并行输入，串行输出模块，输入的位宽在1--16位可变，包括测试平台，自己写的，绝对可用，已经通过modelsim仿真。-Parallel input, serial output module, the input bit-width of 1- 16-bit variable, including the test platform, write your own, absolutely free, Has passed the modelsim simulation.