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本文介绍了两种分频系数为整数或半整数的可控分频器的设计方法。其中之一可以实现50％的奇数分频。利用VHDL语言编程，并用QUARTERS||4.0进行仿真，用 FPGA 芯片实现。 关键词：半整数，可控分频器，VHDL, FPGA -This article describes two kinds of sub-frequency coefficient is an integer or half-integer divider controllable design method. One of them can achieve 50 of the odd-numbered sub-frequency. The use of VHDL language programming, and QUARTERS | | 4.0 simulation, using FPGA chip. Key words: semi-integer, controllable divider, VHDL, FPGA

这是一个pid 程序，完成PID的计算和控制过程-This is a process pid to complete the calculation and control process PID

电子密码锁，可以自己设置密码，C语言编写的-Electronic code lock, you can set up their own password, C language

利用PWM产生高精度正弦波,从PWM引脚输出的脉冲信号经过简单的低通滤波后,可以得到平滑的正弦波,波的频率可以微调-produced using high-precision sine wave PWM, PWM output pin from the pulse signal through simple low-pass filter, can be smooth sine wave, the wave frequency can be fine-tuned

程序下载在M16中后，以后不需要任何编程器，只需连接串口就可以使用STK500专业编程器的功能 -Download of the M16, after does not require any programming, simply connect serial port on the STK500 can use the functions of professional programmer

这是DA的资料 这是DA的资料 这是DA的资料 -this is for DACthis is for DACthis is for DACthis is for DACthis is for DACV

通过DS18B20读取温度（范围-55C~125C，精确到小数点后一位），通过4位数码管显示出来。 当温度为正且百位为零时，不显示，当温度为负时百位显负号。当温度百位和十位都为0时0都不显示。-Read through the DS18B20 temperature (range-55C ~ 125C, accurate to one decimal), through four digital tube display. When the temperature is zero and 100, do not show, when the temperature is significantly negative at minus 100. When the temperature is 100 and 10 are not displayed 0:00.

TFT9320的驱动程序，可以使用在不同的平台中-TFT9320 driver, you can use in different platforms

这是一个c8051F020单片机通讯程序，请各位大侠，看了后多提宝贵意见。-C8051F020

NEC公司的ASSP芯片pdf文档，用于步进电机和直流电机的PWM控制，支持与51单片机通信。-NEC corporation，ASSP chip，datasheet，pdf，function is control the motor,using step control or PWM control.