The sections that follow describe the interactions between the IF layer, the wireless device driver API functions, the BSP API functions and the Wireless Manager API functions. Since the device driver is made of not only logic but also from interactions with the parts on the board, you'll need to understand the calls made to the these layers of the µC/TCP-IP module and to the CPU and board-dependent layers.
The figure below shows the logical path between the Wireless Manager layer, BSP APIs functions and the device driver through the function calls and interruptions.