一个俄罗斯方块的源代码，用C语言写的，可以运行。

4x5的键盘扫描,一个实用的单片机键盘程序-4x5 keyboard scanning, a practical single-chip microcomputer keyboard procedures

fft.c - fast Fourier transform and its inverse (both recursively) -fft.c- fast Fourier transform and its inverse (both recursively)

电子参数文档说明，他是关于avr编程的利器，偏重硬件方面。-Electronic parameters of the document shows that he is on the avr programming tool, emphasis on hardware.

用c51编的 键盘输入的乘法运算，增加语句可以增加功能-C51 series with the keyboard input of the multiplication to increase the sentence can increase the functional

c#can yin guan li xi tong

51在多机通讯时可采用此方式，3线式，忙时可无限等待，闲时传输速率高-51 in the multi-machine communication use this form, a three-line, busy waiting for an unlimited time, in his spare time high speeds

ocmj2*8液晶中文显示程序，测试通过-English ocmj2* 8 LCD display procedures, test

有关键盘接口的程序，我自己弄的，希望有帮助-Procedures relating to the keyboard interface, I get and I hope that helps

C51编写的IC卡读写程序-C51 prepared by the IC card reader procedures

PIC单片机无符号数运算子程序,可以直接调用!-PIC unsigned few Operational subroutine can directly call!