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/nanoblaze/trunk/Circuit/nanoblaze.vhd
0,0 → 1,157
--##############################################################################
--
-- nanoblaze
-- Top view of the NanoBlaze processor
--
-- The processor is compatible with the Xilinx PicoBlaze
-- <http://www.picoblaze.info>, but different bit widths can be adapted
-- in order to have a larger processor.
--
--------------------------------------------------------------------------------
--
-- Versions / Authors
-- 1.0 Francois Corthay first implementation
--
-- Provided under GNU LGPL licence: <http://www.gnu.org/copyleft/lesser.html>
--
-- by the electronics group of "HES-SO//Valais Wallis", in Switzerland:
-- <http://www.hevs.ch/en/rad-instituts/institut-systemes-industriels/>.
--
--------------------------------------------------------------------------------
--
-- Usage
-- Set the proper values for all generics.
--
-- Edit an assembler file and compile it as the architecture of "programRom".
--
-- The "reset" signal is active high.
--
--------------------------------------------------------------------------------
--
-- Synthesis results
-- A circuit compatible with the PicoBlaze sizes gives the following
-- synthesis result on a Xilinx Spartan3-1000:
-- Number of Slice Flip Flops: 157 out of 15,360 1%
-- Number of 4 input LUTs: 446 out of 15,360 2%
-- Number of BRAMs: 1 out of 24 4%
--
--##############################################################################
 
LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.numeric_std.all;
 
ENTITY nanoBlaze IS
GENERIC(
addressBitNb : positive := 8;
registerBitNb : positive := 8;
programCounterBitNb : positive := 10;
stackPointerBitNb : positive := 5;
registerAddressBitNb : positive := 4;
scratchpadAddressBitNb : natural := 6
);
PORT(
reset : IN std_ulogic;
clock : IN std_ulogic;
en : IN std_ulogic;
dataAddress : OUT unsigned(addressBitNb-1 DOWNTO 0);
dataOut : OUT std_ulogic_vector(registerBitNb-1 DOWNTO 0);
dataIn : IN std_ulogic_vector(registerBitNb-1 DOWNTO 0);
readStrobe : OUT std_uLogic;
writeStrobe : OUT std_uLogic;
int : IN std_uLogic;
intAck : OUT std_ulogic
);
END nanoBlaze ;
 
--==============================================================================
 
ARCHITECTURE struct OF nanoBlaze IS
 
constant instructionBitNb: positive := 18;
SIGNAL instruction : std_ulogic_vector(instructionBitNb-1 DOWNTO 0);
SIGNAL logic1 : std_ulogic;
SIGNAL programCounter : unsigned(programCounterBitNb-1 DOWNTO 0);
 
COMPONENT nanoProcessor
GENERIC (
addressBitNb : positive := 8;
registerBitNb : positive := 8;
registerAddressBitNb : positive := 4;
programCounterBitNb : positive := 10;
stackPointerBitNb : positive := 5;
instructionBitNb : positive := 18;
scratchpadAddressBitNb : natural := 4
);
PORT (
reset : IN std_uLogic;
clock : IN std_uLogic;
en : IN std_uLogic;
progCounter : OUT unsigned(programCounterBitNb-1 DOWNTO 0);
instruction : IN std_ulogic_vector(instructionBitNb-1 DOWNTO 0);
dataAddress : OUT unsigned(addressBitNb-1 DOWNTO 0);
dataOut : OUT std_ulogic_vector(registerBitNb-1 DOWNTO 0);
dataIn : IN std_ulogic_vector(registerBitNb-1 DOWNTO 0);
readStrobe : OUT std_uLogic;
writeStrobe : OUT std_uLogic;
int : IN std_uLogic;
intAck : OUT std_ulogic
);
END COMPONENT;
 
COMPONENT programRom
GENERIC (
addressBitNb : positive := 8;
dataBitNb : positive := 8
);
PORT (
reset : IN std_uLogic;
clock : IN std_uLogic;
en : IN std_uLogic;
address : IN unsigned(addressBitNb-1 DOWNTO 0);
dataOut : OUT std_ulogic_vector(dataBitNb-1 DOWNTO 0)
);
END COMPONENT;
 
BEGIN
logic1 <= '1';
 
I_up : nanoProcessor
GENERIC MAP (
addressBitNb => addressBitNb,
registerBitNb => registerBitNb,
registerAddressBitNb => registerAddressBitNb,
programCounterBitNb => programCounterBitNb,
stackPointerBitNb => stackPointerBitNb,
instructionBitNb => instructionBitNb,
scratchpadAddressBitNb => scratchpadAddressBitNb
)
PORT MAP (
reset => reset,
clock => clock,
en => en,
progCounter => programCounter,
instruction => instruction,
dataAddress => dataAddress,
dataOut => dataOut,
dataIn => dataIn,
readStrobe => readStrobe,
writeStrobe => writeStrobe,
int => int,
intAck => intAck
);
 
I_rom : programRom
GENERIC MAP (
addressBitNb => programCounterBitNb,
dataBitNb => instructionBitNb
)
PORT MAP (
reset => reset,
clock => clock,
en => logic1,
address => programCounter,
dataOut => instruction
);
 
END ARCHITECTURE struct;
nanoblaze/trunk/Circuit/nanoblaze.vhd Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property

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