Filter Wizard: determine the correct DAC divider value for generated filters

Previously it was assigning only static values for Tx instead of basing
the Tx DAC divider value off the ADC rate. Now we still assign static
values in cook_input (since it's currently a standalone design so the Tx
design doesn't know about the Rx values) but the values are sanity
checked and altered along with the PLL multiplier if they need to be
changed.

Signed-off-by: Tim Harder <timothy.harder@analog.com>

Author: Tim Harder

AD9361_Filter_Wizard/AD9361_Filter_Wizard.m

@@ -182,6 +182,27 @@ function AD9361_Filter_Wizard_OpeningFcn(hObject, eventdata, handles, varargin)
     end
 end
 
+% sanity check the DAC divider value and alter it if necessary, note that if
+% it's altered then the PLL and calibration dividers must be updated as well
+if isfield(handles, 'input_tx') && isfield(handles, 'input_rx')
+    ADC_rate = handles.input_rx.Rdata * handles.input_rx.FIR * ...
+        handles.input_rx.HB1 * handles.input_rx.HB2 * handles.input_rx.HB3;
+    DAC_rate = handles.input_tx.Rdata * handles.input_tx.FIR * ...
+        handles.input_tx.HB1 * handles.input_tx.HB2 * handles.input_tx.HB3;
+    DAC_div = ADC_rate / DAC_rate;
+    if ~(handles.input_tx.DAC_div == DAC_div)
+        handles.input_tx.DAC_div = DAC_div;
+        handles.input_tx.PLL_mult = fastest_FIR([64 32 16 8 4 2 1], ...
+            handles.MAX_BBPLL_FREQ, handles.MIN_BBPLL_FREQ, ...
+            handles.input_tx.Rdata * handles.input_tx.FIR * handles.input_tx.HB1 * ...
+            handles.input_tx.HB2 * handles.input_tx.HB3 * handles.input_tx.DAC_div);
+        filter_type = get(handles.filter_type, 'Value');
+        set(handles.filter_type, 'Value', 0);
+        handles.input_tx.caldiv = default_caldiv(handles);
+        set(handles.filter_type, 'Value', filter_type);
+    end
+end
+
 if isfield(handles, 'input_tx') || isfield(handles, 'input_rx')
     set(handles.store_filter, 'Visible', 'off');
     guidata(hObject, handles);

AD9361_Filter_Wizard/cook_input.m

@@ -108,7 +108,6 @@
 
 if strcmp(input.RxTx, 'Rx')
     max_HB = max.MAX_RX;
-    input.DAC_div = 1;
 else
     max_HB = max.MAX_TX;
 end
@@ -149,7 +148,9 @@
         input.HB1 = fastest_FIR([2 1], max_HB.HB1, 0, input.Rdata * input.FIR);
         input.HB2 = fastest_FIR([2 1], max_HB.HB2, 0, input.Rdata * input.FIR * input.HB1);
         input.HB3 = fastest_FIR([3 2 1], max_HB.HB3, 0, input.Rdata * input.FIR * input.HB1 * input.HB2);
-        if strcmp(input.RxTx, 'Tx')
+        if strcmp(input.RxTx, 'Rx')
+            input.DAC_div = 1;
+        else
             input.DAC_div = 2;
         end
         input.PLL_mult = fastest_FIR([64 32 16 8 4 2 1], max.MAX_BBPLL_FREQ, max.MIN_BBPLL_FREQ, input.Rdata * input.FIR * input.HB1 * input.HB2 * input.HB3 * input.DAC_div);
@@ -206,14 +207,6 @@
 
 cooked = input;
 
-function rate = fastest_FIR(rates, max, min, mult)
-for i = 1:length(rates)
-    if max >= mult * rates(i) && min <= mult * rates(i)
-        break;
-    end
-end
-rate = rates(i);
-
 function caldiv = default_caldiv(input)
 if strcmp(input.RxTx, 'Rx')
     wnom = 1.4 * input.Fstop; % Rx

AD9361_Filter_Wizard/fastest_FIR.m

@@ -0,0 +1,43 @@
+%%
+% Copyright 2015(c) Analog Devices, Inc.
+%
+%  All rights reserved.
+%
+%  Redistribution and use in source and binary forms, with or without modification,
+%  are permitted provided that the following conditions are met:
+%      - Redistributions of source code must retain the above copyright
+%        notice, this list of conditions and the following disclaimer.
+%      - Redistributions in binary form must reproduce the above copyright
+%        notice, this list of conditions and the following disclaimer in
+%        the documentation and/or other materials provided with the
+%        distribution.
+%      - Neither the name of Analog Devices, Inc. nor the names of its
+%        contributors may be used to endorse or promote products derived
+%        from this software without specific prior written permission.
+%      - The use of this software may or may not infringe the patent rights
+%        of one or more patent holders.  This license does not release you
+%        from the requirement that you obtain separate licenses from these
+%        patent holders to use this software.
+%      - Use of the software either in source or binary form or filter designs
+%        resulting from the use of this software, must be connected to, run
+%        on or loaded to an Analog Devices Inc. component.
+%
+%  THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+%  INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
+%  PARTICULAR PURPOSE ARE DISCLAIMED.
+%
+%  IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+%  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY
+%  RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+%  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+%  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+%  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+%%
+
+function rate = fastest_FIR(rates, max, min, mult)
+for i = 1:length(rates)
+    if max >= mult * rates(i) && min <= mult * rates(i)
+        break;
+    end
+end
+rate = rates(i);