+++ /dev/null
--- J.STELZNER\r
--- INFORMATIK-3 LABOR\r
--- 23.08.2006\r
--- File: CONT_FSM.VHD\r
-\r
-library ieee;\r
-use ieee.std_logic_1164.all ;\r
-\r
-entity CONT_FSM is\r
- port\r
- (\r
- PCI_CLOCK :in std_logic; \r
- PCI_RSTn :in std_logic; \r
- IO_READ :in std_logic;\r
- IO_WRITE :in std_logic;\r
- CONF_READ :in std_logic;\r
- CONF_WRITE :in std_logic;\r
- FIFO_READ :in std_logic;\r
- READ :out std_logic;--> MUX_SEL(1) , OE_PCI_AD \r
- PERR_CHECK :out std_logic; \r
- DEVSELn :out std_logic;\r
- OE_PCI_PAR :out std_logic;\r
- OE_PCI_PERR :out std_logic;\r
- TRDYn :out std_logic;\r
- PCI_TRDYn :out std_logic; -- s/t/s\r
- PCI_STOPn :out std_logic; -- s/t/s \r
- PCI_DEVSELn :out std_logic; -- s/t/s \r
- FIFO_RDn :out std_logic\r
- );\r
-end entity CONT_FSM ;\r
-\r
-architecture CONT_FSM_DESIGN of CONT_FSM is\r
-\r
-\r
-\r
---**********************************************************\r
---*** CONTROL FSM CODIERUNG ***\r
---**********************************************************\r
---\r
---\r
---\r
--- |----------- HELP\r
--- ||---------- FIFO_READn\r
--- |||--------- OE_PCI_PERR \r
--- ||||-------- PERR_CHECK \r
--- |||||------- TRDYn \r
--- ||||||------ STOPn \r
--- |||||||----- DEVSELn \r
--- ||||||||---- OE_PCI_PAR \r
--- |||||||||--- OE_CONTROL \r
--- ||||||||||-- READ / MUX_SEL(1) / OE_PCI_AD \r
--- |||||||||| \r
- constant ST_IDLE :std_logic_vector (9 downto 0) := "0100111000" ;-- 138\r
-\r
- constant ST_READ_1 :std_logic_vector (9 downto 0) := "0100110011" ;-- 133\r
- constant ST_READ_2 :std_logic_vector (9 downto 0) := "0100000111" ;-- 107\r
- constant ST_READ_3 :std_logic_vector (9 downto 0) := "0100111111" ;-- 13F\r
-\r
- constant ST_RD_FIFO_1 :std_logic_vector (9 downto 0) := "0000110011" ;-- 033\r
- constant ST_RD_FIFO_2 :std_logic_vector (9 downto 0) := "1100110011" ;-- 233\r
-\r
-\r
- constant ST_WRITE_1 :std_logic_vector (9 downto 0) := "0111110010" ;-- 1F2\r
- constant ST_WRITE_2 :std_logic_vector (9 downto 0) := "0110000010" ;-- 182\r
- constant ST_WRITE_3 :std_logic_vector (9 downto 0) := "0110111010" ;-- 1BA\r
-\r
- signal CONTROL_STATE :std_logic_vector (9 downto 0);\r
-\r
-\r
---signal DEVSELn :std_logic;\r
- signal STOPn :std_logic;\r
---signal TRDYn :std_logic;\r
-\r
---************************************************************\r
---*** FSM SPEICHER-AUTOMAT ***\r
---************************************************************\r
-\r
- attribute syn_state_machine : boolean;\r
- attribute syn_state_machine of CONTROL_STATE : signal is false;\r
-\r
-begin\r
-\r
---**********************************************************\r
---*** CONTROL FSM ***\r
---**********************************************************\r
-\r
- process (PCI_CLOCK, PCI_RSTn) \r
- begin\r
- if PCI_RSTn = '0' then CONTROL_STATE <= ST_IDLE;\r
-\r
- elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then\r
- \r
- case CONTROL_STATE is\r
- \r
- when ST_IDLE => \r
- if IO_READ = '1' then\r
- CONTROL_STATE <= ST_READ_1;\r
-\r
- elsif CONF_READ = '1' then\r
- CONTROL_STATE <= ST_READ_1; \r
-\r
- elsif IO_WRITE = '1' then\r
- CONTROL_STATE <= ST_WRITE_1; \r
- \r
- elsif CONF_WRITE = '1' then\r
- CONTROL_STATE <= ST_WRITE_1;\r
- \r
- else CONTROL_STATE <= ST_IDLE;\r
- end if; \r
-\r
--- when ST_READ_1 => CONTROL_STATE <= ST_READ_2;\r
- when ST_READ_1 => \r
- if FIFO_READ = '1' then\r
- CONTROL_STATE <= ST_RD_FIFO_1;\r
- else CONTROL_STATE <= ST_READ_2;\r
- end if; \r
-\r
-\r
- when ST_READ_2 => CONTROL_STATE <= ST_READ_3;\r
- when ST_READ_3 => CONTROL_STATE <= ST_IDLE;\r
-\r
- when ST_RD_FIFO_1=> CONTROL_STATE <= ST_RD_FIFO_2;\r
- when ST_RD_FIFO_2=> CONTROL_STATE <= ST_READ_2;\r
-\r
-\r
- \r
- when ST_WRITE_1 => CONTROL_STATE <= ST_WRITE_2;\r
- when ST_WRITE_2 => CONTROL_STATE <= ST_WRITE_3;\r
- when ST_WRITE_3 => CONTROL_STATE <= ST_IDLE;\r
-\r
- \r
- when others => CONTROL_STATE <= ST_IDLE; \r
-\r
- end case; -- COMM_STATE \r
- end if; -- CLOCK \r
- end process; -- PROCESS\r
-\r
-\r
- READ <= CONTROL_STATE(0);\r
---OE_CONTROL <= CONTROL_STATE(1);\r
- OE_PCI_PAR <= CONTROL_STATE(2);\r
- DEVSELn <= CONTROL_STATE(3);\r
- STOPn <= CONTROL_STATE(4);\r
- TRDYn <= CONTROL_STATE(5);\r
- PERR_CHECK <= CONTROL_STATE(6);\r
- OE_PCI_PERR <= CONTROL_STATE(7);\r
-\r
- FIFO_RDn <= CONTROL_STATE(8);\r
-\r
-\r
- PCI_DEVSELn <= CONTROL_STATE(3) when CONTROL_STATE(1) = '1' else 'Z';\r
- PCI_STOPn <= STOPn when CONTROL_STATE(1) = '1' else 'Z'; \r
- PCI_TRDYn <= CONTROL_STATE(5) when CONTROL_STATE(1) = '1' else 'Z'; \r
-\r
-end architecture CONT_FSM_DESIGN ;\r
-\r
projects / raggedstone / blobdiff