8255的汇编程序，各种工作方式尽有，是初学者学习的好帮手，也是利用8255扩展IO的普遍方法，只用改下地址直接拿去用就行...

实验五 哈希表 [实验目的] 1、哈希函数的选择 2、用链表创建哈希表 3、输出哈希表 [题目] 假设人名为中国人姓名的汉语拼音形式。待填入哈希表的人名共有30个，取平均查找长度的上限为2。哈希函数用除留取余数法构造。用链表来处理冲突。-Five experimental hash table [the experiment was] one, the choice of hash function 2, create a hash table with linked list 3, the output hash table [subject] assumptions of people known as the Chinese name for the Chinese Phonetic Alphabet forms. Hash table to be populated with the names of a total of 30, taking the upper limit of the average search length of 2. Hash function used in addition to collecting more than the number of law structure. Used to deal with the conflict list.

有n个整数，使其前面各数顺序向后移m个位置，最后m个数变成最前面的m个数 -There is a whole number n, the number of its previous order of the backward shift position m, and finally the number m of m into the top of the number of

1) 东西方向车辆放行20秒钟。即东西方向的绿灯和南北方向的红灯同时点亮20秒钟； 2) 20秒钟后，东西方向的黄灯闪烁2秒钟，以警示车辆将切换红绿灯。此时南北方向仍维持红灯点亮。在南北方向亮红灯期间，在2位数码管上显示计数值（每秒减1），从20减至01。 3) 东西方向的黄灯闪烁2秒钟后，转为南北方向放行20秒钟。即东西方向的红灯和南北方向的绿灯同时点亮20秒钟； 4) 南北方向放行20秒钟后，转为南北方向的黄灯闪烁2秒钟，以警示将切换红绿灯。此时东西方向仍维持红灯点亮。 5) 南北方向的黄灯闪烁2秒钟后，再转为东西方向车辆放行20秒钟。如此循环重复。 -1) direction vehicle release 20 seconds. What is the direction of red and green light at 20 seconds, 2) 20 seconds later, the yellow lights flashing warning vehicles with 2 seconds, switch to the traffic lights. This is still remain red light north-south direction. In the south during the red light, in the direction of the digital display tube of 2 per plan (minus 1), from 20 to 2001. 3) the yellow lights flashing direction to 2 seconds later, the south direction release 20 seconds. What is the direction of the north-south direction of red and green and light 20 seconds, 4) north-south direction after 20 seconds to release the north-south direction, yellow lights flashing warning, with 2 secon

步进电机的运转程序-stepper motor operation procedures

1621的应用,在很多系统中经常见到这种应用,现给大家参考.-1621 applications, in many systems we often see this application, it is for your reference.

zlg7289的源程序，可以做参考-zlg7289 source, reference can be done

IR decode, 红外线解码程序.IC:SN8P1602B-IR decode, infrared decoding procedures. IC : SN8P1602B

特点： 1． 双轴倾角传感器 2． 测量范围0.5g(±30 度)或者1g(±90 度) 3． 单极5V 供电，比例电压输出 4． 高分辨率双轴倾角传感器 5． 数字SPI 或模拟输出 6． 内置温度传感器 7． 长期稳定性非常好 8．高分辨率，低噪声，工作温度范围宽 优势： 长期稳定性好，温度特性优良 抗冲击能力强 应用： 双轴平台调平 倾斜测量 垂直方向的各种角度的测量-Features: 1. Biaxial inclination sensor 2. Measuring range of 0.5g (± 30 degrees) or 1g (± 90 degrees) 3. Unipolar 5V power supply, the ratio of voltage output 4. High-resolution dual-axis inclination sensor 5. SPI digital or analog output 6. Built-in temperature sensor 7. 8 very good long-term stability. High-resolution, low noise, wide operating temperature range of advantages: long-term stability, excellent temperature characteristics of the application of anti-shock capability: dual-axis tilt platform leveling vertical measurement range of the angle measurement

89S51 与数码管显示器以及键盘SW 对应引脚的联机为： P0.0-------------------------数码管显示器的a脚 P0.1-------------------------数码管显示器的b脚 P0.2-------------------------数码管显示器的c脚 P0.3-------------------------数码管显示器的d脚 P0.4-------------------------数码管显示器的e脚 P0.5-------------------------数码管显示器的f脚 P0.6-------------------------数码管显示器的g脚 P0.7-------------------------数码管显示器的dp脚 ； P2.2-------------------------数码管显示器1的驱动脚 P2.3-------------------------数码管显示器2的驱动脚 P2.4-------------------------数码管显示器3的驱动脚 P2.5-------------------------数码管显示器4的驱动脚 P2.6-------------------------数码管显示器5的驱动脚 P2.7-------------------------数码管显示器6的驱动脚 ； P2.2-------------------------键盘SW1 P2.3-------------------------键盘SW2 P2.4-------------------------键盘SW3 P2.5-------------------------键盘SW4 P2.6-------------------------键盘SW5 P2.7-------------------------键盘SW6-devised with the digital control display and keyboard SW corresponding pin online : P0.0------------------------- Digital Display of a foot P0 .1--------

哈弗曼编码的实现，本人亲测完美运行。 编码内容：假设用于通信的电文仅由8个字母组成，字母在电文中出现的频率分别为7，19，2，6，32，3，21，10。试为这8个字母设计哈夫曼编码。 要求：这8个字母任意，输出各字母的编码值。 -huffman Tree