9the
o20elseo21延时05se
dififca
t32499999the
o30elseo31延时05se
dififca
t42499999the
o40elseo41延时05se
difca
t1ca
t11加一计数ca
t2ca
t21加一计数ca
t3ca
t31加一计数ca
t4ca
t41加一计数e
dife
dprocesse
dbeh7、按键控制模块LIBRARYIEEEUSEIEEESTD_LOGIC_1164ALL
fUSEIEEESTD_LOGIC_UNSIGNEDALLENTITYco
trol2ISPORTCLKCHANGECCLKINSTD_LOGICCLK1OUTSTD_LOGICENDco
trol2ARCHITECTUREbehavOFco
trol2ISSIGNALMSTD_LOGICBEGINPROCESSCLKCHANGECCLKBEGINIFCHANGEEVENTANDCHANGE1THENMNOTMENDIFIFM1THENCLK1CCLKELSECLK1CLKENDIFENDPROCESSENDbehav8、数码管显示模块LIBRARYIEEEUSEIEEESTD_LOGIC_1164ALLUSEIEEESTD_LOGIC_UNSIGNEDALLENTITYDISPLAYISPORTCLKINSTD_LOGICSECINSTD_LOGIC_VECTOR7DOWNTO0MININSTD_LOGIC_VECTOR7DOWNTO0HOURINSTD_LOGIC_VECTOR7DOWNTO0sel0sel1sel2bufferSTD_LOGICSGOUTSTD_LOGIC_VECTOR7DOWNTO0ENDDISPLAYARCHITECTUREbehavOFDISPLAYISSIGNALASTD_LOGIC_VECTOR3DOWNTO0计数器的个，十SIGNALCNT8STD_LOGIC_VECTOR2DOWNTO0数码管选择BEGINP3PROCESSCLK数码管控制BEGINIFCLKEVENTANDCLK1THENIFCNT8