整数计算 计算器 汇编语言 不含负数

学生选课系统，自己毕业设计时做的，往大家指点！-students, their graduation design done, to instruct you!

超声波避障源码，可以参考，要原理图请联系我-Ultrasonic obstacle avoidance source code, can refer to the schematic, please contact me

JAVA程序编码 JAVA课本代码第三章原代码-Java program code in Java code textbooks Chapter III source code

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

利用汇编语言实现的一个打字练习程序，程序界面为典型的Dos窗口，当字符从窗口顶端掉下来后，如果按键与该字符相同，字符变为红色，在打字结束后，给出打字的统计结果，在打字过程中按ESC可退出程序-The use of assembly language to achieve a typing practice program, the program interface for the typical Dos window, when the characters fall from the top window, if the button with the same characters, the character turns red, in the typing after the end of typing results is given , in the typing process by pressing ESC to exit

在屏幕上开出三个窗口：起止坐标为（5，10）和（15，30），（5，50）和（15，70），（18，15）和（22，65）。要求可用左右方向键选择左窗口或右窗口为当前活动窗口。当一行字符显示满后（左右窗口一行显示20个字符，下窗口显示50个字符），窗口自动向上卷动一行，输入的字符仍显示与最低一行，窗口最高一行向上卷动后消失。用上下方向键可使活动窗口及下窗口内容同时上卷或下卷。输入‘ESC’后结束程序。(huangyujie)-screen out three windows : starting and ending coordinates (5,10) and (15, 30), (5,50) and (15.70) (18.15) and (22.65). Asked about the direction keys can be used to choose the left or right window to window to window current activities. When his characters show after the expiration of (his show window about 20 characters, the next window displays 50 characters), the window automatically scrolling upward here, the importation of characters showed that the minimum here, his highest window scrolling upward disappeared. Up and down direction keys enable activities under the window and window content, but on the next volume or volumes. Importation "ESC" end after the procedure. (Huangyujie)

write flash code

矩阵键盘扫描扫描之线反转法.asm把扫描到的键值，通过计算机的串口发送出去。-KEY scanning line inversion method. Asm

测试BLACKFIN芯片的PPI视频输入功能-test Blackfin chip video input feature PPI

RS232中断通信-RS232 communication disruption