利用stm32f407作为测试板，利用IO和精确的延时（这个延时方式任意）来模拟FIFO时序来达到和FPGA的FIFO模块进行通信。测试时用的是Altera的FPGA的FIFO模块。-Stm32f407 use as a test board, the use of IO and accurate delay (the delay in any way) to simulate FIFO timing to achieve and FPGA FIFO module to communicate.