音乐盒程序

用C语言编写的单片机串口收发程序,使用时将其粘贴到C格式文件中即可-Use of C language procedures for single-chip serial transceivers, use paste it into C format document can be

本程序是用于高速冲床上的送料控制程序，一个较为简单的89C51中断、定时计数器应用程序，已经调试成功，今天为大家出点力，也希望能在以后的学习中能得到大家的帮助。-This procedure is used for high-speed red bed feed control procedures, a relatively simple 89C51 interrupt, timer counter application has debugging success for the U.S. today, a little effort, but also hope to study in the future everyone will be help.

This a program that I wrote many years ago. It is a floppy disk , disk copy,disk info,and format program. All written in masm assembler. There is also a small 252 byte driver that allows nonstandard floppy formats on dos systems below 7.0. Floppies can be formatted in any track and sector layout. 1.44M floppies can be formatted to 1.76 M. All source code,includes and libraries are included. Modify the bld.bat file to your own needs. There are many asm tricks in the source code. Have fun with this old code.-This is a program that I wrote many years ago. It is a floppy disk , disk copy,disk info,and format program. All written in masm assembler. There is also a small 252 byte driver that allows nonstandard floppy formats on dos systems below 7.0. Floppies can be formatted in any track and sector layout. 1.44M floppies can be formatted to 1.76 M. All source code,includes and libraries are included. Modify the bld.bat file to your own needs. There are many asm tricks in the source c

s3c44b0初始化的引导程序，包括系统初始化，定义堆栈，进入主程序。-S3C44B0 guidance initialization procedures, including system initialization, the definition of the stack into the main program.

此程序对端口进行测试，保证其方向的正确性。-This procedure to test port to ensure the correctness of its direction.

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

武汉理工大学计算机学院 汇编语言课程设计之乐曲程序源代码-Wuhan Polytechnic University computer science curriculum design language compilation of musical source code

显示led数码管的控制程序-show led to the digital control procedures governing

实现原理是由8279的8*2键盘控制373扩展输出口，由一位片选信号线连接的8088CPU的一个地址上，8279的每一个键值控制8088里面的每一套方案，由8088控制373扩展口输出给单色灯，实现节日灯的效果。-Principle is that by 8279 to achieve the 8* 2 keyboard to control the expansion of output 373, by a chip select signal lines connected to an address on 8088CPU, 8279 every 8088 key control inside each set of program control 373 by 8088 expansion of output to the monochrome lights, festive lights to achieve results.

本例载波频率为20KHz，或载波周期为50μs。DSP晶振10MHz，内部4倍频，时钟频率为40MHz，计数周期为25ns。假设调制波频率由外部输入（1～50Hz），并转换成合适的格式（本例为Q4格式）。调制系数M为0～0.9。死区时间1.6μs。最小删除脉宽3μs。 主程序的工作是根据输入的调制波频率计算N、2N和M值。 -Example for the carrier frequency 20KHz, or carrier period is 50μs. DSP crystal 10MHz, internal 4 multiplier, the clock frequency of 40MHz, counting cycle 25ns. Assuming wave frequency modulation by external input (1 ~ 50Hz), and converted into an appropriate format (in this case for Q4 format). Modulation coefficient M is 0 ~ 0.9. Dead time 1.6μs. Delete the smallest pulse width 3μs. The work of the main program is based on input frequency modulation wave calculation of N, 2N and M values.