用vhdl实现24小时计数器，方法简单实用。 仿真环境MAXPLUS

同步串行数据发送电路SSDT的基本功能是将并行数据转换成串行数据并进行同步发送。系统写入和读出时序完全兼容Intel8086时序。 系统以同步信号开始连续发送四个字节，在发送中出现5个1时插入一个0，在四个数据发送结束而下一次同步没有开始之前，发送7FH，这时中间不需要插入零 -synchronous serial data transmission circuit SSDT the basic function is to convert parallel data into serial and the same this step. System write and read sequential fully compatible Intel8086 timing. Synchronized signal system to start sending four consecutive bytes, in this emerging 5 1:00 insert a 0, at the end of four data sent and the next synchronization not started before, sending seven FH, then the middle is not inserted

NiosII_Exercises_Ver3,this niosII 3.o for cyclone

本源码为Nios II的开发示例,主要演示Nios II的定时中断器的应用。开发环境QuartusII。 本示例十分经典，对基于SOPC开发的FPGA初学者有很大帮助。-The source code for the Nios II development of an example, the main demonstration Nios II interrupt timing device applications. Development environment QuartusII. This example is very classic, FPGA-based SOPC development of great help for beginners.

xilinx FPGA设计需要的DDR2文件，可以应用于实际设计中(xilinx FPGA design needs DDR2 files that can be applied to the actual design)

说明：  实现AXI,AXI-Lite乒乓地址的传输，AXI,AXI-Lite已经封装成内核，可直接修改后使用(Realize the transmission of table tennis address of Axi and Axi Lite. Axi and Axi Lite have been encapsulated into a kernel, which can be directly modified and used)

实现串口通讯以及SLIP协议传输数据，增加了特殊字符的转义(Realization of Serial Communication and SLIP Protocol)

多倍（次）分频器 请注意: 本例的各个源描述的编译顺序应该是: 52_divider.vhd 52_divider_stim.vhd (Times (times) divider Please note: This case is described in various sources to compile the order should be: 52_divider.vhd 52_divider_stim.vhd)

double edfe trigger d latch

梁祝音乐verilog code --适用于QUATUS II 开发环境下，适合于verilog入门学员(the verilog code of liangzhu )

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