多位8段數(shù)碼管的控制

1、數(shù)碼管的控制設(shè)計(jì)一個(gè)電子時(shí)鐘1數(shù)碼管外觀2各種各樣的數(shù)碼管3共陰、共陽(yáng)4原理圖5FPGA相關(guān)引腳set_location_assignment PIN_239 -to seg0 # Aset_location_assignment PIN_224 -to seg1 # Bset_location_assignment PIN_227 -to seg2 # Cset_location_assignment PIN_236 -to seg3 # Dset_location_assignment PIN_237 -to seg4 # Eset_location_assignment PIN_234

2、-to seg5 # Fset_location_assignment PIN_226 -to seg6 # Gset_location_assignment PIN_233 -to seg7 # Hset_location_assignment PIN_221 -to segcs0set_location_assignment PIN_222 -to segcs1set_location_assignment PIN_223 -to segcs2set_location_assignment PIN_225 -to segcs3set_location_assignment PIN_228

3、-to segcs4set_location_assignment PIN_235 -to segcs5set_location_assignment PIN_238 -to segcs6set_location_assignment PIN_240 -to segcs76譯碼process(second0)begin case second0 is when 0000 =sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto

4、0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)sec0Seg(7 downto 0)=11111111; end case;end process;7多位控制process(clk_fresh)-位選信號(hào)（掃描時(shí)間1MS）variable cnt : std_logic_vector(2 downto 0);begin if (clk_freshevent and clk_fresh=1) then cnt:=cnt+1; if cnt=001 then segcs=00010000;

5、seg=min1Seg; -min elsif cnt=010 then segcs=00001000;seg=min0Seg; -8計(jì)時(shí)器Process(clk_1hz)BeginIf clk_1hzevent and clk_1hz=1 then if sec0 9 then sec0 = sec0 + 1; else sec0 = 0; if sec15 then sec1 = sec1 + 1; else sec1 = 0; if min09 then min0 = min0 + 1; else min0 = 0; if min15 then min1 = min1 + 1; else

6、 min1 = 0; if hour09 then hour0 = hour0 + 1; else hour0 = 0; if hour12 then hour1 = hour1+1; else hour1 = 0; end if;9時(shí)鐘準(zhǔn)備process(clk)- -1KHZ；用于數(shù)碼管掃描信號(hào)variable cnt : integer range 0 to 50000;-定時(shí)1MSbegin if clkevent and clk=1 then cnt:=cnt+1; if cnt25000 then clk_fresh=1; elsif cnt50000 then clk_fresh=0; else cnt:=0;clk_fresh=0; end if; end if;end process;process(clk_fresh)-此進(jìn)程產(chǎn)生1S的脈沖信號(hào)( clk_fresh為1K的脈沖信號(hào))variable cnt : integer range 0 to 1000;begin if clk_freshevent and clk_fresh=1 then cnt:=cnt+1; if cnt500 th