Add complex demo

The demo contains rotating LED controlled by FSM for DOUT demonstration,
switching of the direction of the rotation by button for DIN demonstration,\
simulation of the button by a CAN message for CAN RX demonstration,
Sending the LED state as a CAN message to demonstrate CAN TX,
some printing on the Serial Interface.

diff --git a/rpp/demos/demo_board.slx b/rpp/demos/demo_board.slx
new file mode 100644 (file)
index 0000000..5a4b6b3
Binary files /dev/null and b/rpp/demos/demo_board.slx differ