使用正弦波Modelsim仿真生成程序

采用VHDL编写的频率计，模块划分清晰易懂，基本原理为检测一个闸门脉冲周期内的信号次数，采用四段数码管显示

VHDL实现SPI功能源代码 -- The SPI bus is a 3 wire bus that in effect links a serial shift -- register between the "master" and the "slave". Typically both the -- master and slave have an 8 bit shift register so the combined -- register is 16 bits. When an SPI transfer takes place, the master and -- slave shift their shift registers 8 bits and thus exchange their 8 -- bit register values.-SPI realize the functional VHDL source code The SPI bus is a 3 wire bus that in effect links a serial shift register between the

本文档介绍了通用异步收发器（UART）VHDL 组件，它可以使用，也可以与PmodRS232或与一个板上的RS232端口。一个UART 部件被用于转换串行数据为并行数据，并且并行数据为串行数据。串行 转移到UART数据被放置在一个输出总线经过了UART将其转换成并行 信息。该总线可以被用作输入到其它逻辑门阵列中。所得到的数据可 然后再次使用UART组件被送回了串行。

FPGA控制RS232来实现串口通信，非常好的串口程序。(FPGA control RS232 serial communication to achieve very good serial procedures.)

*** ***OC_I2C_Master使用说明*** ***** 使用步骤：1.将OC_I2C_Master文件夹拷贝到安装盘alterakits ios2components目录下。 之后重新打开SOPC Builder，在可用元件列表的DeviceSOPC组中将出现OC_I2C_Master 元件，即可像其它Altera外设元件一样添加和使用。 2.hdl文件夹中包含有描述i2c逻辑的硬件描述文件，不能删除。 3.HAL文件夹包含硬件抽象层所需的文件（即驱动），不能删除。 4.inc文件夹包含有定义底层硬件的C语言头文件，不能删除. 5.I2C_doc文件夹下有关于该元件的开发文档。-********* OC_I2C_Master use*********** use these steps: 1. OC_I2C_Master folder will be copied to the installation disk alterakits ios2components directory. Re-open after the SOPC Builder, a list of available devices will appear DeviceSOPC Group OC_I2C_Master components, can be similar to other peripheral devices like Altera add and use. 2.hdl folder contains logical description i2c hardware description files, can not be deleted. 3.HAL folder contains the necessary hardware abstraction layer file (ie drivers), can not be deleted. 4.inc folder contains the definition of the underlying hardware C language header files, should not delete. 5.I2C_doc folder on the developmen

红外接收处理，根据外部波形记录波形的高低电平时间，从而得到波形数据。(Infrared receiver processing, according to the external waveform waveform record high and low times, resulting waveform data.)

verilog实现的串口实现代码，可以直接复制使用(verilog achieve serial implementation code can be copied directly use)

AM modulated learning ladder

去抖动状态机,外部按键转换状态,同时可去抖动-To shake state machine, the external key conversion state, while to the jitter

可生成rom.初学者可以看看。很不错的。理解后生成rom很容易的。(LPM_ROM .It is good for VHDL new learner)