diff options
Diffstat (limited to 'testsuite/vests/vhdl-ams/ashenden/compliant/packages/bus_sequencer-1.vhd')
-rw-r--r-- | testsuite/vests/vhdl-ams/ashenden/compliant/packages/bus_sequencer-1.vhd | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/packages/bus_sequencer-1.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/packages/bus_sequencer-1.vhd new file mode 100644 index 000000000..fda35f289 --- /dev/null +++ b/testsuite/vests/vhdl-ams/ashenden/compliant/packages/bus_sequencer-1.vhd @@ -0,0 +1,79 @@ + +-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc + +-- This file is part of VESTs (Vhdl tESTs). + +-- VESTs is free software; you can redistribute it and/or modify it +-- under the terms of the GNU General Public License as published by the +-- Free Software Foundation; either version 2 of the License, or (at +-- your option) any later version. + +-- VESTs is distributed in the hope that it will be useful, but WITHOUT +-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +-- for more details. + +-- You should have received a copy of the GNU General Public License +-- along with VESTs; if not, write to the Free Software Foundation, +-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +-- not in book + +library ieee; use ieee.std_logic_1164.all; + +entity bus_sequencer is + port ( rd, wr, sel, width, burst : out std_ulogic; + addr_low_4 : out std_ulogic_vector(3 downto 0); + ready : out std_ulogic; + control_reg_wr, status_reg_rd, data_fifo_wr, data_fifo_rd, + analog_out_wr_0, + other_signal : out std_ulogic ); +end entity bus_sequencer; + +---------------- + +library ieee; use ieee.std_logic_1164.all; + +entity state_register is + port ( phi1, phi2 : in std_ulogic; + next_state : in std_ulogic_vector(3 downto 0); + current_state : out std_ulogic_vector(3 downto 0) ); +end entity state_register; + + +architecture std_cell of state_register is + +begin + +end architecture std_cell; + +-- end not in book + + + + +architecture fsm of bus_sequencer is + + -- This architecture implements the sequencer as a finite-state machine. + -- NOTE: it uses the clock signals from clock_power_pkg to synchronize the fsm. + + signal next_state_vector : -- . . .; + -- not in book + std_ulogic_vector(3 downto 0); + signal current_state_vector : std_ulogic_vector(3 downto 0); + -- end not in book + +begin + + bus_sequencer_state_register : entity work.state_register(std_cell) + port map ( phi1 => work.clock_power_pkg.clock_phase1, + phi2 => work.clock_power_pkg.clock_phase2, + next_state => next_state_vector, + -- . . . ); + -- not in book + current_state => current_state_vector ); + -- end not in book + + -- . . . + +end architecture fsm; |