数字电子设备上下计数器的实现

8位十六进制频率计设计 根据频率的定义和频率测量的基本原理，测定信号的频率必须有一个脉宽为1s的输入信号脉冲计数允许信号；1s计数结束后，计数值被锁入锁存器，计数器清零，为下一测频计数周期做好准备。测频控制信号可由一个独立的发生器（FTCTRL）来产生。-8-bit hexadecimal Cymometer designed in accordance with the definition of frequency and frequency of the basic principles of measurement to determine the frequency of the signal must have a pulse width of the input signal for 1s permit pulse counting signal 1s counting after the total value was locked into the lock depositors, counters cleared for the next count cycle frequency measurement ready. Frequency control signal generator may be an independent (FTCTRL) to generate.

fpga实现ddr数据收发测试，完整的工程，下载解压后，即可正确运行，已多次验证无误(FPGA DDR data receive and receive test, complete engineering, download and unzip, can run correctly, has been verified many times)

uart接收模块 // 波特率：9600 // 数据位：8 // 停止位：1 // 校验位：0(UART receive module Baud rate: 9600 / / / data: 8 / / stop: 1 / / check digit: 0)

说明：  实现二项混合式步进电机的驱动，和步进电机的细分程序。(The driving of binomial hybrid stepper motor and the subdivision program of stepper motor are realized.)

本例为TLC7524接口电路VHDL原程序-Example for the TLC7524 interface circuit VHDL original procedure

鉴于stm32在keil平台上的ADC采集转化，在LCD屏上显示程序(voltage acquisition adc)

EP2C35开发板官方原理图,是altera的官方资料。是fpga电路设计的很好参考典范。-EP2C35 official development board schematics, is altera of official information. Fpga circuit design is a good reference model.

出租车计价器VHDL程序与仿真 的vhdl源代码-Taximeter VHDL procedures and simulation vhdl source code

电机控制中PWM波产生的程序，VHDL语言实现-Motor Control PWM wave generated by the procedure, VHDL language

用vhdl 语言实现138译码器，用vhdl 语言实现138译码器，(vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl vhdl )