how to convert input dc voltage to hexa decimal

[suvaraj]

hi to all
i'm using pic pic16f877a with ccs c compiler.inn my project i have a two pin level sensor and it has 4 different o/p's for eg level1 reached means it's o/p 1.1v,level2 reached means it's o/p 2.1v,level3reached means it's o/p 3v,level4 reached means it's o/p 4.2v .how to i convert this voltage to hexadecimal value.?and i need level 1 hexadecimal value reached means i display one led,etc...., i'm use pin RA0 for adc input .pls help me

thanks to all

 

[btbass]

If you are using the supply voltage as your A/D reference.
Then its a 10-bit converter, so the resolution is:

5/1024

So 1.1 volt is 1.1 / (5/1024) = 225.28 = Rounded 0xe1.
So 2.1 volt is 2.1 / (5/1024) = 430.08 = Rounded 0x1ae.
etc.