fangmiandefhf H FFT

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.

基于凌阳波形发生器的程序，产生三角波，方波，正弦波，100Hz~200KHz-Sunplus based waveform generator procedure, resulting in the triangular wave, square wave, sine wave, 100Hz ~ 200KHz

要求程序建立一个可存放50项的电话号码表，每项包括人名（20个字符）及电话号码（8个字符）两部分； 程序可接受输入人名及相应的电话号码，并把它们加入电话号码表中； 凡有新的输入后，程序应按人名对电话号码表重新排序； 程序可接受需要查找电话号码的人名，并从电话号码表中查出其电话号码，再在屏幕上以如下格式显示出来。 -Require the establishment of a process to deposit the telephone number of the table 50, each including the name (20 characters) and telephone number (8 characters) in two parts program acceptable to enter the names and corresponding telephone numbers and telephone numbers to join them in the table where a new input, the program should list the names of the telephone number to re-sort procedures acceptable to the need to find phone numbers names, phone numbers from their telephone numbers found in the table, and then on the screen in the following format displayed.

P1口的某口亮与不亮的变色，不断变色，作指示闪灯用-mouth of a P1-mouth and the bright color, continuously changing color, directed by flashes

数字钟项目。想尝试创造一个7段数字时钟。mikrokontrolerat89s52的来源。blogspot.com网站

一个C style Assembler的source code-one of the C style Assembler source code

8259A中断控制器实验 253A的计数器0为工作方式0，装入时间常数FFFFH，结束中断时显示信息：8253A INTERRUPT EXPERIMENT！-8259A interrupt controller experimental 253A of counter 0 0 way to work, the time constant FFFFH loaded to end disruption to display information : 8253A INTERRUPT EXPERIMENT!

用masm编的显示时间和设置系统时间的汇编源代码，通过提示可以进行相应的功能-masm addendum to the use of time- and time to set up the system source code compilation, can be suggested by the corresponding function

数码管显示交流稳压器,使用A48单片机编写,C言语-Digital display AC voltage stabilizer, the use of the preparation of A48 Singlechip, C language

单门读卡控制器的 设计程序，主要对em读卡机的设计提供可靠的 资料。-Single door reader controller design process, mainly em card reader designed to provide reliable information.