位數(shù)碼管掃描顯示電路

1、實(shí) 驗(yàn) 報(bào) 告課程名稱(chēng) EDA技術(shù)實(shí)用教程實(shí)驗(yàn)名稱(chēng) 位數(shù)碼管掃描顯示電路設(shè)計(jì)實(shí)驗(yàn)類(lèi)型 驗(yàn)證學(xué)院名稱(chēng) 電子信息工程學(xué)院 專(zhuān)業(yè) 電子信息工程（自動(dòng)化）年級(jí)班別 10級(jí)電子信息工程3班 開(kāi)出學(xué)期 1213上期學(xué)生姓名 學(xué)號(hào) 實(shí)驗(yàn)教師 成績(jī)2012年11月9日實(shí)驗(yàn)一：位數(shù)碼管掃描顯示電路設(shè)計(jì)一、實(shí)驗(yàn)?zāi)康?實(shí)現(xiàn)位數(shù)碼管掃描顯示電路設(shè)計(jì)二、實(shí)驗(yàn)原理8位數(shù)碼掃描顯示電路，其中每個(gè)數(shù)碼管的8個(gè)段：h, g, f, e, d, c, b, a （h 是小數(shù)點(diǎn)）都分別連在一起，8個(gè)數(shù)碼管分別由8個(gè)選通信號(hào)k1, k2, k3, k8來(lái)選擇。被選通的數(shù)碼管顯示數(shù)據(jù)，其余關(guān)閉。如在某一時(shí)刻，k3為高電平，其余選通信號(hào)

2、為低電平，這是僅k3對(duì)應(yīng)的數(shù)碼管顯示來(lái)自段信號(hào)端的數(shù)據(jù)，其余7個(gè)數(shù)碼管呈現(xiàn)關(guān)閉狀態(tài)。根據(jù)這種電路狀況，如果希望在8個(gè)數(shù)碼管顯示希望的數(shù)據(jù)，就必須使得8個(gè)選通信號(hào)k1, k2, k3, k8分別被單獨(dú)選通，并在此同時(shí)，在段信號(hào)輸入口加上希望在該對(duì)應(yīng)數(shù)碼管上顯示的數(shù)據(jù)，于是隨著選通信號(hào)的掃變，就能實(shí)現(xiàn)掃描顯示的目的。三、實(shí)驗(yàn)內(nèi)容：設(shè)計(jì)程序如下：LIBRARY IEEE;ENTITY SCAN_LED IS PORT ( CLK : IN STD_LOGIC; SG : OUT STD_LOGIC_VECTOR(6 DOWNTO 0;-段控制信號(hào)輸出BT : OUT STD_LOGIC_VECTOR

3、(2 DOWNTO 0 ;-位控制信號(hào)輸出END;ARCHITECTURE one OF SCAN_LED ISSIGNAL CNT8 : STD_LOGIC_VECTOR(2 DOWNTO 0; SIGNAL A : INTEGER RANGE 0 TO 15;BEGINPROCESS( CNT8 BEGINCASE CNT8 ISWHEN "000" => BT <= "000" ; A <= 0 ;WHEN "001" => BT <= "001" ; A <= 7 ; W

4、HEN "010" => BT <= "010" ; A <= 0 ;WHEN "011" => BT <= "011" ; A <= 1;WHEN "100" => BT <= "100" ; A <= 4 ;WHEN "101" => BT <= "101" ; A <= 3 ;WHEN "110" => BT <= "

5、110" ; A <= 5 ;WHEN "111" => BT <= "111" ; A <= 7 ;WHEN OTHERS => NULL ;END CASE ;END PROCESS P1;PROCESS(CLKBEGINIF CLK'EVENT AND CLK = '1' THEN CNT8 <= CNT8 + 1; END IF;END PROCESS P2 ; PROCESS( A BEGINCASE A ISWHEN 0 => SG <= "01111

6、11" WHEN 1 => SG <= "0000110" WHEN 2 => SG <= "1011011" WHEN 3 => SG <= "1001111" WHEN 4 => SG <= "1100110" WHEN 5 => SG <= "1101101" WHEN 6 => SG <= "1111101" WHEN 7 => SG <= "0000111&quo

7、t;WHEN 8 => SG <= "1111111" WHEN 9 => SG <= "1101111" WHEN 10=> SG <= "1110111" WHEN 11 => SG <= "1111100"WHEN 12=> SG <= "0111001" WHEN 13 => SG <= "1011110" WHEN 14=> SG <= "1111001" WHEN 15 => SG <= "1110001"WHEN OTHERS => NULL ;END CASE ;END PROCESS P3; END;四、仿真結(jié)果五、實(shí)驗(yàn)結(jié)論本次實(shí)驗(yàn)為設(shè)計(jì)性實(shí)驗(yàn)，旨在鍛煉我們的思維能力，需要我們?cè)谡n后將實(shí)驗(yàn)設(shè)計(jì)好，這不僅需要對(duì)書(shū)本上的知識(shí)有比較詳細(xì)