Network programming with mac-adress

Hello

I have to make an connection to a FPGA-borad.

http://www.celoxica.com/products/rc300/default.asp

This board only supports ethernet communication with the mac-layer. Now I have to build an app that can send data(in my case images) to the board.

My question is now how can i send data using the mac-layer only.
I do not think that we are using a router/switch between the pc and the board, we will use an pachted-ethernet-cable.

Sorry i think i posted this one in the wrong thrad. soory

Thanks for the help

Roggey