Play device logo animation.
The logo command causes the co-processor engine to play back a short animation of the FTDI logo.
During logo playback the MCU should not access any FT800 resources. After 2.5 seconds have elapsed, the co-processor
engine writes zero to REG_CMD_READ and REG_CMD_WRITE, and starts waiting for commands. After this command is complete,
the MCU shall write the next command to the starting address of RAM_CMD.
' see it working - FT800 Gauges.bas, FT800 Keyboard.bas, FT800 Signals.bas and FT800 Sketch.bas