伪随机序列发生器的vhdl算法 设计一个伪随机序列发生器，采用的生成多项式为1+X^3+X^7。要求具有一个RESET端和两个控制端来调整寄存器初值（程序中设定好四种非零初值可选）--Design of VHDL algorithm for pseudo random sequence generator is a pseudorandom sequence generator, using the generating polynomial 1+X^3+X^7. RESET has a client request and the two control registers client to adjust the initial value (procedures set of four non- zero initial value optional)