[100] | 1 | ---------------------------------------------------------------------------------- |
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| 2 | -- Company: |
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| 3 | -- Engineer: |
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| 4 | -- |
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| 5 | -- Create Date: 14:00:24 08/01/2013 |
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| 6 | -- Design Name: |
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| 7 | -- Module Name: Ex5_FSM - Behavioral |
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| 8 | -- Project Name: |
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| 9 | -- Target Devices: |
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| 10 | -- Tool versions: |
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| 11 | -- Description: |
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| 12 | -- |
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| 13 | -- Dependencies: |
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| 14 | -- |
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| 15 | -- Revision: |
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| 16 | -- Revision 0.01 - File Created |
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| 17 | -- Additional Comments: |
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| 18 | -- |
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| 19 | ---------------------------------------------------------------------------------- |
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| 20 | library IEEE; |
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| 21 | use IEEE.STD_LOGIC_1164.ALL; |
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| 22 | |
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| 23 | -- Uncomment the following library declaration if using |
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| 24 | -- arithmetic functions with Signed or Unsigned values |
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| 25 | --use IEEE.NUMERIC_STD.ALL; |
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| 26 | |
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| 27 | -- Uncomment the following library declaration if instantiating |
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| 28 | -- any Xilinx primitives in this code. |
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| 29 | --library UNISIM; |
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| 30 | --use UNISIM.VComponents.all; |
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| 31 | |
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| 32 | entity Ex5_FSM is |
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| 33 | Port ( clk : in STD_LOGIC; |
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| 34 | reset : in STD_LOGIC; |
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| 35 | |
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| 36 | SpawnOn : in STD_LOGIC; |
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| 37 | NocPortFree : in STD_LOGIC; |
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| 38 | InterCSet : in STD_LOGIC; |
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| 39 | TaskLoaded : in STD_LOGIC; |
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| 40 | TaskInit : in STD_LOGIC; |
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| 41 | TaskOn : in STD_LOGIC; |
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| 42 | TimeOut : out STD_LOGIC; |
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| 43 | DataReceived : in STD_LOGIC_VECTOR (7 downto 0); |
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| 44 | DataToSend : out STD_LOGIC_VECTOR (7 downto 0)); |
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| 45 | end Ex5_FSM; |
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| 46 | |
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| 47 | architecture Behavioral of Ex5_FSM is |
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| 48 | type Spawn_type is (Init,CheckFree,LoadTask,CountTask,StartTask,WaitTaskInit,SetGroup,SetInterCom,RetInterCom,ErrSpawn,EndSpawn); |
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| 49 | signal spawn_st, next_spawn : spawn_type; |
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| 50 | begin |
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| 51 | --Insert the following in the architecture after the begin keyword |
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| 52 | SYNC_spawn: process (clk) |
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| 53 | begin |
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| 54 | if (clk'event and clk = '1') then |
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| 55 | if (reset = '1') then |
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| 56 | spawn_st <= init; |
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| 57 | |
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| 58 | else |
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| 59 | spawn_st <= next_spawn; |
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| 60 | --<output> <= <output>_i; |
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| 61 | -- assign other outputs to internal signals |
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| 62 | end if; |
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| 63 | end if; |
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| 64 | end process; |
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| 65 | |
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| 66 | --MOORE State-Machine - Outputs based on state only |
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| 67 | OUTPUT_DECODE: process (Spawn_st) |
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| 68 | begin |
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| 69 | --insert statements to decode internal output signals |
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| 70 | --below is simple example |
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| 71 | case (spawn_st) is |
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| 72 | when init => |
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| 73 | |
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| 74 | when CheckFree => |
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| 75 | |
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| 76 | when LoadTask => |
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| 77 | |
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| 78 | when StartTask => |
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| 79 | |
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| 80 | when CountTask => |
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| 81 | |
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| 82 | when WaitAllTaskInit => |
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| 83 | |
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| 84 | when SetGroup => |
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| 85 | |
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| 86 | when SetInterCom => |
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| 87 | |
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| 88 | when RetInterCom => |
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| 89 | |
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| 90 | when EndSpawn => |
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| 91 | |
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| 92 | when others => |
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| 93 | |
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| 94 | end case; |
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| 95 | end process; |
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| 96 | |
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| 97 | NEXT_STATE_DECODE: process (spawn_st, spawnOn,Datareceived) |
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| 98 | begin |
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| 99 | --declare default state for next_state to avoid latches |
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| 100 | next_spawn <= spawn_st; --default is to stay in current state |
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| 101 | --insert statements to decode next_state |
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| 102 | --below is a simple example |
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| 103 | case (spawn_st) is |
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| 104 | when init => |
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| 105 | if spawnOn = '1' then |
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| 106 | next_spawn <= Checkfree; |
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| 107 | end if; |
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| 108 | when CheckFree => |
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| 109 | if NoCPortFree = '1' then |
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| 110 | next_spawn<= LoadTask; |
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| 111 | end if; |
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| 112 | when LoadTask => |
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| 113 | next_spawn <= CountTask; |
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| 114 | when StartTask => |
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| 115 | if TaskInit = '1' then |
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| 116 | next_spawn <= WaitAllTaskInit; |
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| 117 | end if; |
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| 118 | when WaitAllTaskInit => |
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| 119 | if InterComSet = '1' then |
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| 120 | next_spawn <= SetGroup; |
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| 121 | end if; |
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| 122 | when SetGroup => |
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| 123 | if InterComSet = '1' then |
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| 124 | next_spawn <= SetInterCom ; |
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| 125 | end if; |
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| 126 | when SetInterCom => |
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| 127 | if InterComSet = '1' then |
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| 128 | next_spawn <= RetInterCom ; |
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| 129 | end if; |
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| 130 | when RetInterCom => |
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| 131 | if AppAck = '1' then |
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| 132 | next_spawn <= EndSpawn; |
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| 133 | end if; |
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| 134 | when others => |
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| 135 | next_spawn <= init; |
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| 136 | end case; |
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| 137 | end process; |
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| 138 | |
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| 139 | |
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| 140 | end Behavioral; |
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| 141 | |
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