st arm7中的71x中部分功能源代码，运行在ADS环境下

基于AVR的超声波测距程序，使用DS1820测温修正距离-Ultrasonic Distance Measurement Based on the AVR, the use of the amendment from the DS1820 temperature measurement

51单片机用串口接收645规约。已经调试好 有详细的说明-51 single-chip receiver with serial port 645 of the Statute. Already have good debugging detail

使用AVR128单片机控制串行DA转换器TLV5618进行DA转换，计算精度高-The use of AVR128 SCM TLV5618 serial DA converters for DA conversion, calculation and high precision

keil c程序,用于AT89S52单片机.使用了T2计数器,有频率计的功能-keil c program for single-chip AT89S52. the use of the T2 counter, there is the frequency of functional

用单片机蜂鸣器实现911报警声音，采用中断延迟实现输出频率的变换。-Used to achieve single-chip buzzer 911 sounds, using interrupt latency to achieve an output frequency of transformation.

MSP430单片机FLASH系列的PCB和原理图库，很好用的啊！-MSP430 Flash series and the PCB Principle Gallery, the good ah!

NES可以说是现下最老的游戏了，任天堂的经典游戏，这些年随着手机游戏的流行，NES游戏重新粉墨登场！-NES can be said that holds many lessons for the oldest games, and Nintendo" s classic games, all these years with the popularity of mobile games, NES game back on stage!

基于单片机的频率采集、计数以及显示程序,具有广泛的作用~-The frequency of single-chip based on the collection, counting and display procedures, the role of a broad ~

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.

at89c5x系列的at89s53的芯片资料-at89c5x series chips at89s53 information