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Configurable Hamming Generator: Overview Details Name: hamming_gen Created: 27-Oct-2006 22:55:27 Updated: 21-Aug-2007 18:28:00 CVS: no files in cvs Other project properties Category :: ECC core Language :: VHDL License :: GPL Development status :: Production/Stable Project maintainers Alexandre Amory ghanashyam prabhu Statistics view Opened bugs project has opened bugs Description This C++ program generates VHDL package with hamming encoder and decoder. It also generates a simple testbench that can be used to evaluate the generated Hamming code. my email is ale_amory@o... Features It is a easy to use command-line program HammingGen <SEC/SEC-DED> <data width> <project_name> It generates two types of Hamming code SEC - Single Error Correction SEC-DED - Single Error Correction and Dual Error Detection It is easy to modify the original design Examples Generated Code for a Hamming SEC with 32 bits FUNCTION hamming_encoder_32bit(data_in:data_ham_32bit) RETURN parity_ham_32bit; FUNCTION hamming_decoder_32bit(data_parity_in:coded_ham_32bit) RETURN data_ham_32bit; Consider the folowing resgister description library ieee; use ieee.std_logic_1164.all; entity test is port ( datain : in std_logic_vector(15 downto 0); clock : in std_logic; dataout : out std_logic_vector(15 downto 0); error : out std_logic_vector(1 downto 0) ); end entity; architecture test of test is signal temp : std_logic_vector(15 downto 0); begin process(clock) begin if (clock'event and clock='1') then temp <= datain; end if; end process; dataout <= temp; end architecture; The fault-tolerant version of this code is: library ieee; use ieee.std_logic_1164.all; use WORK.hamm_package_16bit.all; entity test is port ( datain : in std_logic_vector(15 downto 0); clock : in std_logic; dataout : out std_logic_vector(15 downto 0); error : out std_logic_vector(1 downto 0) ); end entity; architecture test of test is signal temp : coded_ham_16bit; begin process(clock) begin if (clock'event and clock='1') then temp <= datain & hamming_encoder_16bit(datain); end if; end process; dataout <= hamming_decoder_16bit(temp); end architecture; Future Features Support correction of more than one faults