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[raggedstone] / dhwk / source / fifo_io_control.vhd
diff --git a/dhwk/source/fifo_io_control.vhd b/dhwk/source/fifo_io_control.vhd
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--- $Id: fifo_io_control.vhd,v 1.3 2007-03-11 08:44:31 sithglan Exp $
-
-library IEEE;
-use IEEE.std_logic_1164.all;
-
-entity FIFO_IO_CONTROL is
-        port
-        (
-                PCI_CLOCK :in std_logic;
-                WRITE_XX1_0 :in std_logic; -- PCI Write
-                FIFO_RDn :in std_logic; -- FIFO Read (low active)
-                RESET :in std_logic;
-                SYNC_FLAG_1 :in std_logic; -- Recv FIFO Empty (low active)
-                SYNC_FLAG_7 :in std_logic; -- Send FIFO Full (low active)
-                S_FIFO_RESETn :out std_logic; -- Send FIFO Reset (low active)
-                R_FIFO_RESETn :out std_logic; -- Recv FIFO Reset (low active)
-                S_FIFO_WRITEn :out std_logic; -- Send FIFO Write (low active)
-                R_FIFO_READn :out std_logic; -- Recv FIFO Read (low active)
-                S_FIFO_RETRANSMITn :out std_logic; -- Send FIFO Retransmit (low active)
-                R_FIFO_RETRANSMITn :out std_logic; -- Recv FIFO Retransmit (low active)
-                S_ERROR :out std_logic; -- Send ERROR
-                R_ERROR :out std_logic; -- Recv ERROR
-                SR_ERROR :out std_logic -- Send / Recv Error
-        );
-end entity FIFO_IO_CONTROL;
-
-architecture FIFO_IO_CONTROL_DESIGN of FIFO_IO_CONTROL is
-
-        signal SIG_S_ERROR :std_logic; -- Send Error
-        signal SIG_R_ERROR :std_logic; -- Recv Error
-
-begin
-
- -- FIFO Write
-
-        process (PCI_CLOCK)
-        begin
-                if (PCI_CLOCK'event and PCI_CLOCK = '1') then
-                        if (RESET = '1') then
-                                S_FIFO_WRITEn <= '1';
-                                SIG_S_ERROR <= '0';
-
-                        elsif (WRITE_XX1_0 = '0') then
-                                S_FIFO_WRITEn <= '1';
-
-                        elsif (WRITE_XX1_0 = '1') then
-                                if (SYNC_FLAG_7 = '0') then
-                                        SIG_S_ERROR <= '1';
-
-                                elsif (SYNC_FLAG_7 = '1') then
-                                        S_FIFO_WRITEn <= '0';
-                                        SIG_S_ERROR <= '0';
-                                end if;
-                        end if;
-                end if;
-        end process;
-
-        S_ERROR <= SIG_S_ERROR;
-
- -- FIFO Read
-
-        R_FIFO_READn <= FIFO_RDn;
-
--- Receive Error
-
-        process (PCI_CLOCK)
-        begin
-                if (PCI_CLOCK'event and PCI_CLOCK ='1') then
-                        if (RESET = '1') then
-                                SIG_R_ERROR <= '0';
-
-                        elsif (FIFO_RDn = '0' and SYNC_FLAG_1 = '0') then
-                                SIG_R_ERROR <= '1';
-                        end if;
-                end if;
-        end process;
-
-        R_ERROR <= SIG_R_ERROR;
-
--- Send or Receive Error
-
-        process (PCI_CLOCK)
-        begin
-                if (PCI_CLOCK'event and PCI_CLOCK ='1') then
-                        SR_ERROR <= SIG_S_ERROR or SIG_R_ERROR;
-                end if;
-        end process;
-
--- FIFO Reset
-
-        process (PCI_CLOCK)
-        begin
-                if (PCI_CLOCK'event and PCI_CLOCK ='1') then
-                        S_FIFO_RESETn <= not RESET;
-                        R_FIFO_RESETn <= not RESET;
-                end if;
-        end process;
-
-
--- FIFO Retransmit
-
-        process (PCI_CLOCK)
-        begin
-                if (PCI_CLOCK'event and PCI_CLOCK ='1') then
-                        S_FIFO_RETRANSMITn <= '1';
-                        R_FIFO_RETRANSMITn <= '1';
-                end if;
-        end process;
-
-end architecture FIFO_IO_CONTROL_DESIGN;
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