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1、用8255的A口驱动六个七段数码管（LED）的字段，C口驱动六位七段数码管（LED）的位控端，右侧两位显示分值，左侧两位显示秒值。 2、段数码管采用动态扫描方式，用8253做定时器（采用查询方式），每位显示的时间50Hz。 3、以5ms为基本时间单位，计数产生秒时间值，秒计数到60时对分计数，分计数到69时对时计数。 -BUFF_KEY EQU 21H BUFF_LED1 EQU 22H BUFF_LED2 EQU 23H BUFF_LED3 EQU 24H BUFF_LED4 EQU 25H BUFF_LED5 EQU 26H BUFF_LED6

it is about resturant billing software which help us to use billing software in resturant

AVR 矩阵时钟。8 x 8 LED 矩阵使用 ATMEL AVR 单片机。RTC 时间由 DS1302 控制

这是一个学生成绩管理系统，其中“I”表示插入，“L”表示浏览，“Q”表示查询， “E”表示退出，“D”表示删除，“M”表示修改,"c"表示统计各分数段人数,"p"表示打印. 本程序实现了： （1）单独运行以上各功能,即在进入主菜单以后，点一功能键后关闭，再进入主菜单 点别的功能键。如运行"cjgl"文件后,在出现的主界面中点“I”，可插入数据，插入完 以后，关闭；在出现的主界面中点“M”，可修改数据，修改完以后关闭，用同样的方法 可运行其它的功能。 （2）连续运行部分的功能。-This is a performance management system for students, "I" to insert said, "L" said View, "Q" said inquiries, "E" from "D" to delete said, "M" said the amendments, "c", said Statistics the fraction of the number of "p" said Print. this procedure was realized : (a) separate operations over the function, which is to enter the main menu after a point after the closure of function keys, and entered the main menu point other function keys. To run "cjgl documents" in the main interface midpoint "I" can be inserted in the data, insert, after closing; At the midpoint of the main interface, "M", may revise the data, modify, after the closure, the same

调用库文件设计的流水灯，简单易懂而且实用！-Call the library file designed water lights, easy-to-read and practical!

使用汇编语言用来检测液晶屏幕有没有坏点等错误-use asm language to detect whether LCD screens are Dead.

实现2*2键盘扫描，使用的扫描方式为行列扫描法-Realize 2* 2 keyboard scan, used for scanning the ranks of scanning method

这个是直流无刷电机的基于DSP2407的速度控制源代码，希望对大家有所帮助，平台是CCS2-This is a brushless DC motor speed control based on the DSP2407 source code, everyone would like to help, platform is CCS2

汇编语言程序设计-assembly language programming

这是一个用汇编语言写的四位数码显示程序（先显示P，然后按键则显示相应的键码。）-This is a compilation of the language used to write the four digital display program (the first show that P, and then showed the corresponding button key code.)