-- File: CONT_FSM.VHD
library ieee;
-use ieee.std_logic_1164.all ;
+use ieee.std_logic_1164.all;
entity CONT_FSM is
- port
- (
- PCI_CLOCK :in std_logic;
- PCI_RSTn :in std_logic;
- IO_READ :in std_logic;
- IO_WRITE :in std_logic;
- CONF_READ :in std_logic;
- CONF_WRITE :in std_logic;
- FIFO_READ :in std_logic;
- READ :out std_logic;--> MUX_SEL(1) , OE_PCI_AD
- PERR_CHECK :out std_logic;
- DEVSELn :out std_logic;
- OE_PCI_PAR :out std_logic;
- OE_PCI_PERR :out std_logic;
- TRDYn :out std_logic;
- PCI_TRDYn :out std_logic; -- s/t/s
- PCI_STOPn :out std_logic; -- s/t/s
- PCI_DEVSELn :out std_logic; -- s/t/s
- FIFO_RDn :out std_logic
- );
-end entity CONT_FSM ;
+ port
+ (
+ PCI_CLOCK :in std_logic;
+ PCI_RSTn :in std_logic;
+ IO_READ :in std_logic;
+ IO_WRITE :in std_logic;
+ CONF_READ :in std_logic;
+ CONF_WRITE :in std_logic;
+ FIFO_READ :in std_logic;
+ READ :out std_logic;--> MUX_SEL(1) , OE_PCI_AD
+ PERR_CHECK :out std_logic;
+ DEVSELn :out std_logic;
+ OE_PCI_PAR :out std_logic;
+ OE_PCI_PERR :out std_logic;
+ TRDYn :out std_logic;
+ PCI_TRDYn :out std_logic; -- s/t/s
+ PCI_STOPn :out std_logic; -- s/t/s
+ PCI_DEVSELn :out std_logic; -- s/t/s
+ FIFO_RDn :out std_logic
+ );
+end entity CONT_FSM;
architecture CONT_FSM_DESIGN of CONT_FSM is
---**********************************************************
---*** CONTROL FSM CODIERUNG ***
---**********************************************************
---
---
---
--- |----------- HELP
--- ||---------- FIFO_READn
--- |||--------- OE_PCI_PERR
--- ||||-------- PERR_CHECK
--- |||||------- TRDYn
--- ||||||------ STOPn
--- |||||||----- DEVSELn
--- ||||||||---- OE_PCI_PAR
--- |||||||||--- OE_CONTROL
--- ||||||||||-- READ / MUX_SEL(1) / OE_PCI_AD
--- ||||||||||
- constant ST_IDLE :std_logic_vector (9 downto 0) := "0100111000" ;-- 138
+ --**********************************************************
+ --*** CONTROL FSM CODIERUNG ***
+ --**********************************************************
+ --
+ --
+ --
+ -- |----------- HELP
+ -- ||---------- FIFO_READn
+ -- |||--------- OE_PCI_PERR
+ -- ||||-------- PERR_CHECK
+ -- |||||------- TRDYn
+ -- ||||||------ STOPn
+ -- |||||||----- DEVSELn
+ -- ||||||||---- OE_PCI_PAR
+ -- |||||||||--- OE_CONTROL
+ -- ||||||||||-- READ / MUX_SEL(1) / OE_PCI_AD
+ -- ||||||||||
+ constant ST_IDLE :std_logic_vector (9 downto 0) := "0100111000";-- 138
- constant ST_READ_1 :std_logic_vector (9 downto 0) := "0100110011" ;-- 133
- constant ST_READ_2 :std_logic_vector (9 downto 0) := "0100000111" ;-- 107
- constant ST_READ_3 :std_logic_vector (9 downto 0) := "0100111111" ;-- 13F
+ constant ST_READ_1 :std_logic_vector (9 downto 0) := "0100110011";-- 133
+ constant ST_READ_2 :std_logic_vector (9 downto 0) := "0100000111";-- 107
+ constant ST_READ_3 :std_logic_vector (9 downto 0) := "0100111111";-- 13F
- constant ST_RD_FIFO_1 :std_logic_vector (9 downto 0) := "0000110011" ;-- 033
- constant ST_RD_FIFO_2 :std_logic_vector (9 downto 0) := "1100110011" ;-- 233
+ constant ST_RD_FIFO_1 :std_logic_vector (9 downto 0) := "0000110011";-- 033
+ constant ST_RD_FIFO_2 :std_logic_vector (9 downto 0) := "1100110011";-- 233
- constant ST_WRITE_1 :std_logic_vector (9 downto 0) := "0111110010" ;-- 1F2
- constant ST_WRITE_2 :std_logic_vector (9 downto 0) := "0110000010" ;-- 182
- constant ST_WRITE_3 :std_logic_vector (9 downto 0) := "0110111010" ;-- 1BA
+ constant ST_WRITE_1 :std_logic_vector (9 downto 0) := "0111110010";-- 1F2
+ constant ST_WRITE_2 :std_logic_vector (9 downto 0) := "0110000010";-- 182
+ constant ST_WRITE_3 :std_logic_vector (9 downto 0) := "0110111010";-- 1BA
- signal CONTROL_STATE :std_logic_vector (9 downto 0);
+ signal CONTROL_STATE :std_logic_vector (9 downto 0);
---signal DEVSELn :std_logic;
- signal STOPn :std_logic;
---signal TRDYn :std_logic;
+ --signal DEVSELn :std_logic;
+ signal STOPn :std_logic;
+ --signal TRDYn :std_logic;
---************************************************************
---*** FSM SPEICHER-AUTOMAT ***
---************************************************************
+ --************************************************************
+ --*** FSM SPEICHER-AUTOMAT ***
+ --************************************************************
- attribute syn_state_machine : boolean;
- attribute syn_state_machine of CONTROL_STATE : signal is false;
+ attribute syn_state_machine : boolean;
+ attribute syn_state_machine of CONTROL_STATE : signal is false;
begin
---**********************************************************
---*** CONTROL FSM ***
---**********************************************************
+ --**********************************************************
+ --*** CONTROL FSM ***
+ --**********************************************************
- process (PCI_CLOCK, PCI_RSTn)
- begin
- if PCI_RSTn = '0' then CONTROL_STATE <= ST_IDLE;
+ process (PCI_CLOCK, PCI_RSTn)
+ begin
+ if PCI_RSTn = '0' then CONTROL_STATE <= ST_IDLE;
- elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
-
- case CONTROL_STATE is
-
- when ST_IDLE =>
- if IO_READ = '1' then
- CONTROL_STATE <= ST_READ_1;
+ elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
- elsif CONF_READ = '1' then
- CONTROL_STATE <= ST_READ_1;
+ case CONTROL_STATE is
+ when ST_IDLE =>
+ if IO_READ = '1' then
+ CONTROL_STATE <= ST_READ_1;
- elsif IO_WRITE = '1' then
- CONTROL_STATE <= ST_WRITE_1;
-
- elsif CONF_WRITE = '1' then
- CONTROL_STATE <= ST_WRITE_1;
-
- else CONTROL_STATE <= ST_IDLE;
- end if;
+ elsif CONF_READ = '1' then
+ CONTROL_STATE <= ST_READ_1;
--- when ST_READ_1 => CONTROL_STATE <= ST_READ_2;
- when ST_READ_1 =>
- if FIFO_READ = '1' then
- CONTROL_STATE <= ST_RD_FIFO_1;
- else CONTROL_STATE <= ST_READ_2;
- end if;
+ elsif IO_WRITE = '1' then
+ CONTROL_STATE <= ST_WRITE_1;
+ elsif CONF_WRITE = '1' then
+ CONTROL_STATE <= ST_WRITE_1;
- when ST_READ_2 => CONTROL_STATE <= ST_READ_3;
- when ST_READ_3 => CONTROL_STATE <= ST_IDLE;
+ else CONTROL_STATE <= ST_IDLE;
+ end if;
- when ST_RD_FIFO_1=> CONTROL_STATE <= ST_RD_FIFO_2;
- when ST_RD_FIFO_2=> CONTROL_STATE <= ST_READ_2;
+ -- when ST_READ_1 =>
+ -- CONTROL_STATE <= ST_READ_2;
+ when ST_READ_1 =>
+ if FIFO_READ = '1' then
+ CONTROL_STATE <= ST_RD_FIFO_1;
+ else
+ CONTROL_STATE <= ST_READ_2;
+ end if;
-
- when ST_WRITE_1 => CONTROL_STATE <= ST_WRITE_2;
- when ST_WRITE_2 => CONTROL_STATE <= ST_WRITE_3;
- when ST_WRITE_3 => CONTROL_STATE <= ST_IDLE;
+ when ST_READ_2 =>
+ CONTROL_STATE <= ST_READ_3;
-
- when others => CONTROL_STATE <= ST_IDLE;
+ when ST_READ_3 =>
+ CONTROL_STATE <= ST_IDLE;
- end case; -- COMM_STATE
- end if; -- CLOCK
- end process; -- PROCESS
+ when ST_RD_FIFO_1=>
+ CONTROL_STATE <= ST_RD_FIFO_2;
+ when ST_RD_FIFO_2=>
+ CONTROL_STATE <= ST_READ_2;
- READ <= CONTROL_STATE(0);
---OE_CONTROL <= CONTROL_STATE(1);
- OE_PCI_PAR <= CONTROL_STATE(2);
- DEVSELn <= CONTROL_STATE(3);
- STOPn <= CONTROL_STATE(4);
- TRDYn <= CONTROL_STATE(5);
- PERR_CHECK <= CONTROL_STATE(6);
- OE_PCI_PERR <= CONTROL_STATE(7);
+ when ST_WRITE_1 =>
+ CONTROL_STATE <= ST_WRITE_2;
- FIFO_RDn <= CONTROL_STATE(8);
+ when ST_WRITE_2 =>
+ CONTROL_STATE <= ST_WRITE_3;
+ when ST_WRITE_3 =>
+ CONTROL_STATE <= ST_IDLE;
- PCI_DEVSELn <= CONTROL_STATE(3) when CONTROL_STATE(1) = '1' else 'Z';
- PCI_STOPn <= STOPn when CONTROL_STATE(1) = '1' else 'Z';
- PCI_TRDYn <= CONTROL_STATE(5) when CONTROL_STATE(1) = '1' else 'Z';
+ when others =>
+ CONTROL_STATE <= ST_IDLE;
-end architecture CONT_FSM_DESIGN ;
+ end case; -- COMM_STATE
+ end if; -- CLOCK
+end process; -- PROCESS
+
+READ <= CONTROL_STATE(0);
+--OE_CONTROL <= CONTROL_STATE(1);
+OE_PCI_PAR <= CONTROL_STATE(2);
+DEVSELn <= CONTROL_STATE(3);
+STOPn <= CONTROL_STATE(4);
+TRDYn <= CONTROL_STATE(5);
+PERR_CHECK <= CONTROL_STATE(6);
+OE_PCI_PERR <= CONTROL_STATE(7);
+
+FIFO_RDn <= CONTROL_STATE(8);
+
+
+PCI_DEVSELn <= CONTROL_STATE(3) when CONTROL_STATE(1) = '1' else 'Z';
+PCI_STOPn <= STOPn when CONTROL_STATE(1) = '1' else 'Z';
+PCI_TRDYn <= CONTROL_STATE(5) when CONTROL_STATE(1) = '1' else 'Z';
+
+end architecture CONT_FSM_DESIGN;
projects / raggedstone / blobdiff