## Copyright (C) 2017 Jens Ahrensfeld
## 
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or
## (at your option) any later version.
## 
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
## 
## You should have received a copy of the GNU General Public License
## along with this program.  If not, see <http://www.gnu.org/licenses/>.

## -*- texinfo -*- 
## @deftypefn {Function File} {@var{retval} =} adc_eval (@var{input1}, @var{input2})
##
## @seealso{}
## @end deftypefn

## Author: Jens Ahrensfeld <ahrensfeld@w2ess001vm>
## Created: 2017-03-07

function [output] = adc_eval (nbits, input)

Vref = 1.0;
%output = adc_pipelined(Vref, nbits, input)
output = adc_SAR(Vref, nbits, input)


function output = adc_pipelined(VRref, nbits, input)
	output = zeros(1, nbits);
	for n=1:nbits,
		if input >= Vref/2
			output(n) = 1;
			input = input - Vref/2
		end
		input = input * 2
	end
	
function output = adc_SAR(VRref, nbits, input)
	Vsar = 0;
	VStep = VRref/2
	output = zeros(1, nbits);
	for n=1:nbits,
		if input >= (Vsar + VStep)
			output(n) = 1
			Vsar = Vsar + VStep;
		end
		VStep = VStep / 2;
	end