generalize uart driver a bit so it works with SPI
remove LCD code as it now belongs in the oled board.
TX to OLED via "uart" driver
test OLED transmission
s/lcd_/display_
fix SS being backwards?
proper control of SS
fix SS compatibility with SPI when ending a transmit.
Init display before sending.
add tx interrupt
print strings to OLED via SPI
this is actually clearning.
display sensor initials on IR receive