library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;

entity step_motor is
port (reset:in STD_LOGIC; --系統復位信號
      dir: in STD_LOGIC; --方向控制信號
      clk: in STD_LOGIC; --系統時鐘信號
      ini: in STD_LOGIC; --初始化使能信號 
      manner: in STD_LOGIC_VECTOR (1 downto 0); --激磁方式的選擇開關
      angle: in INTEGER range 255 downto 0; --步進角的倍數設定輸入
      baBA: out STD_LOGIC_VECTOR (3 downto 0)); --步進電機狀態輸出
end step_motor;

architecture stepmotor_arch of step_motor is
signal count: INTEGER range 0 to 7; --計數器 
signal cntInc: INTEGER range -2 to 2; --設定累加器所需的累（加/減）計數值
signal cc : integer range 0 to 3;
signal cntIni: INTEGER range -1 to 0; --設定累加器所需的計數初值
signal angleDnCount: INTEGER range 255 downto 0;  --計算已經轉過的步進角
signal angleDnCntDec: INTEGER range 2 downto 1; 
begin

  process(dir, manner, angle)--, ini)
  begin
      --if ini='1' then
      cc<=conv_integer(manner);
      if dir='0' then	
          case cc is
              when 1 => -- 1-