使用Altera公司的FPGA进行VHDL开发。使用quartus2 9.0软件在EP1C3T144C8开发板上实现对一个十字路口的交通灯的控制，包括4个红绿灯...

Verilog 语言写的控制 DAC8568 的模块，DAC8568 是SPI接口。(Verilog language used to write the control module DAC8568, DAC8568 is SPI interface.)

The AGC is a smart programmable gain amplifier (PGA). The amplifier gain is adjusted based upon the input signal level so that the output is at a specified Target Gain. The AGC can be configured to be either a mono or stereo input / output component. For illustration purposes, the following discussion will highlight the stereo configuration.

说明：  ds18b20的Verilog程序，经测试验证可以使用。注意此版本为DALLS DS18B20而不是DS1820,注意加5K上拉电阻。(ds18b20 the Verilog process can be used to verify by testing. Note that this version rather than DALLS DS18B20 for DS1820, the attention of Canadian 5K pull-up resistor.)

用于检测信号上升沿，输出与时钟相关的正脉冲(Detect the rising edge of the signal)

有一个 8 位全加器 VHDL 代码。我测试该代码在协同，看到了这段代码的工作。

全部通过，是我的精心设计，完全满足初学者的要求。-all passed, I was carefully designed, fully meet the requirements of beginners.

Z源逆变器简单升压模拟仿真。调制方式为SPWM，通过设置三角波幅值和比较电压，即可调节输出电压。(Z-source inverter simple step-up simulation. Modulation mode SPWM, by setting the the triangle amplitude and the comparison voltage to regulate the output voltage.)

电子表，实现计时记分计秒的功能，同时可以对时分秒进行校正，实现调时功能。-Electronic watches, time points of dollars to achieve a second function, at the same time when the minutes and seconds can be calibrated to achieve when the transfer function.

This tutorial introduce VHDL code for clock pulse and 4-bit counter. With four bits, the counter count from 0 to 15. The timing of the counter is controlled by a clock signal. There will be a clear signal which can reset the counter value.

基于EDA技术设计4位十进制数字频率计的系统方案-Based on EDA technology design four decimal system solutions Cymometer