-
First, the use of a keyboard display interface chip receive keys keys 8279, and...
一、 使用键盘显示接口芯片8279接收按键键值，并在七段数码管上显示出来，通过判断键值进入相应音乐播放处理程序。在音乐播放程序中，使用定时器/计数器8253的计数器2，使其工作在方式¬ ¬ 3―方波发生器，通过查表依次取出乐曲频率值送入计数器作为计数初值，经out2输出方波，驱动扬声器发出不同频率的声音，在每个音阶之间加入相应的延迟时间，即实现了音乐的播放。-First, the use of a keyboard display interface chip receive keys keys 8279, and Seven-Segment LED display, through to determine the corresponding music player keys to enter the treatment program. Procedures in the music player, use the timer/counter 2 counter 8253 to work in the way ? ? 3- square-wave generator, followed by out music through the look-up table values into the counter as a frequency count of the initial value, the output side out2 waves, driven loudspeakers of different frequency sound, in between each scale by adding the appropriate delay time, namely, the realization of the music player.
- 2023-03-17 05:55:03下载
- 积分：1
-
Mini Tetris
很小的俄罗斯方块，只用了440字节，能在DOS、WIN95、WIN98、WINME、WIN2000，XP下运行（其他的系统我没试过，可能行也可能不行）。-Mini Tetris
- 2022-06-02 11:55:12下载
- 积分：1
-
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...
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
- 2022-04-21 15:42:22下载
- 积分：1
-
它的源代码，外国人高
ad9951的源代码，外国人高的用兴趣的朋友，看看希望对你有帮助-AD9951 source code, foreigners with high-interest friends to see if you would like to have help
- 2022-06-15 09:31:10下载
- 积分：1
-
opfdsgfsdertg tuyhderfgsfsdafasd
opfdsgfsdertg tuyhderfgsfsdafasd
- 2022-05-21 07:19:08下载
- 积分：1
-
在mdi client窗口的客户区域显示移动的星星的程序
在mdi client窗口的客户区域显示移动的星星的程序-Mdi client window in the customer area of the stars shows that the procedures for mobile
- 2022-03-06 02:14:06下载
- 积分：1
-
The DMA used in 8237 experiments, the use of environmental integrated environmen...
用于8237的DMA实验，使用环境可为Winxp Xingyan集成环境-The DMA used in 8237 experiments, the use of environmental integrated environment for Winxp Xingyan
- 2022-02-14 23:53:30下载
- 积分：1
-
ds1302时钟电路的汇编语言程序，编译无法通过，请各位大虾指教...
ds1302时钟电路的汇编语言程序，编译无法通过，请各位大虾指教-DS1302 clock circuit assembly language program, the compiler can not, please enlighten prawns
- 2022-03-02 07:27:59下载
- 积分：1
-
通用键盘显示程序，可连接带有isp接口的嵌入主板
通用键盘显示程序，可连接带有isp接口的嵌入主板-Universal Keyboard Viewer, can be connected with the isp interface embedded motherboard
- 2022-11-29 11:40:03下载
- 积分：1
-
Beginning to show 00 , 1st press SP1 after the beginning of time. 2nd by SP1, t...
开始时，显示“00”，第1次按下SP1后就开始计时。
第2次按SP1后，计时停止。
第3次按SP1后，计时归零。
-Beginning to show 00 , 1st press SP1 after the beginning of time. 2nd by SP1, the time to stop. The 3rd by SP1, the time zero.
- 2022-11-05 23:25:03下载
- 积分：1
