51控制STA013实现MP3音频解码，实现了STA013的初始化、音量调节、静音、音质设置、声道控制。同时包含通过RS232串口控制LCD实现同步显示。代码经...

单片机4×8矩阵键盘的源程序，可以直接使用，并可以选择松手返回和不松手返回-Single-chip 4 × 8 matrix keyboard source code can be used directly, and can choose to let go to return and the return of不松手

SPI是一个环形总线结构，由ss（cs）、sck、sdi、sdo构成，其时序其实很简单，主要是在sck的控制下，两个双向移位寄存器进行数据交换。 假设下面的8位寄存器装的是待发送的数据10101010，上升沿发送、下降沿接收、高位先发送。 那么第一个上升沿来的时候 数据将会是sdo=1；寄存器=0101010x。下降沿到来的时候，sdi上的电平将所存到寄存器中去，那么这时寄存器=0101010sdi，这样在8个时钟脉冲以后，两个寄存器的内容互相交换一次。这样就完成里一个spi时序。 -SPI bus is a ring structure, by ss (cs), sck, sdi, sdo composition, its timing is actually very simple, mainly under the control of the sck and two bi-directional shift register for data exchange. Assuming the following 8-bit register is loaded to send the data to be 10,101,010, rising to send, receive falling edge, high first sent. Well, the first rising edge to the time data will be sdo = 1 register = 0101010x. Falling edge comes, sdi on the level will be stored to the register, then register at this time = 0101010sdi, so 8 clock pulse later, the contents of two registers to exchange time. This will be completed in a spi timing.

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单片键盘扫描keil源码-single source c51 keyboard scan

也与温度计，里面有详细电路图，照片，功能，结合电子闹钟，使用，简单，易学习-Also with the thermometer, which has detailed circuit diagrams, photos, features, combined with electronic alarm clock, use, simple and easy to study

这是我用C语言写的一个数字钟，他可以实现多种闹钟和秒表功能-This is because I use C language written in a digital clock, he can achieve a variety of alarm and stopwatch functions, etc.

单片机8051点对点通信程序，是个例程，大家可以参照做修改！-8051 single-chip point-to-point communication program is a routine, we can modify the light to do!

可进行不同数组联系起来的16位crc的校验.内部含有中文说明,并且已经测试过,完全正确.就是自己平时进行应用的程序.-Can be linked to a different array of 16-bit CRC checksum. Internal note containing Chinese and have been tested, absolutely correct. Is usually carried out its own application procedures.

AT91RM9200-DK的cf卡读写程序-AT91RM9200-DK

24c16读写程序，I2C总线的，我试过，可以使用-24c16 literacy procedures, I2C bus, I tried to use