下午5点的代码及说明，verilog代码，几乎所有的IC面试都会问…

说明：  SDRAM控制，通过VHDL语言编写可运行至133MHz。(SDRAM control, written in VHDL language, can run to 133MHz.)

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.)

ISE7.1，采用VIRTEX-II芯片。实现adc数据采样，平均，通道选择，采样时钟选择，数据格式调整，内含fifo,uart等模块。-ISE7.1, using VIRTEX-II chip. Adc realize data sampling, on average, channel selection, the sampling clock select, adjust data formats, including fifo, uart modules.

最近交互式电源技术，软交换、同步整流、频率固定(Alternating expressions Power technology recently、Softswitch, synchronous rectification, fixed frequency)

用case 语句描述的4 选1 Mux 源码程序，好用(-4 with a case statement described 1 Mux source program, easy to use)

USB转RS232RSTTLRS485FT232+SP213串口的原理图AD画的(USB to RS232RSTTLRS485FT232+SP213 serial port schematic AD drawing)

AMBA总线的AHB+APB源程序，供初学者学习。(Verilog for AHB and APB)

说明：  一种基于FPGA的调频连续波方位向多通道 FMCW SAR的实时成像信号处理方法及FPGA，包 括：步骤一、计算重构矩阵；步骤二、重构方位向 多通道数据，包括：步骤2 .1、对各个通道的回波 数据沿方位向分别间隔补零，并进行方位向傅里 叶变换；步骤2 .2、将方位向傅里叶变换之后各个 通道方位向相同位置的点组合为一个向量并与 重构矩阵相乘，得到重构完成的方位向数据；(An azimuth multichannel FMCW based on FPGA FMCW SAR real-time imaging signal processing method and FPGA, package Including: Step 1: calculate the reconstruction matrix; step 2: reconstruct the orientation Multichannel data, including: step 2.1, echo of each channel The data is compensated with zero along the azimuth direction respectively, and the azimuth Fourier is carried out Step 2.2, after the azimuth Fourier transform The points of the same position in the channel azimuth are combined into a vector and are connected withThe reconstruction matrix is multiplied to get the reconstructed azimuth data Step 2.3. Repeat step 2.3 for the data of different distance gates)

通过监测工作状态实现带有IIC通讯功能的数据发送接收(to implement the sending and receiving data function of iic communication )

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