单片机上支持SD卡。SPI方式通讯，速度几十K

51单片机软件滤波方法，全部用汇编语言编写-51 SCM software filtering method, all produced by the compilation of languages

脉冲发生测试.此程序为AD9850（DDS）直接数字频率合成器C语言源码。用125M的有源晶振，频率无失真输出可达到40M。-Impulse test. This procedure for the AD9850 (DDS) Direct Digital Frequency Synthesizer C language source code. With 125M active crystal, the frequency output can be achieved without distortion 40M.

51汇编用户手册中文版，讲解51汇编指令和应用。-compilation of 51 Chinese version of a user manual, on 51 compilation instructions and applications.

avrrice软件用于AVR单片机的JTAG调试.-avrrice software for AVR JTAG debugging.

基于凌阳单片机的输入输出口的基本扩展应用源程序-Sunplus based on single-chip input and output port to expand the application of the basic source code

直流步进电机，C51编程，内有程序及PROTUES仿真电路图-DC stepper motor, C51 programming, there are procedures and circuit simulation PROTUES

Sitronix ST7637 驱动原程序码，易读易明，好用方便 -Sitronix ST7637 drive the original program code, readable and easy to understand, easy to use convenient

用51内部定时器在Keil uVision3环境下开发的，可调时间和日期的数字钟，并用1602进行显示。-With 51 internal timer in the Keil uVision3 development environment, the time and date Adjustable digital clock, and display 1602.

本人上传的是 单片机 直控按键演示(汇编).asm 源代码 -I uploaded is the demonstration of single-chip direct control keys (compilation). Asm source code

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