Homework SourseI am trying to control a servo motor HS422 using a Basys2 FP
I am trying to control a servo motor (HS-422) using a Basys2 FPGA. I also have a few IRF3708 transistors and an opti-coupler. How do you physically connect them? I\'ve never wired anything before and need step by step instructions, please!
Solution
Button controller
To test out the ServoDriver above, I made a little entity, that uses button presses to increment and decrement a counter. It’s fairly simple, the most tricky part is the conversions, to make sure it’s running unsigned all the time, especially when the 8bit ServoPos signal is wrapping around.
by considering the above program
use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.NUMERIC_STD.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity ServoDriver is Port ( Clk : in STD_LOGIC; Position : in STD_LOGIC_VECTOR (7 downto 0); Servo : out STD_LOGIC); end ServoDriver; architecture Behavioral of ServoDriver is constant ClockDiv: integer := 63; signal ClockTick: std_logic := \'0\'; signal ClockCount: std_logic_vector (6 downto 0) := \"0000000\"; signal PulseCount: std_logic_vector (11 downto 0) := \"000000000000\"; begin process (Clk) begin if Clk=\'1\' and Clk\'event then if ClockCount = ClockDiv-2 then ClockTick <= \'1\'; else ClockTick <= \'0\'; end if; if ClockTick=\'1\' then ClockCount <= \"0000000\"; else ClockCount <= ClockCount + 1; end if; end if; end process; process (Clk) begin if Clk=\'1\' and Clk\'event then if ClockTick=\'1\' then PulseCount <= PulseCount + 1; end if; if PulseCount < (\"0001\" & Position) then Servo <= \'1\'; else Servo <= \'0\'; end if; end if; end process; end Behavioral; |
