使用nios的io管脚模拟spi时序对tf卡进行数据读写，同时附带一个简单的用verilog写的在vga显示器上刷屏的代码-Use the io pin of nios to simulate the timing of spi to read&write date from&to tf card, and comes with a simple code written by verilog to refresh the vga monitor.

基于FPGA的MT9M034图像采集显示并存在TF卡是的例程，FPGA和SDRAM完成了RAW图像的采集和转成RGB，并通过VGA显示。NIOS完成了RGB图像存成BMP图像的功能和CMOS的IIC配置-Based on FPGA MT9M034 image acquisition and displayed and TF card is routines, FPGA and SDRAM completed the acquisition of raw image and convert the