dsp的sport口连接数字mic 441，并把采集的数据保存至文本-DSP sport port connect with digital MIC 441,and save the data to a file

实现最小二乘法的基本计算功能 可实现数据从文件直接调用 并可直接输出显示或保存为其他格式文本-Least-squares method to achieve the basic computing functions can be called directly from the file data and direct output to display or save the text to other formats