DS1306小时增量问题

在使用PIC18接口DS1306的数字时钟工程中，我想用按钮来增加小时。它运行良好，24小时模式，但有一个问题，当我尝试了12小时模式。例如，在12小时模式下，上午11点＝0101 0001；晚上12点＝0111 0010；如果我使用按钮使小时增加1，并且指示器AM将变成PM。我真的不知道该怎么办。我真的需要你的建议。提前感谢。



      以下为原文

    During working on digital clock project by using PIC18 interface DS1306, I want to use push button to make an increment of hour. It was working fine with 24-hour mode, but there was an issue when I tried on 12-hour  mode. For example, in 12-hour mode, 11 AM = 0101 0001  ; 12 PM = 0111 0010; if I use push button to make the hour increasing 1, and the indicator AM will become PM. I really did not know how to make it happened. I really need your suggestions. Thanks in advance.