library ieee;
USE IEEE.std_logic_1164.all; --
USE IEEE.numeric_std.ALL;
USE IEEE.math_complex.ALL;
USE IEEE.math_real.ALL;
USE IEEE.numeric_bit.ALL;
USE IEEE.std_logic_unsigned.all;
USE IEEE.std_logic_signed.all;
USE IEEE.std_logic_arith.ALL; ---- --
entity P_ACOShalfup is
PORT(
clock0 : IN std_logic;
clk : IN std_logic;
reset : IN std_logic;
clk_enable : IN std_logic;
sqrtin1 : IN std_logic_vector(13 downto 0);
sqrtin2 : IN std_logic_vector(13 downto 0);
alfaout : OUT std_logic_vector(15 downto 0)
);
end P_ACOShalfup; --
architecture rtl of P_ACOShalfup is
SIGNAL q50KHZ : std_logic;
SIGNAL input409upKHZ : std_logic;
SIGNAL input409downKHZ : std_logic;
SIGNAL switch_up : std_logic;
SIGNAL switch_down : std_logic;
SIGNAL q409K : std_logic;
SIGNAL uptbl_flag : std_logic:='0';
SIGNAL downtbl_flag : std_logic:='0';
SIGNAL Clear_halfupflag : std_logic:='0';
SIGNAL Clear_halfdownflag : std_logic:='0';
SIGNAL uptbl_addr : unsigned(13 downto 0):="00000000000000";
SIGNAL downtbl_addr : unsigned(13 downto 0):="00000000000000";
SIGNAL input_register1 : signed(13 DOWNTO 0) :="00000000000000";--
SIGNAL buff_data : unsigned(15 downto 0):="0000000000000000"; --16bit max65535
SIGNAL output_register : UNSIGNED(15 DOWNTO 0):="0000000000000000";--
SIGNAL count_halfupwaveClock : UNSIGNED(13 DOWNTO 0):="00000000000000"; --记忆在上半波10ms内有多少个409KH脉冲
SIGNAL count_halfdownwaveClock : UNSIGNED(13 DOWNTO 0):="00000000000000"; --记忆在下半波10ms内有多少个409KH脉冲
SIGNAL datain : signed(13 downto 0):="00000000000000";
SIGNAL indatauA : signed(13 downto 0):="00000000000000";
SIGNAL indatauB : signed(13 downto 0):="00000000000000";
begin
input409upKHZ <= switch_up AND q409K;
input409downKHZ <= switch_down AND q409K;
----------------------------------------
q409KHZ:PROCESS(clock0)
VARIABLE cout:integer:=0;
BEGIN
IF clock0'EVENT AND clock0='1' THEN
cout:=cout+1;
IF cout<=122 THEN
q409K <= '0';
ELSIF cout<244 THEN
q409K <= '1';
ELSE cout:=0;
END IF;
END IF;
END PROCESS q409KHZ;
----------------------------------------
q50KH:PROCESS(clock0)
VARIABLE cout:INTEGER:=0;
BEGIN
IF clock0'EVENT AND clock0='1' THEN
cout:=cout+1;
IF cout<=1000 THEN q50KHZ<='0';
ELSIF cout<2000 THEN q50KHZ<='1'; ---2000 x 50KHz=100MHz
ELSE cout:=0;
END IF;
END IF;
END PROCESS q50KH;
---------上半波对409KHz脉冲记数---------
Pulse_upEstablish_Phase:PROCESS(input409upKHZ ,reset) -- 引入409KHZ
BEGIN
IF reset = '0' THEN
count_halfupwaveClock <= "00000000000000";
ELSIF input409upKHZ'event AND input409upKHZ = '1' THEN
IF clk_enable = '1' THEN
count_halfupwaveClock <= count_halfupwaveClock+"00000000000001"; ---上半波来一个脉冲累加一个
END IF;
END IF;
IF Clear_halfupflag = '1' THEN
count_halfupwaveClock <= "00000000000000";
END IF;
END PROCESS Pulse_upEstablish_Phase;
---------下半波对409KHz脉冲记数---------
Pulse_downEstablish_Phase:PROCESS(input409downKHZ ,reset) -- 引入409KHZ
BEGIN
IF reset = '0' THEN
count_halfdownwaveClock <= "00000000000000";
ELSIF input409downKHZ'event AND input409downKHZ= '1' THEN
IF clk_enable = '1' THEN
count_halfdownwaveClock <= count_halfdownwaveClock+"00000000000001"; ---下半波来一个脉冲累加一个
END IF;
END IF;
IF Clear_halfdownflag = '1' THEN
count_halfdownwaveClock <= "00000000000000";
END IF;
END PROCESS Pulse_downEstablish_Phase;
-------------------------------------------------------
input_reg_process : PROCESS (q50KHZ, reset) -- 引入50KHZ
VARIABLE ahead_up:integer :=0;
VARIABLE ahead_down:integer :=0;
VARIABLE fellow_up:integer :=0;
VARIABLE fellow_down:integer :=0;
BEGIN
IF reset = '0' THEN
input_register1 <= "00000000000000";
ELSIF q50KHZ'event AND q50KHZ = '1' THEN
IF clk_enable = '1' THEN
input_register1 <= datain;
END IF;
END IF;
---------------------------------------------------
if(input_register1>0)then
switch_up <= '1';
switch_down <= '0';
Clear_halfdownflag <= '1';
Clear_halfupflag <= '0';
fellow_down := 0;
ahead_down := 0;
fellow_up := CONV_INTEGER(datain);
if(fellow_up /= ahead_up)then
uptbl_flag <= '1';
uptbl_addr <= count_halfupwaveClock; ---获得查表地址
ahead_up:= fellow_up;
else
uptbl_flag <= '0';
end if;
end if;
---------------------------------------------------
if(input_register1<0)then
switch_up <= '0';
switch_down <= '1';
Clear_halfupflag <= '1';
Clear_halfdownflag <= '0';
fellow_up := 0;
ahead_up := 0;
fellow_down := CONV_INTEGER(datain);
if(fellow_down /= ahead_down)then
downtbl_flag <= '1'; ---上半波数据发生变化，置上半表查表标志
downtbl_addr <= count_halfdownwaveClock; ---获得查表地址
ahead_down:= fellow_down;
else
downtbl_flag <= '0';
end if;
end if;
END PROCESS input_reg_process;
main:process(clk ,reset)
VARIABLE UPVALUE,DOWNVALUE,result: INTEGER:=0;
begin
--------------------该段程序用于测试及查表调速---------------------------------------------------
IF reset = '0' THEN
datain <= "00000000000000";
ELSIF clk'event AND clk = '1' THEN
IF clk_enable = '1' THEN
indatauA <= sqrtin1;
indatauB <= sqrtin2;
UPVALUE:=CONV_INTEGER(indatauA);
DOWNVALUE:=CONV_INTEGER(indatauB);
result:=UPVALUE/DOWNVALUE;
--datain <= CONV_SIGNED(-1,14)*sqrtin3/sqrtin4; ---- -ACOS(U1/U2)
datain <= CONV_SIGNED(result,14);
END IF;
END IF;
----------------------该段结束------------------------------------------------------------------
--------------查上表，4096个值，其后是查下表4096个值，合计8092个值---------------------------------
if(uptbl_flag ='1')then
case uptbl_addr is
when CONV_UNSIGNED(1,14)=>buff_data<=CONV_UNSIGNED(47128,16);
when CONV_UNSIGNED(2,14)=>buff_data<=CONV_UNSIGNED(47133,16);
when CONV_UNSIGNED(3,14)=>buff_data<=CONV_UNSIGNED(47138,16);
when CONV_UNSIGNED(4,14)=>buff_data<=CONV_UNSIGNED(47143,16);
when CONV_UNSIGNED(5,14)=>buff_data<=CONV_UNSIGNED(47148,16);
when CONV_UNSIGNED(6,14)=>buff_data<=CONV_UNSIGNED(47153,16);
when CONV_UNSIGNED(7,14)=>buff_data<=CONV_UNSIGNED(47158,16);
when CONV_UNSIGNED(8,14)=>buff_data<=CONV_UNSIGNED(47162,16);
when CONV_UNSIGNED(9,14)=>buff_data<=CONV_UNSIGNED(47167,16);
when CONV_UNSIGNED(10,14)=>buff_data<=CONV_UNSIGNED(47172,16);
when CONV_UNSIGNED(11,14)=>buff_data<=CONV_UNSIGNED(47177,16);
when CONV_UNSIGNED(12,14)=>buff_data<=CONV_UNSIGNED(47182,16);
when CONV_UNSIGNED(13,14)=>buff_data<=CONV_UNSIGNED(47187,16);
when CONV_UNSIGNED(14,14)=>buff_data<=CONV_UNSIGNED(47192,16);
when CONV_UNSIGNED(15,14)=>buff_data<=CONV_UNSIGNED(47197,16);
when CONV_UNSIGNED(16,14)=>buff_data<=CONV_UNSIGNED(47202,16);
when CONV_UNSIGNED(17,14)=>buff_data<=CONV_UNSIGNED(47206,16);
when CONV_UNSIGNED(18,14)=>buff_data<=CONV_UNSIGNED(47211,16);
when CONV_UNSIGNED(19,14)=>buff_data<=CONV_UNSIGNED(47216,16);
when CONV_UNSIGNED(20,14)=>buff_data<=CONV_UNSIGNED(47221,16);
when CONV_UNSIGNED(21,14)=>buff_data<=CONV_UNSIGNED(47226,16);
when CONV_UNSIGNED(22,14)=>buff_data<=CONV_UNSIGNED(47231,16);
when CONV_UNSIGNED(23,14)=>buff_data<=CONV_UNSIGNED(47236,16);
when CONV_UNSIGNED(24,14)=>buff_data<=CONV_UNSIGNED(47241,16);
when CONV_UNSIGNED(25,14)=>buff_data<=CONV_UNSIGNED(47245,16);
when CONV_UNSIGNED(26,14)=>buff_data<=CONV_UNSIGNED(47250,16);
when CONV_UNSIGNED(27,14)=>buff_data<=CONV_UNSIGNED(47255,16);
when CONV_UNSIGNED(28,14)=>buff_data<=CONV_UNSIGNED(47260,16);
when CONV_UNSIGNED(29,14)=>buff_data<=CONV_UNSIGNED(47265,16);
when CONV_UNSIGNED(30,14)=>buff_data<=CONV_UNSIGNED(47270,16);
when CONV_UNSIGNED(31,14)=>buff_data<=CONV_UNSIGNED(47275,16);
。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。
。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。
when CONV_UNSIGNED(4093,14)=>buff_data<=CONV_UNSIGNED(47109,16);
when CONV_UNSIGNED(4094,14)=>buff_data<=CONV_UNSIGNED(47114,16);
when CONV_UNSIGNED(4095,14)=>buff_data<=CONV_UNSIGNED(47119,16);
when CONV_UNSIGNED(4096,14)=>buff_data<=CONV_UNSIGNED(47123,16);
when others =>buff_data<=CONV_UNSIGNED(47123,16);
end case;
output_register <= buff_data;
end if;
end process main;
alfaout <= output_register; --查表数据最终放大10000倍，适应0-65535范围正余弦查表，并与2/3pi*10000相加减
end rtl;
在板子上验证过，程序的数据表段用excell生成，拷贝到开发环境里，不然累死人滴
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