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To understand the concepts discussed in this guide, you should be familiar with networking principles, the TCP/IP stack, real-time operating systems, microcontrollers and processors.
Micrium provides sample BSP code free of charge; however, most sample code will likely require modification template BSP files, which should be copied to your project and modified depending on the combination of compiler, processor, board , and device hardware used. However, Micrium might have BSP available for some specific Evaluation board which are not delivered. So before starting to write your own BSP, you can ask Micrium for a working sample code for a MCU, if a sample code is available you could just apply minor modification to be compatible with your compiler and board.