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±í3.1 Òý½ÅËø¶¨¶ÔÓ¦±í clk 183 ÐøÉϱí

led7s[0] led7s[1] led7s[2] led7s[3] led7s[4] led7s[5] led7s[6] 175 176 177 179 35

bt[3] 170 bt[2] 172 bt[1] 173 bt[0] 174 180 186 187 µç×ÓÉè¼Æ×Ô¶¯»¯ÊµÑéÖ¸µ¼

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module clock(clk,seg7,scan); input clk; output[6:0]seg7; output[3:0]scan; reg[15:0]cnt1,cnt2; reg[1:0]cnt3; reg clk1hz,clk1khz; reg[5:0]sec,min; reg[15:0]timed; reg[3:0]data; reg[3:0]scan; reg[6:0]seg7;

/********************** 1kHz,ÓÃÓÚɨÃè

**********************/ always@(posedge clk) begin

if(cnt1==19999) begin

cnt1=0;clk1khz=~clk1khz;end else

37

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cnt1=cnt1+1'b1; end

/********************** 1Hz,ÓÃÓÚ¼ÆÊ±

**********************/ always@(posedge clk1khz) begin if(cnt2==499) begin

cnt2=0;clk1hz=~clk1hz;end else

cnt2=cnt2+1'b1; end

/********************** ʱÖÓ¼ÆÊ±

**********************/ always@(posedge clk1hz) begin

timed[3:0]<=timed[3:0]+1'b1; if(timed[3:0]==4'h9) begin

timed[7:4]<=timed[7:4]+1'b1;timed[3:0]<=0; if(timed[7:4]==4'h5) begin

timed[11:8]<=timed[11:8]+1'b1;timed[7:4]<=0; if(timed[11:8]==4'h9) begin

timed[15:12]<=timed[15:12]+1'b1;timed[11:8]<=0; if(timed[15:12]==4'h5) begin

timed[15:12]<=0; end end end end end

/******************************** *ÊýÂë¹Ü¶¯Ì¬É¨Ãè¼ÆÊý

********************************/ always@(posedge clk1khz) begin if(cnt3==3)

38

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