电子时钟优质PPT.ppt

电子时钟优质PPT.ppt

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SEG_SEL:

OUTSTD_LOGIC_VECTOR（2DOWNTO0）;

SEG_DA:

OUTSTD_LOGIC_VECTOR（7DOWNTO0）;

ENDTIMER;

ARCHITECTUREADOOFTIMERISCOMPONENTCNT10PORT（CLK:

RST:

CIN:

CNT_VAL:

OUTSTD_LOGIC_VECTOR（3DOWNTO0）;

COUT:

OUTSTD_LOGIC）;

ENDCOMPONENT;

COMPONENTCNT6PORT（CLK:

COMPONENTCNT2PORT（CLK:

INOUTSTD_LOGIC_VECTOR（3DOWNTO0）;

COMPONENTCNT4PORT（CLK:

SIGNALS_BUF1,S_BUF2,S_BUF3,S_BUF4:

STD_LOGIC_VECTOR（3DOWNTO0）;

SIGNALS_BUF5,S_BUF6,S_BUF7,S_BUF8:

SIGNALS_CNT:

STD_LOGIC_VECTOR（2DOWNTO0）;

SIGNALS_TEMP:

SIGNALCOUT:

STD_LOGIC_VECTOR（5DOWNTO0）;

SIGNALCLK:

STD_LOGIC;

BEGIN,PROCESS（CLK3）BEGINIFCLK3EVENTANDCLK3=1THENCLK=NOTCLK;

ENDIF;

ENDPROCESS;

PROCESS（CLK,RST1）BEGINIFCLKEVENTANDCLK=1THENIFRST1=1THENS_CNT=000;

ELSES_CNT=S_CNT+1;

S_SEL=S_CNT;

S_BUF3=1111;

S_BUF6=1111;

PROCESS（S_CNT,S_BUF1,S_BUF2,S_BUF3,S_BUF4,S_BUF5,S_BUF6,S_BUF7,S_BUF8）BEGINCASES_CNTISWHEN000=S_TEMPS_TEMPS_TEMPS_TEMPS_TEMPS_TEMPS_TEMPS_TEMPNULL;

ENDCASE;

PROCESS（SEG_TEMP）BEGINCASESEG_TEMPISWHEN0000=SEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DA=x00;

U1:

CNT10PORTMAP（CLK=CLK5,RST=RST1,CNT_VAL=S_BUF1,COUT=COUT（0）,CIN=1）;

U2:

CNT6PORTMAP（CLK=CLK5,RST=RST1,CNT_VAL=S_BUF2,COUT=COUT

（1）,CIN=COUT（0）;

U3:

CNT10PORTMAP（CLK=CLK5,RST=RST1,CNT_VAL=S_BUF4,COUT=COUT

（2）,CIN=COUT

（1）;

U4:

CNT6PORTMAP（CLK=CLK5,RST=RST1,CNT_VAL=S_BUF5,COUT=COUT（3）,CIN=COUT

（2）;

U5:

CNT4PORTMAP（CLK=CLK5,RST=RST1,CNT_VAL=S_BUF7,COUT=COUT（4）,CIN=COUT（3）;

U6:

CNT2PORTMAP（CLK=CLK5,RST=RST1,CNT_VAL=S_BUF8,COUT=COUT（5）,CIN=COUT（4）;

ENDADO;

LIBRARYIEEE;

ENTITYCNT10ISPORT（CLK:

ENDCNT10;

ARCHITECTUREBEHAVEOFCNT10ISSIGNALCNT_T:

BEGINPROCESS（CLK）BEGINIFRST=1THENCNT_T=0000;

ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T/=9THENCNT_T=CNT_T+1;

ELSECNT_T=0000;

ELSECNT_T=CNT_T;

COUT=1WHENCNT_T=9ANDCIN=1ELSE0;

CNT_VAL=CNT_T;

ENDBEHAVE;

ENTITYcnt6ISPORT（CLK:

ENDCNT6;

ARCHITECTUREADO2OFCNT6ISSIGNALCNT_T:

SIGNALCOUTD:

BEGINPROCESS（CLK,RST）BEGINIFRST=1THENCNT_T=0000;

ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T5THENCNT_T=CNT_T+1;

ELSECNT_T=x0;

COUT=1WHENCNT_T=5ANDCIN=1ELSE0;

ENDADO2;

ENTITYCNT2ISPORT（CLK:

ENDCNT2;

ARCHITECTUREADO3OFCNT2ISSIGNALCNT_T:

ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T1THENCNT_T=CNT_T+1;

COUT=1WHENCNT_T=1ANDCIN=1ELSE0;

ENDADO3;

ENTITYCNT4ISPORT（CLK:

ENDCNT4;

ARCHITECTUREBEHAVEOFCNT4ISSIGNALCNT_T:

ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T3THENCNT_T=CNT_T+1;

COUT=1WHENCNT_T=3ANDCIN=1ELSE0;