1 2 3 4 5 | const int num = 10; // 변수 num을 상수화 const int *ptr = &val; // 포인터 ptr을 이용해서 val1의 값을 변경할 수 없음 int *const ptr2 = &val2; // 포인터 ptr2가 상수화 됨 const int *const ptr3 = &val3; // 포인터 ptr3가 상수화 되었으며, ptr3를 이용해서 val3의 값을 변경할 수 없음 | cs |
전체 글
- 키워드 const의 의미 2015.02.05
- 설계 프로젝트 2013.06.05
- [부자되거루] 2013 Makerfaire 지원작품 2013.04.30
키워드 const의 의미
2015. 2. 5. 21:05
설계 프로젝트
2013. 6. 5. 17:09
----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 01:23:35 06/05/2013
-- Design Name:
-- Module Name: main - Behavioral
-- Project Name:
-- Target Devices:
-- Tool versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
entity main is
Port ( CLK_50M : in STD_LOGIC;
RF_START : in STD_LOGIC;
RF_UPDOWN : in STD_LOGIC_VECTOR (1 downto 0);
MOTOR : out STD_LOGIC_VECTOR (7 downto 0);
SEGMENT : out STD_LOGIC_VECTOR (6 downto 0));
end main;
architecture Behavioral of main is
signal rf_start_clk : std_logic;
signal rf_cnt : integer range -1 to 10 := 0;
signal rf_updown_clk : std_logic;
signal motor_clk : std_logic;
signal phase_cnt : std_logic_vector(2 downto 0);
signal phase_out : std_logic_vector(7 downto 0);
signal step_cnt : integer range 0 to 50000;
signal step_max : integer range 0 to 50000;
signal stop : std_logic;
signal start : std_logic;
begin
-----------------------------------------------------------------------------
--------------------------- Motor Clock Generator -------------------------------
----------------------------------------- MOTOR CLOCK : 50M/125000/2 = 200Hz
-----------------------------------------------------------------------------
process(start,CLK_50M)
variable cnt : integer range 0 to 125000;
begin
if start = '1' then
cnt := 0;
motor_clk <= '0';
elsif rising_edge(CLK_50M) then
if cnt >= 124999 then
cnt := 0;
motor_clk <= not motor_clk;
else
cnt := cnt + 1;
end if;
end if;
end process;
-----------------------------------------------------------------------------
----------------------------- Motor Phase Count -----------------------------
-----------------------------------------------------------------------------
process(start,motor_clk,phase_cnt)
begin
if start = '1' then
phase_cnt <= (others => '0');
elsif rising_edge(motor_clk) then
phase_cnt <= phase_cnt+1;
end if;
end process;
-----------------------------------------------------------------------------
----------------------------- Motor Phase Out -------------------------------
--------------------------------------------------------------- 1-2상 여자 방식
-----------------------------------------------------------------------------
process(start,phase_cnt)
begin
if start = '1' then
phase_out <= (others => '0');
else
case phase_cnt is
when "000" =>
phase_out <= "10000001";
when "001" =>
phase_out <= "11000011";
when "010" =>
phase_out <= "01000010";
when "011" =>
phase_out <= "01100110";
when "100" =>
phase_out <= "00100100";
when "101" =>
phase_out <= "00111100";
when "110" =>
phase_out <= "00011000";
when "111" =>
phase_out <= "10011001";
when others =>
phase_out <= "00000000";
end case;
end if;
end process;
-----------------------------------------------------------------------------
--------------------- RF UPDOWN SWITCH CLOCK Generator ----------------------
-------------------------------------------------------------- 50M/5M/2 = 5Hz
-----------------------------------------------------------------------------
process(CLK_50M)
variable cnt : integer range 0 to 5000000;
begin
if rising_edge(CLK_50M) then
if cnt >= 4999999 then
cnt := 0;
rf_updown_clk <= not rf_updown_clk;
else
cnt := cnt + 1;
end if;
end if;
end process;
-----------------------------------------------------------------------------
------------------------------ RF UP DOWN COUNT -----------------------------
-----------------------------------------------------------------------------
process(rf_updown_clk,RF_UPDOWN,stop,step_cnt)
begin
if rising_edge(rf_updown_clk) then
case RF_UPDOWN is
when "01" => rf_cnt <= rf_cnt + 1;
when "10" => rf_cnt <= rf_cnt - 1;
when others => null;
end case;
end if;
if rf_cnt < 0 then
rf_cnt <= 9;
elsif rf_cnt > 9 then
rf_cnt <= 0;
end if;
if stop='1' then
step_max <= rf_cnt * 400;
end if;
end process;
-----------------------------------------------------------------------------
--------------------------------- SEGMENT ---------------------------------
-----------------------------------------------------------------------------
process(rf_cnt,stop,step_cnt)
begin
if stop='1' then
case rf_cnt is
when 0 => SEGMENT <= "0111111";
when 1 => SEGMENT <= "0000110";
when 2 => SEGMENT <= "1011011";
when 3 => SEGMENT <= "1001111";
when 4 => SEGMENT <= "1100110";
when 5 => SEGMENT <= "1101101";
when 6 => SEGMENT <= "1111101";
when 7 => SEGMENT <= "0000111";
when 8 => SEGMENT <= "1111111";
when 9 => SEGMENT <= "1100111";
when others => SEGMENT <="0000000";
end case;
elsif stop='0' then
if step_cnt>0 and step_cnt<399 then
SEGMENT <= "0111111";
elsif step_cnt>=399 and step_cnt<799 then
SEGMENT <= "0000110";
elsif step_cnt>=799 and step_cnt<1199 then
SEGMENT <= "1011011";
elsif step_cnt>=1199 and step_cnt<1599 then
SEGMENT <= "1001111";
elsif step_cnt>=1599 and step_cnt<1999 then
SEGMENT <= "1100110";
elsif step_cnt>=1999 and step_cnt<2399 then
SEGMENT <= "1101101";
elsif step_cnt>=2399 and step_cnt<2799 then
SEGMENT <= "1111101";
elsif step_cnt>=2799 and step_cnt<3199 then
SEGMENT <= "0000111";
elsif step_cnt>=3199 and step_cnt<3599 then
SEGMENT <= "1111111";
elsif step_cnt=3599 then
SEGMENT <= "1100111";
end if;
end if;
end process;
-----------------------------------------------------------------------------
--------------------- RF START SWITCH CLOCK GENERATOR -----------------------
-------------------------------------- RF CLOCK : rf_clk : 50M/25000/2 = 1kHz
process(CLK_50M)
variable cnt : integer range 0 to 25000;
begin
if rising_edge(CLK_50M) then
if cnt >= 24999 then
cnt := 0;
rf_start_clk <= not rf_start_clk;
else
cnt := cnt + 1;
end if;
end if;
end process;
-----------------------------------------------------------------------------
------------------------------ RF START SWITCH ------------------------------
-----------------------------------------------------------------------------
process(rf_start_clk)
variable cnt : integer range 0 to 100;
begin
if RF_START = '0' then
start <= '0';
cnt := 0;
elsif rising_edge(rf_start_clk) then
cnt := cnt + 1;
if cnt = 100 then
start <= '1';
cnt := 0;
end if;
end if;
end process;
---------------------------- 1바퀴만 회전 후,정지 -----------------------------
process(start,motor_clk,step_cnt,stop)
begin
if start='1' then
stop <= '0'; step_cnt <=0;
elsif rising_edge(motor_clk) then
if step_cnt >= (step_max-1) then
stop <= '1';
step_cnt <= 0;
else
step_cnt <= step_cnt + 1;
end if;
end if;
end process;
-----------------------------------------------------------------------------
MOTOR(7) <= phase_out(7) when stop = '0' else '0';
MOTOR(6) <= phase_out(6) when stop = '0' else '0';
MOTOR(5) <= phase_out(5) when stop = '0' else '0';
MOTOR(4) <= phase_out(4) when stop = '0' else '0';
MOTOR(3) <= phase_out(3) when stop = '0' else '0';
MOTOR(2) <= phase_out(2) when stop = '0' else '0';
MOTOR(1) <= phase_out(1) when stop = '0' else '0';
MOTOR(0) <= phase_out(0) when stop = '0' else '0';
-----------------------------------------------------------------------------
end Behavioral;
result.mp4[부자되거루] 2013 Makerfaire 지원작품
2013. 4. 30. 02:29
2013 Makerfaire에 참가하기 위해서 준비중인 작품~!
아이들을 위한 저금통 "부자되거루"
부자되거루의 머리위에 동전 투입구가 있고
휨센서와 서보모터를 이용해서 500원짜리와 동전을 분류할 수 있다.
분류된 동전은 아래 같은 구조물로 들어가고 돈을 모두 모았을 때 배가 열리면서 돌려준다.
이제 동작을 위한 회로 사진이다.
Makerfaire 성격에 맞게 Arduino Mini를 사용하여 제작하였다.
하나의 보드에 서보모터, 금액표시 LCD, 금액 저장 SD카드를 모두 연결할 수 있게 제작했다.
LCD는 캥거루와 자연스럽게 어울리도록 꾸며보았다. 저금 할때마다 금액이 표시된다.
SD카드의 txt파일에 목표금액을 넣고 캥거루에 끼운 뒤 전원을 켜면 동작을 시작한다.
저금 금액역시 SD카드에 바로바로 저장되기 때문에 껐다켜도 그대로 저장되어있다.
목표금액과 저금금액이 일치했을 때만 배가 열리면서 동전을 돌려준다.
동전은 아이가 계산하기 쉽고 저금하기 쉽도록 100원과 500원을 분류해서 돌려준다.