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CF卡数据手册，内有详细的工作模式说明和寄存器配置-datasheet for cf card

sm1628是一种带键盘接口的LED驱动控制专用IC，带有内部MCU-sm1628 is a keyboard interface with LED-driven control of a dedicated IC, an internal MCU

运动员成绩统计系统-athletes achievements statistical system

请认真书写上传资料的详细功能、包含内容说明(至少要20个字)。尽量不要让站长把时间都花费在为您修正说明上。压缩包解压时不能有密码

pid参数的调节方法，对pid参数的选定有很大帮助，是前人的总结不可不看。-pid adjusting the parameters of the method, the pid of the selected parameters will be of great help, is summed up by our predecessors can not see.

将TXT文件转换成PDF文件,从CODEPROJECTS网站上得来的,很好用!-to TXT files into PDF files from CODEPROJECTS website due to good use!

sift算法详细步骤演讲资料，对sift理解很有帮助-sift algorithm detailed steps lecture information on the sift helpful to understand

通常我们在撰写高效电子邮件中要注意的事项。-Usually we write a high-performance e-mail to note.

* 本算法用最小二乘法依据指定的M个基函数及N个已知数据进行曲线拟和 * 输入: m--已知数据点的个数M * f--M维基函数向量 * n--已知数据点的个数N-1 * x--已知数据点第一坐标的N维列向量 * y--已知数据点第二坐标的N维列向量 * a--无用 * 输出: 函数返回值为曲线拟和的均方误差 * a为用基函数进行曲线拟和的系数, * 即a[0]f[0]+a[1]f[1]+...+a[M]f[M]. -* The algorithm using the least-squares method based on the designated function of M and N-known curve data to be imported and* : m-- the known number of data points M* f-- From M* n vector function-- known data points the number N-1* x-- known data points of the first N-dimensional coordinates listed Vector* y-- known data points of the second N-dimensional coordinates shown in a vector*-- useless* Output : function return value to the curve-fitting and the mean square error* for the use of a base function and the curve fitting coefficients,* is a f [0] [0] a [1] f [a] ... a [M] f [M].

空气湿度报警器，顾名思义，是用来测量空气中的湿度的仪器，他通过一个湿敏电容和一个频率输出电路对空气湿度进行检测，把湿度变化转变成频率输出。再通过单片机把输入的频率转化为湿度百分值并通过LCD显示出来，使人可以通过显示清楚地看到空气的相对湿度。在单片机编程时可以预先设定一个限定值，当环境湿度达到设定的湿度值时电路报警，同时发光二极管变亮，达到湿度报警的目的。-Air humidity alarm, as the name implies, is used to measure humidity in the air apparatus, he humidity through a capacitor and a frequency output circuit for detection of air humidity, the humidity changes in the frequency of the output into. Through the single-chip frequency of the input into a percentile and humidity through the LCD display, one can clearly see through the display of the relative humidity of air. Single-chip can be programmed in advance to set a limit value, when the environmental humidity to achieve set alarm circuit humidity values, while LED light changes to achieve the purpose of humidity alarm.