环形缓冲区，适用于接收外部数据时用作缓冲 STM32 QUEUE_DATA_TYPE* cbWrite(QueueBuffer *cb); QUEUE_DATA_TYPE* cbRead(QueueBuffer *cb); void cbReadFinish(QueueBuffer *cb); void cbWriteFinish(QueueBuffer *cb); //void cbPrint(QueueBuffer *cb); QUEUE_DATA_TYPE* cbWriteUsing(QueueBuffer *cb) ; int cbIsFull(QueueBuffer *cb) ;