步进电机定位操控体系VHDL程序与仿真
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; –体系复位信号
dir: in STD_LOGIC; –方向操控信号
clk: in STD_LOGIC; –体系时钟信号
ini: in STD_LOGIC; –初始化使能信号
manner: in STD_LOGIC_VECTOR (1 downto 0); –激磁方法的选择开关
angle: in INTEGER range 255 downto 0; —步进角的倍数设定输入
baBA: out STD_LOGIC_VECTOR (3 downto 0)); —步进电机状况输出
end step_motor;
architecture stepmotor_arch of step_motor is
signal count: INTEGER range 0 to 7; –计数器
signal cntInc: INTEGER range -2 to 2; –设定累加器所需的累（加/减）计数值
signal cc : integer range 0 to 3;
signal cntIni: INTEGER range -1 to 0; –设定累加器所需的计数初值
signal angleDnCount: INTEGER range 255 downto 0; –核算现已转过的步进角
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-?相鼓励
–count=0;
cntIni=0;
cntInc=2;
angleDnCntDec=2;–10;
when 2 => — 2-?相鼓励
–count=7;
cntIni=-1;
cntInc=2;
angleDnCntDec=2;–10;
when 3 => — 1-2?相鼓励
–count=0;
cntIni=0;
cntInc=1;
angleDnCntDec=1;–01;
when 0 => –manner=00 autodetect
if (angle rem 2) =1 then — 2-?相鼓励
–count=7;
cntIni=-1;
cntInc=2;
angleDnCntDec=2;–10;
else — 1-?相鼓励
–count=0;
cntIni=0;
cntInc=2;
angleDnCntDec=2;–10;
end if; –angle
end case; –manner
else — if dir=’1′
case cc is
when 1 => — 1-?相鼓励
–count=0;
cntIni=0;
cntInc=-2;
angleDnCntDec=2;–10;
when 2 => — 2-?相鼓励
–count=7;
cntIni=-1;
cntInc=-2;
angleDnCntDec=2;–10;
when 3 => — 1-2?相鼓励
–count=0;
cntIni=0;
cntInc=-1;
angleDnCntDec=1;–01;
when 0 => –manner=00 autodetect
if (angle rem 2) = 1 then — 2-?相鼓励
cntIni=-1;
cntInc=-2;
angleDnCntDec=2;–10;
else — 1-?相鼓励
cntIni=0;
cntInc=-2;
angleDnCntDec=2;–10;
end if; –angle
end case; –manner
end if; — else dir=0
–end if; — ini
end process;
counting_reset: process(reset,ini, angle, clk)
begin
if reset=’1′ then
count=0;
angleDnCount=0;
elsif clk’event and clk=’1′ then
if ini=’0′ then
count=0+cntIni;
angleDnCount=angle;
else
count = count+cntInc;
if angleDnCount > angleDnCntDec then
angleDnCount = angleDnCount-angleDnCntDec;
else
angleDnCount = 0;
end if;
end if;
end if;
end process;
baBA =0000 when angleDnCount=0 else
0001 when count=0 else
0011 when count=1 else
0010 when count=2 else
0110 when count=3 else
0100 when count=4 else
1100 when count=5 else
1000 when count=6 else
1001;– when count>=7;
end stepmotor_arch;
