From b063cbba5d32f635e741a87b6afa41377c579318 Mon Sep 17 00:00:00 2001
From: Tobias Weber <webert@hawaii.edu>
Date: Thu, 3 Aug 2017 15:15:04 +0200
Subject: [PATCH] Component to convert hit address to physical pixel position.

---
 mupix/sources/MupixDigiConverter.vhd | 102 +++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 mupix/sources/MupixDigiConverter.vhd

diff --git a/mupix/sources/MupixDigiConverter.vhd b/mupix/sources/MupixDigiConverter.vhd
new file mode 100644
index 0000000..41016d2
--- /dev/null
+++ b/mupix/sources/MupixDigiConverter.vhd
@@ -0,0 +1,102 @@
+----------------------------------------------------------------------------------
+-- Company: University Mainz, AG Fritsch
+-- Engineer: Tobias Weber
+-- 
+-- Create Date:    20:13:03 07/03/2015 
+-- Design Name: 
+-- Module Name:    MupixDigiConverter - Behavioral 
+-- Project Name: 
+-- Target Devices: Hades Trigger and Readout Board v3
+-- Tool versions: 
+-- Description: Module to transform column and row address from 
+--              chip representation to physical column and row.
+-- Dependencies: 
+--
+-- Revision: 
+-- Revision 0.01 - File Created
+-- Additional Comments: 
+--
+----------------------------------------------------------------------------------
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+-- Uncomment the following library declaration if using
+-- arithmetic functions with Signed or Unsigned values
+use IEEE.NUMERIC_STD.ALL;
+
+entity MupixDigiConverter is
+  generic (
+    address_width : integer := 6);
+  port (
+    mupixVersionSel_in : in  std_logic;
+    chipColumn_in      : in  std_logic_vector(address_width - 1 downto 0);
+    chipRow_in         : in  std_logic_vector(address_width - 1 downto 0);
+    physicalColumn_out : out std_logic_vector(address_width - 1 downto 0);
+    physicalRow_out    : out std_logic_vector(address_width - 1 downto 0)); 
+end MupixDigiConverter;
+
+architecture Behavioral of MupixDigiConverter is
+
+signal column_Mupix4_i : unsigned(address_width - 1 downto 0) := (others => '0');
+signal row_Mupix4_i : unsigned(address_width - 1 downto 0) := ( others => '0');
+signal row_tmp_Mupix4_i : unsigned(address_width - 1 downto 0) := (others => '0');
+
+signal column_Mupix6_i : unsigned(address_width - 1 downto 0) := (others => '0');
+signal row_Mupix6_i : unsigned(address_width - 1 downto 0) := ( others => '0');
+signal row_tmp_Mupix6_i : unsigned(address_width - 1 downto 0) := (others => '0');
+
+
+begin
+
+  -- purpose: conversion of addresses for Mupix 4 digital part
+  -- type   : combinational
+  -- inputs : chipColumn_in, chipRow_in
+  Mupix4Convert: process (chipColumn_in, chipRow_in, row_tmp_Mupix4_i) is
+  begin  -- process Mupix4Convert
+    row_tmp_Mupix4_i <= shift_left(unsigned(chipRow_in),1);
+    case chipColumn_in(0) is
+      when '0' =>
+        row_Mupix4_i <= row_tmp_Mupix4_i;
+        column_Mupix4_i <= shift_right(unsigned(chipColumn_in),1);
+      when '1' =>
+        row_Mupix4_i <= row_tmp_Mupix4_i + 1;
+        column_Mupix4_i <= shift_right((unsigned(chipColumn_in) - 1 ),1);
+      when others => null;
+    end case;
+  end process Mupix4Convert;
+
+  -- purpose: conversion of addresses for Mupix 6 digital part
+  -- type   : combinational
+  -- inputs : chipColumn_in, chipRow_in, row_tmp_mupix6_i
+  Mupix6Convert: process (chipColumn_in, chipRow_in, row_tmp_mupix6_i) is
+  begin  -- process Mupix6Convert
+    row_tmp_mupix6_i <= shift_left(unsigned(chipRow_in),1);
+    case chipColumn_in(0) is
+      when '0' =>
+        column_Mupix6_i <= shift_right(unsigned(chipColumn_in),1);
+        if chipRow_in(0) = '1' then
+          row_Mupix6_i <= row_tmp_Mupix6_i - 2;
+        else
+          row_Mupix6_i <= row_tmp_Mupix6_i + 2;
+        end if;
+      when '1' =>
+        row_Mupix6_i <= row_tmp_Mupix6_i + 1;
+        column_Mupix6_i <= shift_right((unsigned(chipColumn_in) - 1 ),1);
+      when others => null;
+    end case;
+  end process Mupix6Convert;
+
+  --Multiplexing of output depending on version
+  with mupixVersionSel_in select
+    physicalRow_out <=
+    std_logic_vector(row_Mupix4_i) when '1',
+    std_logic_vector(row_Mupix6_i) when '0';
+
+  with mupixVersionSel_in select
+    physicalColumn_out <=
+    std_logic_vector(column_Mupix4_i) when '1',
+    std_logic_vector(column_Mupix6_i) when '0';
+  
+  
+end Behavioral;
+
-- 
2.43.0