A 7 / 8 segment display is used to display digits 0-9. Here we attempt to have the complete alphabet displayed A-Z. Use these binary 0 and 1 to switch the LED in the 7 segment display. The 8th bit is the dot '.'. To change the coding, look up the segment names a,b,c,d,e,f,g and their order.
B01011111,//@ 0
B01110111,//A 1
B01111100,//B 2