UDA1431 语音芯片的驱动源码及测试程序。在s3c2440开发板linux2.6内核实现语音双工。使用方法：在内核源码中找到相应的C源文件替换即可。压缩包内有语音同时输入输出的测试程序。-Voice chip UDA1431 driver source code and testing procedures. S3C2440 development board in linux2.6 core duplex voice. Usage: In the kernel source code found in the corresponding C source file can be replaced. Compressed packet voice input and output at the same time of the test procedure.