Support FAST Segment Displays

[jabdoa2]

Implement segment_display_platform interface for the FAST platform.

Segment Displays
14 SEGMENT DISPLAY
PS:<ADDRESS>,<DATA>,<DATA>...<CR>
<ADDRESS>
sends individual segment data to display starting at supplied address
address starts at player 1 most significant digit and continues to each digit and the continues to player 2...
<DATA>
the 2 bytes are segment a,b,c,d,e,f,g,h,i,j,k,l,m,n,dp,comma.  Segment a is MSB
ASCII DATA DISPLAY
PA:
Same as PS commands, but ascii data is set directly to the display instead of segment data
Example(s):
PA:1,TEST<CR>
This will write the word “test” on the first line of the first display.