单片机51系列测试串口的简单程序反回输入字符

单片机音乐编码软件 单片机音乐编码软件-linhloihoiuhou

i2c总线协议，很好的协议-i2c bus protocol, good deal

//P89C51RC+、P89C51RD+特有例子//初始化错误或通信错误等待1秒，让 //pc程序超时并报告错误-//P89C51RC, P89C51RD specific examples// initialization error or wait for a communication error seconds,// pc overtime procedures and report errors

S3C2410 SD卡驱动程序,开发板是傅立叶电子的FFT2410-S3C2410 SD card driver development board is the Fourier electron FFT2410

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.

在keil C51下的fm24c04a的c程序-in the process of c fm24c04a

提供了LED点阵显示的Proteus仿真电路，和汇编代码。-LED dot matrix display provides a simulation circuit of the Proteus, and assembly code.

介绍一种高分辨率的双路A/D转换器AD7711，能满足双路A/D采样要求。内容包括AD7711的特点， 内部寄存器结构和外部接口，并详细阐述了数据采集系统中AD7711与单片机AT89S8252的接口技术，包 括硬件接口电路和软件程序设计及其注意事项。 -Introduce a two-way high-resolution A/D converter AD7711, can satisfy the dual A/D sampling requirements. Include the characteristics of AD7711, the internal register structure and the external interface, and detailed data acquisition system with the AD7711 single-chip AT89S8252 interface technologies, including hardware interface circuit and software design and its attention to matters of procedure.

单片机c语言 初学者有用 有例子哦-SCM c language for beginners there are examples of useful oh

步进电机速度控制，根据要求设计步进电机速度曲线-Stepper motor speed control, according to design stepper motor speed curve