TFTP is a simple file transfer protocol using UDP as its transport protocol. This protocol was designed to be small and easy to implement, so it lacks most of the features of a regular FTP. The only thing it can do is read and write files from and to a remote host.
µC/TFTPs is an add-on product to µC/TCP-IP that implements the server part of the TFTP protocol. µC/TFTPs implements part of the following RFCs:
RFC 1350 ftp://ftp.rfc-editor.org/in-notes/rfc1350.txt
RFC 2349 ftp://ftp.rfc-editor.org/in-notes/rfc2349.txt
This document describes how to configure and use the µC/TFTPs module in a µC/TCP-IP and µC/OS-II or µC/OS-III environment.