改秒/日期（修改当前显示内容）- Function: use PCF8563T ZLG7290B chip and chip to display the time, be able to use a keyboard time parameters modification modification process can be echo , blinking , fault-tolerant , and using a buzzer system to achieve clock the chime First, the hardware connection 1, ZLG7290B chip SDA and SCK are connected to P1.0 and P1.1 analog IIC protocol, RST_L reset terminal connected to the P1.7 port to they reset operation 2, P1.6 connected buzzer for chime (about sound 2s) 3, the chip set is always CLKOUT output and the second pulse and P3.2 connection (for display refreshed every second), INT_KEY and P3 .3 connection (for modification) second, the available actions 1, press the D key to toggle the display P1.2 negated to year, month, day and hours, minutes and seconds 2, modify hours , minutes, seconds parameter unreasonable displays ERROR. , and return to the rebuilt modification 3, a key to m
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倒计时时间修改（秒修改不完善）.txt