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[/] [copyblaze/] [trunk/] [copyblaze/] [rtl/] [vhdl/] [cpu/] [cp_ScratchPad.vhd] - Rev 57
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-------------------------------------------------------------------------------- -- Company: -- -- File: cp_ScratchPad.vhd -- -- Description: -- projet copyblaze -- Scratch Pad Memory -- -- File history: -- v1.0: 10/10/11: Creation -- -- Targeted device: ProAsic A3P250 VQFP100 -- Author: AbdAllah Meziti -------------------------------------------------------------------------------- library ieee; use ieee.std_logic_1164.all; use ieee.numeric_std.all; use work.Usefull_Pkg.all; -- Usefull Package -------------------------------------------------------------------------------- -- Entity: cp_ScratchPad -- -- Description: -- -- REMARQUE: -- -- -- History: -- 10/10/11 AM: Creation -- --------------------- -- xx/xx/xx AM: -- -------------------------------------------------------------------------------- entity cp_ScratchPad is generic ( GEN_WIDTH_DATA : positive := 8; GEN_DEPTH_SCRATCH : positive := 64 ); port ( -------------------------------------------------------------------------------- -- Signaux Systeme -------------------------------------------------------------------------------- Clk_i : in std_ulogic; -- signal d'horloge générale Rst_i_n : in std_ulogic; -- signal de reset générale -------------------------------------------------------------------------------- -- Signaux Fonctionels -------------------------------------------------------------------------------- Ptr_i : in std_ulogic_vector(log2(GEN_DEPTH_SCRATCH)-1 downto 0); Write_i : in std_ulogic; Data_i : in std_ulogic_vector(GEN_WIDTH_DATA-1 downto 0); -- Data_o : out std_ulogic_vector(GEN_WIDTH_DATA-1 downto 0) ); end cp_ScratchPad; -------------------------------------------------------------------------------- -- Architecture: RTL -- of entity : cp_ScratchPad -------------------------------------------------------------------------------- architecture rtl of cp_ScratchPad is -------------------------------------------------------------------------------- -- Définition des fonctions -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- -- Définition des constantes -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- -- Définition des signaux interne -------------------------------------------------------------------------------- type RAM_TYPE is array (0 to GEN_DEPTH_SCRATCH-1) of std_ulogic_vector(GEN_WIDTH_DATA-1 downto 0); signal iScratchPadMem : RAM_TYPE; -------------------------------------------------------------------------------- -- Déclaration des composants -------------------------------------------------------------------------------- begin -------------------------------------------------------------------------------- -- Process : ScratchPad_Proc -- Description: ScratchPad Memory -------------------------------------------------------------------------------- ScratchPad_Proc : process(Rst_i_n, Clk_i) begin if ( Rst_i_n = '0' ) then for i in 0 to GEN_DEPTH_SCRATCH-1 loop iScratchPadMem(i) <= (others=>'0'); end loop; elsif ( rising_edge(Clk_i) ) then if ( Write_i = '1' ) then iScratchPadMem( to_integer(unsigned(Ptr_i)) ) <= Data_i; end if; end if; end process ScratchPad_Proc; Data_o <= iScratchPadMem( to_integer(unsigned(Ptr_i)) ); end rtl;