自己写的二进制补码转十进制有符号数的转换程序，程序虽小但很实用，可用作测试fpga的借口程序，已经过测试没有问题。-Twos complement to write their own turn decimal number of symbols of the conversion program, the program is small but very practical excuse can be used as a test fpga program has been tested and there is no problem.