PoC.arith.counter_bcd

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Counter with output in binary coded decimal (BCD). The number of BCD digits is configurable by DIGITS.

All control signals (reset rst, increment inc) are high-active and synchronous to clock clk. The output val is the current counter state. Groups of 4 bit represent one BCD digit. The lowest significant digit is specified by val(3 downto 0).

Todo

  • implement a dec input for decrementing
  • implement a load input to load a value

Entity Declaration:

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entity arith_counter_bcd is
  generic (
    DIGITS : positive                           -- Number of BCD digits
  );
  port (
    clk : in  std_logic;
    rst : in  std_logic;                        -- Reset to 0
    inc : in  std_logic;                        -- Increment
    val : out T_BCD_VECTOR(DIGITS-1 downto 0)   -- Value output
  );
end entity;