free rtos BSP for lpc 1769

we are working on an academic project : Writing a BSP for lpc 1769 on the baseboard OM13016,598
So far we have studied the already given BSP for lpc 1769  (for UART,SSP and I2C) from free rtos website and are planning to extend the BSP for the other peripherals.Can anyone reply what should be the most important peripherals other than the above mentioned for which we need to write the BSP.
Reply a.s.a.p

free rtos BSP for lpc 1769

USB, and maybe MMC.