daq_header Package Body Reference

Functions used in DAQ modules. More...

List of all members.

Package >> daq_header

Functions
std_logic_vector	reverse_any_vector ( a: in std_logic_vector )
	bit reversal of any vector
integer	cnt_ones ( vec_in: in std_logic_vector(31 downto 0) )
	count bits equal '1'
std_logic	dec13 ( D: in std_logic_vector (2 downto 0) )
	1 out of 3 decoder
std_logic	dec23 ( DAT: in std_logic_vector (2 downto 0) )
	2 out of 3 decoder
std_logic	ris_pattern ( A: in std_logic_vector (3 downto 0) )
	pattern for rising edge
std_logic	ris_hole_pattern ( A: in std_logic_vector (3 downto 0) )
	pattern for rising edge hole
std_logic	fal_pattern ( A: in std_logic_vector (3 downto 0) )
	pattern for falling edge
std_logic	fal_hole_pattern ( A: in std_logic_vector (3 downto 0) )
	pattern for falling edge hole
std_logic	spike_suppress ( A: in std_logic_vector (2 downto 0) )
	pattern for spike suppression
std_logic	or_check_long ( B: in std_logic_vector (31 downto 0) )
	OR over all elements of a 32 bit vector.
std_logic	or_check ( B: in std_logic_vector (31 downto 0) )
	logical OR over vector with period of 8 bits
integer	lowest_zero ( b: in std_logic_vector (2 downto 0) )
	returns index in integer of the lowest zero in a 3 bit vector

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Detailed Description

Functions used in DAQ modules.

Definition at line 69 of file daq_header.vhd.

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Member Function Documentation

[Function]

integer cnt_ones

( vec_in in std_logic_vector(31 downto 0) )

count bits equal '1'

Definition at line 85 of file daq_header.vhd.

  function cnt_ones (vec_in : std_logic_vector(31 downto 0))
    return integer is
    variable cnt : integer range 0 to vec_in'length := 0;
  begin
    for i in 0 to (vec_in'length)-1 loop
      if vec_in(i) = '1' then
        cnt := cnt + 1;
      end if;
    end loop;  -- i
    return cnt;
  end cnt_ones;

[Function]

std_logic dec13

( D in std_logic_vector (2 downto 0) )

1 out of 3 decoder

Definition at line 98 of file daq_header.vhd.

  function dec13 (D : std_logic_vector (2 downto 0))
    return std_logic is
    variable R                : std_logic := '0';
    variable a, b, c, e, f, g : std_logic := '0';
  begin
    a := D(2);
    b := D(1);
    c := D(0);
    g := not(a);
    e := not(b);
    f := not(c);
    if ((a and e and f) or (g and b and f) or (g and e and c)) = '1' then
      R := '1';
    else
      R := '0';
    end if;
    return R;
  end dec13;

[Function]

std_logic dec23

( DAT in std_logic_vector (2 downto 0) )

2 out of 3 decoder

Definition at line 118 of file daq_header.vhd.

  function dec23 (DAT : std_logic_vector (2 downto 0))
    return std_logic is
    variable X                : std_logic := '0';
    variable a, b, c, e, f, g : std_logic := '0';
  begin
    a := DAT(2);
    b := DAT(1);
    c := DAT(0);
    g := not(a);
    e := not(b);
    f := not(c);
    X := (a and b and f) or (a and e and c) or (g and b and c);
    return X;
  end dec23;

[Function]

std_logic fal_hole_pattern

( A in std_logic_vector (3 downto 0) )

pattern for falling edge hole

Definition at line 155 of file daq_header.vhd.

  function fal_hole_pattern (A : std_logic_vector (3 downto 0))
    return std_logic is
  begin
    return (A(3) and (not A(2)) and A(1) and A(0));
  end fal_hole_pattern;

[Function]

std_logic fal_pattern

( A in std_logic_vector (3 downto 0) )

pattern for falling edge

Definition at line 148 of file daq_header.vhd.

  function fal_pattern (A : std_logic_vector (3 downto 0))
    return std_logic is
  begin
    return ((not A(0)) and (not A(1)) and A(2) and A(3));
  end fal_pattern;

[Function]

integer lowest_zero

( b in std_logic_vector (2 downto 0) )

returns index in integer of the lowest zero in a 3 bit vector

Definition at line 190 of file daq_header.vhd.

  function lowest_zero (b : std_logic_vector (2 downto 0))
    return integer is
    variable R : integer range 0 to 3 := 0;
  begin
    if b(0) = '0' then
      R := 0;
    elsif b(1) = '0' then
      R := 1;
    elsif b(2) = '0' then
      R := 2;
    else
      R := 3;
    end if;
    return R;
  end lowest_zero;

[Function]

std_logic or_check

( B in std_logic_vector (31 downto 0) )

logical OR over vector with period of 8 bits

Definition at line 180 of file daq_header.vhd.

  function or_check (B : std_logic_vector (31 downto 0))
    return std_logic is
    variable R : std_logic := '0';
  begin
    R := B(31) or B(30) or B(29) or B(28) or B(27) or B(26) or B(25) or B(24);
    return R;
  end or_check;

[Function]

std_logic or_check_long

( B in std_logic_vector (31 downto 0) )

OR over all elements of a 32 bit vector.

Definition at line 169 of file daq_header.vhd.

  function or_check_long (B : std_logic_vector (31 downto 0))
    return std_logic is
    variable R : std_logic := '0';
  begin
    R := B(31) or B(30) or B(29) or B(28) or B(27) or B(26) or B(25) or B(24) or B(23) or B(22) or B(21) or B(20)
         or B(19) or B(18) or B(17) or B(16) or B(15) or B(14) or B(13) or B(12) or B(11) or B(10) or B(9) or B(8)
         or B(7) or B(6) or B(5) or B(4) or B(3) or B(2) or B(1) or B(0);
    return R;
  end or_check_long;

[Function]

std_logic_vector reverse_any_vector

( a in std_logic_vector )

bit reversal of any vector

Definition at line 73 of file daq_header.vhd.

  function reverse_any_vector (a : in std_logic_vector)
    return std_logic_vector is
    variable result : std_logic_vector(a'range);
    alias aa        : std_logic_vector(a'reverse_range) is a;
  begin
    for i in aa'range loop
      result(i) := aa(i);
    end loop;
    return result;
  end reverse_any_vector;

[Function]

std_logic ris_hole_pattern

( A in std_logic_vector (3 downto 0) )

pattern for rising edge hole

Definition at line 141 of file daq_header.vhd.

  function ris_hole_pattern (A : std_logic_vector (3 downto 0))
    return std_logic is
  begin
    return (A(3) and A(2) and (not A(1)) and A(0));
  end ris_hole_pattern;

[Function]

std_logic ris_pattern

( A in std_logic_vector (3 downto 0) )

pattern for rising edge

Definition at line 134 of file daq_header.vhd.

  function ris_pattern (A : std_logic_vector (3 downto 0))
    return std_logic is
  begin
    return ((not A(3)) and (not A(2)) and A(1) and A(0));
  end ris_pattern;

[Function]

std_logic spike_suppress

( A in std_logic_vector (2 downto 0) )

pattern for spike suppression

Definition at line 162 of file daq_header.vhd.

  function spike_suppress (A : std_logic_vector (2 downto 0))
    return std_logic is
  begin
    return not ((not A(2)) and A(1) and (not A(0)));
  end spike_suppress;

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The documentation for this class was generated from the following file:

• daq_header.vhd