韩福柱老师FPGA实验源码，用vhdl语言在xilinx FPGA上实现，包括ad采集，温度传感器读取，秒表，跑马灯和按键次数统计4个实验-Han Fu teacher FPGA column experiment source code, vhdl languages on xilinx FPGA implementations, including ad acquisition, temperature sensor readings, stopwatch, marquees and key