Function: hex2byte

CALL:

bytevalues = hex2byte(hexcode)

DESCRIPTION:

Convert hexadecimal string to byte.

INPUT:

hexcode char[N,2] 
hexadecimal code matrix
    byteData is char array with elements in the range
    0123456789ABCDEF.

OUTPUT:

u uint8[N,1] 
Corresponding uint8 value

 00==>0
 01==>1
 ..
 10==>16
 ..
 ..
 11==>256