--- J.STELZNER\r
--- INFORMATIK-3 LABOR\r
--- 23.08.2006\r
--- File: INTERRUPT.VHD\r
-\r
-library ieee;\r
-use ieee.std_logic_1164.all;\r
-\r
-entity INTERRUPT is\r
- port\r
- (\r
- PCI_CLOCK :in std_logic;\r
- PCI_RSTn :in std_logic; -- PCI reset is asynchron (low active)\r
- RESET :in std_logic;\r
- TAST_SETn :in std_logic;\r
- TAST_RESn :in std_logic;\r
- INT_IN_0 :in std_logic;\r
- INT_IN_1 :in std_logic;\r
- INT_IN_2 :in std_logic;\r
- INT_IN_3 :in std_logic;\r
- INT_IN_4 :in std_logic;\r
- INT_IN_5 :in std_logic;\r
- INT_IN_6 :in std_logic;\r
- INT_IN_7 :in std_logic;\r
- TRDYn :in std_logic; -- event 1 after read of Interrupt status register (low active)\r
- READ_XX5_4 :in std_logic; -- event 2 after read of Interrupt status register\r
- INT_RES :in std_logic_vector(7 downto 0); -- clear selected interrupts\r
- INT_MASKE :in std_logic_vector(7 downto 0); -- interrupt mask register\r
- INT_REG :out std_logic_vector(7 downto 0); -- interrupt status register\r
- INTAn :out std_logic; -- second interrupt line for PCI analyzer\r
- PCI_INTAn :out std_logic -- PCI interrupt line \r
- );\r
-\r
-end entity INTERRUPT;\r
-\r
-architecture INTERRUPT_DESIGN of INTERRUPT is\r
-\r
- signal SIG_TAST_Q :std_logic;\r
- signal SIG_TAST_Qn :std_logic;\r
-\r
-\r
- signal SIG_INTA :std_logic; \r
-\r
- signal FF_A :std_logic_vector(7 downto 0);\r
- signal FF_B :std_logic_vector(7 downto 0); \r
- signal SET :std_logic_vector(7 downto 0); \r
-\r
- signal SIG_PROPAGATE_INT :std_logic;\r
- signal SIG_PROPAGATE_INT_SECOND :std_logic;\r
- signal REG :std_logic_vector(7 downto 0);\r
-\r
-begin\r
-\r
-\r
-\r
-\r
-------------------------------------------------------\r
- process (PCI_CLOCK) \r
- begin \r
- if (PCI_CLOCK'event and PCI_CLOCK ='1') then \r
-\r
- SIG_TAST_Q <= not (TAST_SETn and SIG_TAST_Qn);\r
- \r
- SIG_TAST_Qn <= not (TAST_RESn and SIG_TAST_Q);\r
- \r
- end if;\r
- end process; \r
-\r
-------------------------------------------------------\r
-\r
- process (PCI_CLOCK)\r
- begin\r
- if (PCI_RSTn = '0') then\r
- SET <= "00000000";\r
- FF_A <= "00000000";\r
- FF_B <= "00000000";\r
-\r
- elsif(PCI_CLOCK'event and PCI_CLOCK = '1') then\r
- if(RESET = '1') then\r
- SET <= "00000000";\r
- FF_A <= "00000000";\r
- FF_B <= "00000000";\r
- else \r
-\r
- FF_A(0) <= INT_IN_0 ; -- Receive FIFO Empty Flag\r
-\r
- FF_A(1) <= INT_IN_1 ; -- Send FIFO Half Full\r
- FF_A(2) <= INT_IN_2 ; \r
- FF_A(3) <= INT_IN_3 ; \r
-\r
- FF_A(4) <= INT_IN_4 ; \r
-\r
- FF_A(5) <= INT_IN_5 ; \r
- FF_A(6) <= INT_IN_6 ; \r
- FF_A(7) <= INT_IN_7 ; \r
-\r
- FF_B <= FF_A ;\r
-\r
- SET <= FF_A AND not FF_B;\r
- end if;\r
- end if;\r
- end process;\r
-\r
- process (PCI_CLOCK,PCI_RSTn)\r
- begin\r
- if (PCI_RSTn = '0') then\r
- REG <= "00000000";\r
-\r
- elsif(PCI_CLOCK'event and PCI_CLOCK = '1') then\r
- if(RESET = '1') then\r
- REG <= "00000000";\r
-\r
- elsif(SIG_TAST_Q = '1') then\r
- REG <= "00000000" or SET;\r
-\r
- elsif (TRDYn = '0' AND READ_XX5_4 = '1') then\r
- REG <= (REG AND NOT INT_RES) OR SET;\r
- else\r
- REG <= REG OR SET;\r
- end if;\r
- end if;\r
- end process;\r
-\r
- SIG_PROPAGATE_INT <= SIG_TAST_Q\r
- OR (REG(0) AND not INT_MASKE(0)) \r
- OR (REG(1) AND not INT_MASKE(1))\r
- OR (REG(2) AND not INT_MASKE(2))\r
- OR (REG(3) AND not INT_MASKE(3))\r
- OR (REG(4) AND not INT_MASKE(4))\r
- OR (REG(5) AND not INT_MASKE(5))\r
- OR (REG(6) AND not INT_MASKE(6))\r
- OR (REG(7) AND not INT_MASKE(7));\r
-\r
- process (PCI_CLOCK)\r
- begin\r
- if(PCI_CLOCK'event and PCI_CLOCK = '1') then\r
- SIG_PROPAGATE_INT_SECOND <= not SIG_PROPAGATE_INT;\r
- end if;\r
- end process;\r
-\r
-\r
- INTAn <= not SIG_PROPAGATE_INT_SECOND;\r
- PCI_INTAn <= '0' when SIG_PROPAGATE_INT_SECOND = '0' else 'Z';\r
-\r
- INT_REG <= REG;\r
-\r
-end architecture INTERRUPT_DESIGN;\r
+-- J.STELZNER
+-- INFORMATIK-3 LABOR
+-- 23.08.2006
+-- File: INTERRUPT.VHD
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity INTERRUPT is
+ port
+ (
+ PCI_CLOCK :in std_logic;
+ PCI_RSTn :in std_logic; -- PCI reset is asynchron (low active)
+ RESET :in std_logic;
+ TAST_SETn :in std_logic;
+ TAST_RESn :in std_logic;
+ INT_IN_0 :in std_logic;
+ INT_IN_1 :in std_logic;
+ INT_IN_2 :in std_logic;
+ INT_IN_3 :in std_logic;
+ INT_IN_4 :in std_logic;
+ INT_IN_5 :in std_logic;
+ INT_IN_6 :in std_logic;
+ INT_IN_7 :in std_logic;
+ TRDYn :in std_logic; -- event 1 after read of Interrupt status register (low active)
+ READ_XX5_4 :in std_logic; -- event 2 after read of Interrupt status register
+ INT_RES :in std_logic_vector(7 downto 0); -- clear selected interrupts
+ INT_MASKE :in std_logic_vector(7 downto 0); -- interrupt mask register
+ INT_REG :out std_logic_vector(7 downto 0); -- interrupt status register
+ INTAn :out std_logic; -- second interrupt line for PCI analyzer
+ PCI_INTAn :out std_logic -- PCI interrupt line
+ );
+
+end entity INTERRUPT;
+
+architecture INTERRUPT_DESIGN of INTERRUPT is
+
+ signal SIG_TAST_Q :std_logic;
+ signal SIG_TAST_Qn :std_logic;
+
+
+ signal SIG_INTA :std_logic;
+
+ signal FF_A :std_logic_vector(7 downto 0);
+ signal FF_B :std_logic_vector(7 downto 0);
+ signal SET :std_logic_vector(7 downto 0);
+
+ signal SIG_PROPAGATE_INT :std_logic;
+ signal SIG_PROPAGATE_INT_SECOND :std_logic;
+ signal REG :std_logic_vector(7 downto 0);
+
+begin
+
+
+
+
+ ------------------------------------------------------
+ process (PCI_CLOCK)
+ begin
+ if (PCI_CLOCK'event and PCI_CLOCK ='1') then
+
+ -- THIS IS BROKEN (it cycles the interrupt)
+ SIG_TAST_Q <= not (TAST_SETn and SIG_TAST_Qn);
+ SIG_TAST_Qn <= not (TAST_RESn and SIG_TAST_Q);
+
+ end if;
+ end process;
+
+ ------------------------------------------------------
+
+ process (PCI_CLOCK)
+ begin
+ if (PCI_RSTn = '0') then
+ SET <= "00000000";
+ FF_A <= "00000000";
+ FF_B <= "00000000";
+
+ elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
+ if (RESET = '1') then
+ SET <= "00000000";
+ FF_A <= "00000000";
+ FF_B <= "00000000";
+ else
+ FF_A(0) <= INT_IN_0; -- Receive FIFO Empty Flag
+
+ FF_A(1) <= INT_IN_1; -- Send FIFO Half Full
+ FF_A(2) <= INT_IN_2;
+ FF_A(3) <= INT_IN_3;
+
+ FF_A(4) <= INT_IN_4;
+
+ FF_A(5) <= INT_IN_5;
+ FF_A(6) <= INT_IN_6;
+ FF_A(7) <= INT_IN_7;
+
+ FF_B <= FF_A;
+
+ SET <= FF_A AND not FF_B;
+ end if;
+ end if;
+ end process;
+
+ process (PCI_CLOCK,PCI_RSTn)
+ begin
+ if (PCI_RSTn = '0') then
+ REG <= "00000000";
+
+ elsif(PCI_CLOCK'event and PCI_CLOCK = '1') then
+ if(RESET = '1') then
+ REG <= "00000000";
+
+ -- elsif(SIG_TAST_Q = '1') then
+ -- REG <= "00000000" or SET;
+
+ elsif (TRDYn = '0' AND READ_XX5_4 = '1') then
+ REG <= (REG AND NOT INT_RES) OR SET;
+ else
+ REG <= REG OR SET;
+ end if;
+ end if;
+ end process;
+
+ SIG_PROPAGATE_INT <=
+ (REG(0) AND INT_MASKE(0))
+ OR (REG(1) AND INT_MASKE(1))
+ OR (REG(2) AND INT_MASKE(2))
+ OR (REG(3) AND INT_MASKE(3))
+ OR (REG(4) AND INT_MASKE(4))
+ OR (REG(5) AND INT_MASKE(5))
+ OR (REG(6) AND INT_MASKE(6))
+ OR (REG(7) AND INT_MASKE(7));
+
+ process (PCI_CLOCK)
+ begin
+ if(PCI_CLOCK'event and PCI_CLOCK = '1') then
+ SIG_PROPAGATE_INT_SECOND <= not SIG_PROPAGATE_INT;
+ end if;
+ end process;
+
+ INTAn <= not SIG_PROPAGATE_INT_SECOND;
+ PCI_INTAn <= '0' when SIG_PROPAGATE_INT_SECOND = '0' else 'Z';
+ INT_REG <= REG;
+
+end architecture INTERRUPT_DESIGN;
projects / raggedstone / blobdiff