VHDL硬件描述语言与数字逻辑电路设计―― VHDL语言的基本知识和设计逻辑电路的基本方法及NAX的使用...

基于FPGA，利用vhdl语言结合matlab工具实现dds,已经仿真(Based on FPGA, VHDL language with matlab tools to achieve DDS, has simulation)

说明：  Browser modularization processing, browser modularization combing, browser modularization expansion

fpga上实现的51内核，带有LCD试验，顺利试验成功很好用。(on fpga implementation of 51 core with LCD test, successfully tested well with the smooth.)

计数器是数字系统中使用最多的时序电路，它不仅能用于对时钟脉冲计数，还可以用于分频、定时、产生节拍脉冲和脉冲序列以及进行数字运算等。(Counter is the most frequently used sequential circuit in digital system. It can be used not only for counting clock pulses, but also for frequency division, timing, generating beat pulses and pulse sequences, and performing digital operations.)

说明：  包含一个ALU，实现斐波那契数列的计算。1.接受两个6位二进制输入。2.通过手动输入的时钟驱动每个周期进行一次计算。3.结果输出到led灯（使用NEXYS4开发板）(Including an ALU to realize the calculation of Fibonacci sequence. 1. Accept two 6-bit binary inputs. 2. Each cycle is driven by a clock input manually. 3. Output to LED lamp (using NEXYS4 development board))

至于FSK调制原理就不多说了，这里做的一个实验是二进制频移键控。发送一组码元，通过响应的键控电路监测是发1还是发0然后选择频率控制正余弦电路波形。-see

ad9957的资料，内含有命令字生成器，适合使用该芯片的开发人员(ad9957 data, contains the command word generator for developers using the chip)

说明：  CPU设计，包含基本的指令集，能执行简单的程序。考虑了CPU，寄存器，存储器和指令集之间的关系。即读写寄存器，读写存储器和执行指令。(CPU design, including basic instruction set, to execute a simple program. Consider the CPU, registers, memory, and the relationship between instruction sets. That read and write registers, read and write memory and execution.)

ANALYSIS OF D-FLIPFLOPS

FPGA与PC端实现串口数据的收发，先从PC端接收数据，然后发回给电脑，可通过串口助手验证。(The serial port data is sent and received between the FPGA and the PC. First, the data is received from the PC, and then sent back to the computer. It can be verified by the serial port assistant.)