Im having problems in setting up the test bench for a reciever.

[jasear]

here is the code for the reciever:

1: library IEEE;

2: use IEEE.std_logic_1164.all;

3:

4: entity PRBS_RX is

5: port(

6: CLK: in STD_LOGIC;

7: EN_PRBSRX: in STD_LOGIC;

8: PRBS_IN: in STD_LOGIC;

9: RST_PRBS: in STD_LOGIC;

10: READ_PRBS_IN_TEST: out STD_LOGIC;

11: PRBS_ERROR: out STD_LOGIC;

12: );

13: end PRBS_RX;

14:

15: architecture PRBS_RX_arch of PRBS_RX is

16:

17: signal MUX_OUT: STD_LOGIC;

18: signal PRBS_FEEDBACK: STD_LOGIC;

19: signal READ_PRBS_IN: STD_LOGIC;

20: signal Q: STD_LOGIC_VECTOR(14 downto 0);

21: signal D: STD_LOGIC_VECTOR(14 downto 0);

22: signal COUNTPRBS: INTEGER range 0 to 31;

23: signal PRBS_OUT: STD_LOGIC;

24:

25:

26: begin

27:

28: process(CLK, EN_PRBSRX, RST_PRBS)

29: begin

30: if(CLK'event and CLK = '1')then

31: if(RST_PRBS = '1')then

32: Q <= &quot;000000000000000&quot;;

33: else

34: if(EN_PRBSRX = '1')then

35: Q <= D;

36: else

37: Q <= Q;

38: end if;

39: end if;

40: end if;

41: end process;

42:

43:

44: process(PRBS_FEEDBACK, READ_PRBS_IN, PRBS_IN, PRBS_FEEDBACK)

45: begin

46: if(READ_PRBS_IN = '0')then

47: MUX_OUT <= PRBS_IN;

48: else

49: MUX_OUT <= PRBS_FEEDBACK;

50: endif;

51: end process;

52:

53:

54: process(CLK, RST_PRBS, EN_PRBSRX)

55: begin

56: if(CLK'event and CLK = '1')then

57: if(RST_PRBS = '1' or COUNTPRBS = 31)then

58: COUNTPRBS <= 0;

59: elsif(EN_PRBSRX = '1')then

60: COUNTPRBS <= COUNTPRBS + 1;

61: else

62: COUNTPRBS <= COUNTPRBS;

63: endif;

64: endif;

65: end process;

66:

67:

68: process(CLK, COUNTPRBS, RST_PRBS, EN_PRBSRX)

69: begin

70:

71: if(CLK'event and CLK = '1')then

72: if(RST_PRBS = '1')then

73: READ_PRBS_IN <= '0';

74: elsif(COUNTPRBS = 31)then

75: READ_PRBS_IN <= '1';

76: endif;

77: endif;

78: end process;

79:

80:

81: process(CLK, PRBS_FEEDBACK, PRBS_IN, READ_PRBS_IN)

82: begin

83: if(CLK'event and CLK = '1')then

84: if(READ_PRBS_IN = '1')then

85: PRBS_ERROR <= (PRBS_FEEDBACK xnor PRBS_IN);

86: else

87: PRBS_ERROR <= '0';

88: endif;

89: endif;

90: end process;

91:

92:

93: D(14) <= MUX_OUT;

94: D(13) <= Q(14);

95: D(12) <= Q(13);

96: D(11) <= Q(12);

97: D(10) <= Q(11);

98: D(9) <= Q(10);

99: D(8) <= Q(9);

100: D(7) <= Q(8);

101: D(6) <= Q(7);

102: D(5) <= Q(6);

103: D(4) <= Q(5);

104: D(3) <= Q(4);

105: D(2) <= Q(3);

106: D(1) <= Q(2);

107: D(0) <= Q(1);

108: PRBS_FEEDBACK <= (Q(0) xor Q(1));

109:

110: READ_PRBS_IN_TEST <= READ_PRBS_IN; --for test purposes only--

111:

112: end PRBS_RX_arch;


i NEED TO SET UP THE TEST BENCH CODE FOR IT. aNY HELP WILL BE APPRECIATED.