实验程序通过调用BSL提供的函数，设置和控制DM642-PCI板上AIC23编码解码模块，实现输出1KHz的正弦波形输出，持续约5秒钟。-Experimental procedure provided by calling BSL function, set and control the DM642-PCI board AIC23 codec module, to achieve output 1KHz sine wave shaped output, lasted about 5 secon