接口键盘和液晶屏上AT89S52代码

大屏幕led点阵显示的驱动时序。 使用vhdl语言描述。其中rom文件可以使用lpm_megcore自动生成。-big screen led to the dot matrix display driver timing. The use of VHDL description language. Rom which documents can be automatically generated using lpm_megcore.

this the for a equiripple filter-this is the for a equiripple filter

说明：  在Xilinx环境下编写的vhdl程序，实现推箱子的游戏任务，界面很漂亮。(Xilinx environment in the preparation of the VHDL program, realized the game viewing tasks, the interface is very beautiful.)

40M时钟输入经过iserdes倍频到960M(input 40M o clock and output 960M )

DDR2 SDRAM仿真模型，适合于ModelSim下工作，请先阅读readme(DDR2 SDRAM Simulation Model which is suitable for modelsim. Please read readme file firstly.)

基于fpga的数字电压表的设计，包括ad转换，bcd码转换，分频，3选1模块，小数点生成模块，显示模块组成。(Based on the FPGA digital voltage meter design, including AD conversion, BCD code conversion, frequency,3 choose1module, a decimal point generating module, display module. )

在FPGA上编写的通过SPI总线配置外部DAC芯片DAC5686的程序，通过板级调试，验证可用。程序通过状态机实现，将需要配置的寄存器值转为SPI总线的数据格式发送出去。 (Configure external DAC chip DAC5686 via SPI bus program on FPGA written by board-level debugging, verification is available. Program through the state machine, you will need to configure the register values 椠渀琀漀 SPI bus data format sent.)

FPGA上的一个半加器实例程序，通过测试，可以直接运行在fpga开发板上。(One and a half adder example on FPGA program, through the test, can be run directly on the FPGA development board)

32位存储器Verilog附带test文件，可以在modulesim仿真 还有加法、减法器，译码器等常用Verilog器件，都附带仿真test。(Memory test with Verilog)

实现自然对数运算的cordic算法的matlab浮点仿真，以及针对FPGA硬件平台的定点仿真测试(Achieve natural logarithm of cordic algorithm matlab floating point emulation, and FPGA hardware platform for fixed-point simulation testing)