TFTP using FreeRTOS+FAT SL and lwIP

Hello. Is there anybody who developed tftp using FreeRTOS FAT SL? I’ve tested a file system(FAT SL) and an UDP communication using lwIP stack in my system, then I found simple tftp code using lwIP in TI StellarisWare demo. But it use another file system, so I need to port it to FAT SL. It is not easy.. Is there a better way to develop tftp using ‘FAT SL’? Best Regards. Wonjae