control stepper using de0 nano

[Altera_Forum]

hii.... 

 how to control a stepper motor that can move 50 degrees?

[Altera_Forum]

I guess you need to calculate, how many pulses you need to send to your motor to move these 50 degree and send them with suitable (low enough) frequency.

[Altera_Forum]

1.8 degrees in one step<><> 

this my program.,. but still looping. how to stop it in order to move 30 degrees only   library IEEE; use ieee.std_logic_1164.all; entity stepper is port ( CLK : in std_logic;  tombol_arah : in std_logic;   STEP_D : out std_logic_vector (3 downto 0)  ); end stepper;  Architecture behavioral of stepper is signal cnt : integer range 0 to 3; signal cnt_1 : integer range 0 to 3; begin  process (CLK) is  begin  if (CLK'event and CLK = '1') then    case cnt is  when 0=>  STEP_D <= "1001";  when 1=>  STEP_D <= "0001";  when 2=>  STEP_D <= "0011";  when 3=>  STEP_D <= "0010";   end case;  end if;   end process;  process (CLK)  begin  if(CLK' event and CLK = '1') then  if cnt = 3 then  cnt <= 0;  else  cnt <= cnt+1;   end if;  end if; end process; end behavioral;

[Altera_Forum]

1.8 degrees in one step<><> 

this my program.,. but still looping. how to stop it in order to move 30 degrees only   library IEEE; use ieee.std_logic_1164.all; entity steper is port ( CLK : in std_logic;  tombol_arah : in std_logic;   STEP_D : out std_logic_vector (3 downto 0)  ); end steper;  Architecture behavioral of steper is signal cnt : integer range 0 to 3; signal cnt_1 : integer range 0 to 3; begin  process (CLK) is  begin  if (CLK'event and CLK = '1') then    case cnt is  when 0=>  STEP_D <= "1001";  when 1=>  STEP_D <= "0001";  when 2=>  STEP_D <= "0011";  when 3=>  STEP_D <= "0010";   end case;  end if;   end process;  process (CLK)  begin  if(CLK' event and CLK = '1') then  if cnt = 3 then  cnt <= 0;  else  cnt <= cnt+1;   end if;  end if; end process; end behavioral;

[Altera_Forum]

Add another counter, that counts 30 or 50 degrees and when it reaches the certain value it stops rotation. Use enable signal in first process and add a wider counter to the second process.