ADC multiplex with 4051

[rmteo]

Use an inner and outer loop.

for i = 1 to 2
  for j = 0 to 7
    PORTC = j+(i*8)  'PORTC4:3 selects the multiplexer
                     'PORTC2:0 selects the channel
    ' Read ADC here into AD[j+((i-1)*8)]
  next j
next i