dtkien
Tổng số bài gửi : 12
Join date : 30/09/2011
Age : 38
 |  Tiêu đề: GIUP MINH VOI  Mon Oct 31, 2011 12:21 am | |
| BAN NAO LAM MAY VI DU TRONG SACH ROI CHI MINH VOI MINH LAM DOAN CODE NAY NHUNG CON 1 LOI NUA TIM HOAI MA KHONG RA CO BAN NAO BIET CHI MINH VOI NHE.
THANK NHIEU - Trích dẫn :
- LIBRARY IEEE;
USE IEEE.std_logic_1164.ALL;
ENTITY DEM_TANG IS
PORT (load, clear, clk: IN std_logic;
data_in: IN INTEGER;
data_out: OUT INTEGER);
END DEM_TANG;
ARCHITECTURE count_255 OF DEM_TANG IS
BEGIN
PROCESS(clk)
VARIABLE count: INTEGER := 0;
BEGIN
IF clear = '1' THEN
count := 0;
ELSIF load = '1' THEN
count := data_in;
ELSE
IF (clk'EVENT) AND (clk = '1') AND
(clk'LAST_VALUE = '0') THEN
IF (count = 255) THEN
count := 0;
ELSE
count := count + 1;
END IF;
END IF;
END IF;
data_out <= count;
END PROCESS;
END count_255;
ARCHITECTURE count_64k OF DEM_TANG IS
BEGIN
PROCESS(clk)
VARIABLE count : INTEGER := 0;
BEGIN
IF clear = '1' THEN
count := 0;
ELSIF load = '1' THEN
count := data_in;
ELSE
IF (clk'EVENT) AND (clk = '1') AND
(clk'LAST_VALUE = '0') THEN
IF (count = 65535) THEN
count := 0;
ELSE
count := count + 1;
END IF;
END IF;
END IF;
data_out <= count;
END PROCESS;
END count_64k;
CONFIGURATION small_count OF DEM_TANG IS
FOR count_255
END FOR;
END small_count;
CONFIGURATION big_count OF DEM_TANG IS
FOR count_64k
END FOR;
END big_count;
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