此程序对端口进行测试，保证其方向的正确性。

好的资料-Good information

此程序完成功200HZ的固定频率,稳定性很高,波形失真度小,如果要想产生固定频率,这个程序是最好的选择!-success of this procedure 200Hz End of fixed-frequency, high stability, waveform distortion small, if they have a fixed-frequency, the procedure is the best choice!

从键盘读入一个四位的十六进制数，CRT显示等值的二进制数. 由于每个十六进制数位对应4个二进制，所以每读入一个十六进制位后，即可将其对应的4个二进制位依次输出。由于数字‘０’~ ‘９’的ASCⅡ码为30H～39H,字母‘a’～‘f’与 ‘A’～‘F’的ASCⅡ码为61H～66H 与41H～46H ，因此，如果输入的字母为数字‘０’～‘９’，则其低４位即为对应的二进制位；如果输入的字符为字母‘ａ’～‘ｆ’或‘Ａ’～‘Ｆ’，则需要减７，然后通过移位将低４位依次输出。 -Reading from the keyboard into a 4 hexadecimal number, CRT display equivalent binary number. Since each hexadecimal number of the corresponding 4-bit binary, so every time into a hexadecimal places, can be its corresponding 4-bit binary sequence output. Due to the number

与java相关的各种例程 不是很难 适合初学者 上手比较容易-And java-related routines are not difficult to get started is easier for beginners

c51原程序，好用的参考一下吧，我也有电动车程序２０５１的，有要的跟我联系！１３４０１３３０７３３　肖良军-C51 original procedure, useful for reference, I also have the electric car program in 2051, has wanted to contact me! Liang Xiao-jun 13401330733

这是液晶程序的源代码-This is a program"s source code

jpxs程序功能可以实现，但本人认为算法比较混乱，待以后作出好的算法。 键盘用p2.2--p2.7 码显示用p3.6,p3.7-jpxs program features can be achieved, but I think that the algorithm a bit confusing, to be later made a good algorithm. P2.2 p2.7 code using the keyboard display with p3.6, p3.7

（1）该码功能是将数组后n为一次放在数组前面，不改变其他元素顺序； （2）用二分法求方程的根。-(1) of the code after the function is an array on an array of n for the first time in front of the other elements do not change the order (2) equation for the root of the dichotomy.

DS1302读写程序　万年历　数码管子显示 DS1302读写程序　万年历　数码管子显示-DS1302 to read and write procedures for calendar DS1302 digital tube display to read and write procedures for calendar digital tube display

使用51单片机实现时钟设计的仿真，有源程序以及Proteus的仿真图，希望对大家有帮助。-design clock。