基于FPGA的六路抢答器

利用IIC接口的4路 ADC max1037，采集思路信号，通过在FPGA内部的构建DeltaSigma DAC软核，在VGA液晶显示屏上显示波形。 (IIC interface 4-way ADC max1037, collecting ideas signal the FPGA internal build DeltaSigma DAC soft-core VGA LCD display waveforms.)

千兆以太网设计，包括组包解包，可以实现大数据传输功能。(Unpack the gigabit Ethernet is designed, including group package, can realize large data transfer function.)

IS611v25616在NIOS II 下的驱动-NIOS II in IS611v25616 under the driver

alu 模块，算术逻辑单元，实现简单的控制模块，有最基本的几条指令-alu instruction

接口键盘和液晶屏上AT89S52代码

DDS基本原理，详细讲述了DDS基本原理及设计技巧(DDS Basic principle)

如上图所示， Rst是低电平有效的系统复位信号，Clk是时钟信号。AB[5：0]是地址信号，DB[7：0]是数据信号，wr是低电平有效的写信号。start是启动信号。 模块中有一个64x8的双端口的存储器。系统复位结束后，可以通过AB、DB和wr信号向同步存储器写入数据。当写入64个数据后，给出一个Clk周期宽度的脉冲信号start，则系统从存储器0地址处开始读出数据，读出的8位数据从低位开始以3位为一组，每个时钟周期输出一组，即第一个时钟周期输出[2：0]位，第二个时钟周期输出[5：3]位，第三个周期输出1地址的[0]位和0地址的[7：6]位，直至将存储器中64x8数据全部输出。若最后一组不足三位，则高位补0。 (As shown above, Rst is an active-low system reset signal, Clk is a clock signal. AB [5: 0] is the address signal, DB [7: 0] is the data signal, wr write signal is active low. start is the start signal. Module in a dual port memory of 64x8. After the reset, you can write data to the synchronous memory by AB, DB and wr signals. When data is written to 64, given the width of a pulse signal Clk cycle start, the system begins to read the memory address 0, 8 data read out a low starting with three as a group, each clock outputs a set period, which is the first clock cycle of the output [2: 0] bits, the second clock cycle output [5: 3] position, the third cycle of the output of an address [0] and 0 address [7 : 6] bit, until all the data in memory 64x8 output. If the last group of less than three, the high 0s.)

AMBA总线apb总线的verilog代码以及相关的中断控制。(AMBA bus apb bus verilog code and associated interrupt control.)

在八位七段数码显示管上显示8位学号，要显示的学号可以在程序内改，经设备验证无错误，且运行良好。

用verilog hdl写的Norflash控制器，可实现单字节读写，扇区擦除。(Norflash controller edit by Verilog hdl,it can read or write by Byte,or erase the sector.)