用0832做的波形发生器 做信号的可以看看 用单片机控制的

使用的同步串行三线SPI 接口，可以方便的连接采用SPI 通信协议的外围或另一片AVR 单片机，实现在 短距离内的高速同步通信。ATmega128 的SPI 采用硬件方式实现面向字节的全双工3 线同步通信，支持主 机、从机和2 种不同极性的SPI 时序，通信速率有7 种选择，主机方式的最高速率为1/2 系统时钟，从机方式 最高速率为1/4 系统时钟。-Use three-wire SPI synchronous serial interface, can be used to facilitate the connection of the external SPI communication protocol or another chip AVR microcontroller, realize in the short distance high-speed synchronous communication. ATmega128

ICL7135 4.5位ADC 中文资料-ICL7135 4.5 bit ADC Chinese information

2009年全国电子设计大赛的题目，富有借鉴参考的意义，题目，最新，最好！-National Electronic Design Competition in 2009 the subject of the significance of the rich experiences for the title, the latest, the best!

51的GPIO模拟iic的驱动程序，用宏来定义硬件管脚，容易移植，keil平台-51 GPIO IIC driver simulation, using macros to define the hardware pin, easy to transplant, keil platform

pic18f458单片机PWM如何工作的-pic18f458 microcontroller PWM How does it work

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.

C51写的Zi2020 FM发射模块控制代码！-C51 wrote Zi2020 FM transmitter module control code!

这是一个和proteus结合的一用ds1032实现的例子-lic and with a combination of achieving example ds1032

介绍msp430的c语言编程，有很多例子，通俗易懂，很适合初学者-MSP430 introduction of the c language programming, there are many examples of user-friendly, it is suitable for beginners

44键盘多模块演示程序，使用双向双次键扫描技术LCALL INKEY 双向双次键扫描-keyboard module demonstration, the use of the bi-directional bonding time scanning technology LCALL INKEY meeting of the bi-directional scanning Bond