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[Krobot-resources] [SCM] UNNAMED PROJECT branch, master, updated. 42a764ec6bb089a794a4a4cd2a88e8af5ca67fb6
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From: Xavier L. <Sup...@us...> - 2010-01-15 23:40:51
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- Log -----------------------------------------------------------------
commit 42a764ec6bb089a794a4a4cd2a88e8af5ca67fb6
Author: Xavier Lagorce <Xav...@cr...>
Date: Sat Jan 16 00:40:24 2010 +0100
Ajout d'un decodeur BCD vers 7 segments (+ point décimal)
-----------------------------------------------------------------------
Changes:
diff --git a/fpga/components/decoder_7seg.vhd b/fpga/components/decoder_7seg.vhd
new file mode 100644
index 0000000..dcf698b
--- /dev/null
+++ b/fpga/components/decoder_7seg.vhd
@@ -0,0 +1,162 @@
+----------------------------------------------------------------------------------
+-- Create Date: 15/01/2010
+-- Module Name: decoder_7seg
+-- Authors : X. Lagorce
+-- Description: Decodes a BCD value into its representation on a 7 segments
+-- diplay
+--
+-- Dependencies: /
+--
+-- Revision:
+-- Revision 0.1 : First implementation
+-- Additional Comments:
+--
+----------------------------------------------------------------------------------
+
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.STD_LOGIC_ARITH.ALL;
+use IEEE.STD_LOGIC_UNSIGNED.ALL;
+
+entity decoder_7seg is
+ port(val : in std_logic_vector(3 downto 0);
+ pti : in std_logic;
+ a : out std_logic;
+ b : out std_logic;
+ c : out std_logic;
+ d : out std_logic;
+ e : out std_logic;
+ f : out std_logic;
+ g : out std_logic;
+ pt : out std_logic
+ );
+end decoder_7seg;
+
+architecture hexa_dec of decoder_7seg is
+begin
+ process(val, pti)
+ begin
+ case val is
+ when "0000" => a <= '1'; -- 0
+ b <= '1';
+ c <= '1';
+ d <= '1';
+ e <= '1';
+ f <= '1';
+ g <= '0';
+ when "0001" => a <= '0'; -- 1
+ b <= '1';
+ c <= '1';
+ d <= '0';
+ e <= '0';
+ f <= '0';
+ g <= '0';
+ when "0010" => a <= '1'; -- 2
+ b <= '1';
+ c <= '0';
+ d <= '1';
+ e <= '1';
+ f <= '0';
+ g <= '1';
+ when "0011" => a <= '1'; -- 3
+ b <= '1';
+ c <= '1';
+ d <= '1';
+ e <= '0';
+ f <= '0';
+ g <= '1';
+ when "0100" => a <= '0'; -- 4
+ b <= '1';
+ c <= '1';
+ d <= '0';
+ e <= '0';
+ f <= '1';
+ g <= '1';
+ when "0101" => a <= '1'; -- 5
+ b <= '0';
+ c <= '1';
+ d <= '1';
+ e <= '0';
+ f <= '1';
+ g <= '1';
+ when "0110" => a <= '1'; -- 6
+ b <= '0';
+ c <= '1';
+ d <= '1';
+ e <= '1';
+ f <= '1';
+ g <= '1';
+ when "0111" => a <= '1'; -- 7
+ b <= '1';
+ c <= '1';
+ d <= '0';
+ e <= '0';
+ f <= '0';
+ g <= '0';
+ when "1000" => a <= '1'; -- 8
+ b <= '1';
+ c <= '1';
+ d <= '1';
+ e <= '1';
+ f <= '1';
+ g <= '1';
+ when "1001" => a <= '1'; -- 9
+ b <= '1';
+ c <= '1';
+ d <= '1';
+ e <= '0';
+ f <= '1';
+ g <= '1';
+ when "1010" => a <= '1'; -- A
+ b <= '1';
+ c <= '1';
+ d <= '0';
+ e <= '1';
+ f <= '1';
+ g <= '1';
+ when "1011" => a <= '0'; -- B
+ b <= '0';
+ c <= '1';
+ d <= '1';
+ e <= '1';
+ f <= '1';
+ g <= '1';
+ when "1100" => a <= '1'; -- C
+ b <= '0';
+ c <= '0';
+ d <= '1';
+ e <= '1';
+ f <= '1';
+ g <= '0';
+ when "1101" => a <= '0'; -- D
+ b <= '1';
+ c <= '1';
+ d <= '1';
+ e <= '1';
+ f <= '0';
+ g <= '1';
+ when "1110" => a <= '1'; -- E
+ b <= '0';
+ c <= '0';
+ d <= '1';
+ e <= '1';
+ f <= '1';
+ g <= '1';
+ when "1111" => a <= '1'; -- F
+ b <= '0';
+ c <= '0';
+ d <= '0';
+ e <= '1';
+ f <= '1';
+ g <= '1';
+ when others => a <= '0'; -- shouldn't happen
+ b <= '0';
+ c <= '0';
+ d <= '0';
+ e <= '0';
+ f <= '0';
+ g <= '0';
+ end case;
+ end process;
+ pt <= pti;
+end hexa_dec;
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UNNAMED PROJECT
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