基于 STM32 PCM语音编/解码代码，代替硬件录播IC,Based on the STM32 PCM voice encoder/decoder code, instead of recording and broadcasting hardware IC

AT91SAM7S64处理器的USB驱动、AD驱动、Flash驱动的项目源代码，并且添加了PCM实时编码代码，实现了实时录音与U盘功能。-USB drive AT91SAM7S64 processor, AD-driven, Flash-driven project source code, and added a real-time encoder PCM code, realize the real-time recording and U disk function.