说明： BSP是板级支持包，是介于主板硬件和操作系统之间的一层，应该说是属于操作系统的一部分,主要目的是为了支持操作系统，使之能够更好的运行于硬件主板 (BSP is a board-level support package is between the motherboard between the hardware and operating system layer, it should be said is part of the operating system, the main purpose is to support the operating system, to enable them to better run on the hardware motherboard)
