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<td width="66%"><STRONG><font color=blue>[推薦]</font>CPLD與51單片機(jī)總線接口</STRONG></td>
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<td class=main_ArticleTitle style="WORD-BREAK: break-all" colSpan=2 height=50>CPLD與51單片機(jī)總線接口</td>
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<td class=Article_tdbgall colSpan=2>作者:cpchen79 文章來(lái)源:佚名 點(diǎn)擊數(shù):165 更新時(shí)間:2006-7-8</td>
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前段時(shí)間做的CPLD與51單片機(jī)總線接口
<P>`timescale 1ns/1ns<BR>module IO_KZ(Data,P27,WR,RD,ALE,CLR,OUTKEY,OUT30,CS,CS1,LEDCS,OC);<BR> inout [7:0]Data;<BR> input WR;<BR> input P27;<BR> input RD;<BR> input ALE;<BR> input CLR;<BR> input OC;<BR> input [4:0]OUTKEY;<BR> output [59:0]OUT30;<BR> output [1:0]CS;<BR> output CS1;<BR> output [14:0]LEDCS;<BR> reg [14:0]LEDCS;<BR> reg [59:0]OUT30;<BR> reg [1:0]CS;<BR> wire CS1;<BR> //wire [7:0]Data;<BR> reg [8:0]IOADD;<BR> reg [15:0]DataBF;<BR> reg wr_en;<BR> reg [7:0]OUTKEYBF;<BR> //wire [7:0]OUTKEYBF1;<BR>assign CS1=((IOADD==338)&&(OC==0))?1'b0:1'b1;//8052<BR>assign Data=((IOADD==277)&&(OC==0)&&(RD==0))?OUTKEYBF:8'bzzzzzzz;//8015<BR>always @(OUTKEY) <BR> begin<BR> if(OUTKEY[0]==0)<BR> OUTKEYBF<=1; <BR> else if(OUTKEY[1]==0)<BR> OUTKEYBF<=2;<BR> else if(OUTKEY[2]==0)<BR> OUTKEYBF<=3;<BR> else if(OUTKEY[3]==0)<BR> OUTKEYBF<=4;<BR> else if(OUTKEY[4]==0)<BR> OUTKEYBF<=5;<BR> else<BR> OUTKEYBF<=0;<BR> end<BR>always @(negedge ALE)<BR> begin<BR> IOADD<={P27,Data};//ALE下降延讀地址<BR> end<BR>always @(IOADD or WR) //WR下降延寫數(shù)據(jù)<BR> begin<BR> if((IOADD>256)&&(IOADD<337)&&(IOADD!=277))wr_en<=WR;<BR> else<BR> begin<BR> wr_en<=1;<BR> end <BR> end <BR>always @(negedge wr_en or posedge OC or posedge WR) //WR下降延寫數(shù)據(jù)<BR> begin <BR> if(OC)<BR> begin <BR> CS=2'b00; <BR> LEDCS=15'b00000_0000_0000_00;<BR> end<BR> else if(WR)<BR> begin <BR> CS=2'b00; <BR> end <BR> else <BR> begin<BR> case(IOADD) <BR> 261: begin CS=2'b01; end//8005 <BR> 262: begin CS=2'b10;LEDCS=15'b00000_0000_0000_01;end//8006<BR> 263: begin CS=2'b10;LEDCS=15'b00000_0000_0000_10;end//8007<BR> 264: begin CS=2'b10;LEDCS=15'b00000_0000_0001_00;end//8008<BR> 265: begin CS=2'b10;LEDCS=15'b00000_0000_0010_00;end//8009<BR> 266: begin CS=2'b10;LEDCS=15'b00000_0000_0100_00;end//800A<BR> 267: begin CS=2'b10;LEDCS=15'b00000_0000_1000_00;end//800B<BR> 268: begin CS=2'b10;LEDCS=15'b00000_0001_0000_00;end//800C<BR> 269: begin CS=2'b10;LEDCS=15'b00000_0010_0000_00;end//800D<BR> 270: begin CS=2'b10;LEDCS=15'b00000_0100_0000_00;end//800E<BR> 271: begin CS=2'b10;LEDCS=15'b00000_1000_0000_00;end//800F<BR> 272: begin CS=2'b10;LEDCS=15'b00001_0000_0000_00;end//8010<BR> 273: begin CS=2'b10;LEDCS=15'b00010_0000_0000_00;end//8011<BR> 274: begin CS=2'b10;LEDCS=15'b00100_0000_0000_00;end//8012<BR> 275: begin CS=2'b10;LEDCS=15'b01000_0000_0000_00;end//8013<BR> 276: begin CS=2'b10;LEDCS=15'b10000_0000_0000_00;end//8014<BR> endcase<BR> end <BR> <BR> end <BR> <BR> <BR>always @(negedge wr_en or posedge CLR or posedge OC ) //WR下降延寫數(shù)據(jù)<BR> begin <BR> if(OC)<BR> begin <BR> DataBF=0;<BR> OUT30[59:0]=60'hfffffffffffffff; <BR> end<BR> else if(CLR) <BR> begin<BR> <BR> DataBF=0;<BR> OUT30[59:0]=60'hfffffffffffffff; <BR> end <BR> else <BR> begin <BR> if(Data[0]) <BR> DataBF[1:0]=2'b10;<BR> else<BR> DataBF[1:0]=2'b01; <BR> if(Data[1])<BR> DataBF[3:2]=2'b10;<BR> else<BR> DataBF[3:2]=2'b01; <BR> if(Data[2])<BR> DataBF[5:4]=2'b10;<BR> else<BR> DataBF[5:4]=2'b01; <BR> if(Data[3])<BR> DataBF[7:6]=2'b10;<BR> else<BR> DataBF[7:6]=2'b01; <BR> if(Data[4])<BR> DataBF[9:8]=2'b10;<BR> else<BR> DataBF[9:8]=2'b01; <BR> if(Data[5])<BR> DataBF[11:10]=2'b10;<BR> else<BR> DataBF[11:10]=2'b01; <BR> if(Data[6])<BR> DataBF[13:12]=2'b10;<BR> else<BR> DataBF[13:12]=2'b01; <BR> if(Data[7])<BR> DataBF[15:14]=2'b10;<BR> else<BR> DataBF[15:14]=2'b01; <BR> <BR> case(IOADD)<BR> 257: begin OUT30[15:0] =DataBF;end//8001<BR> 258: begin OUT30[31:16]=DataBF;end//8002 <BR> 259: begin OUT30[47:32]=DataBF;end//8003<BR> 260: begin OUT30[59:48]=DataBF;end//8004<BR> endcase<BR> case(IOADD)<BR> 278: begin OUT30[1:0]=2'b10;end//8016<BR> 279: begin OUT30[1:0]=2'b01;end//8017<BR> 280: begin OUT30[3:2]=2'b10;end//8018<BR> 281: begin OUT30[3:2]=2'b01;end//8019<BR> 282: begin OUT30[5:4]=2'b10;end//801A<BR> 283: begin OUT30[5:4]=2'b01;end//801B<BR> 284: begin OUT30[7:6]=2'b10;end//801C<BR> 285: begin OUT30[7:6]=2'b01;end//801D<BR> 286: begin OUT30[9:8]=2'b10;end//801E<BR> 287: begin OUT30[9:8]=2'b01;end//802F<BR> endcase<BR> case(IOADD)<BR> 288: begin OUT30[11:10]=2'b10;end//8020<BR> 289: begin OUT30[11:10]=2'b01;end//8021<BR> 290: begin OUT30[13:12]=2'b10;end//8022<BR> 291: begin OUT30[13:12]=2'b01;end//8023<BR> 292: begin OUT30[15:14]=2'b10;end//8024<BR> 293: begin OUT30[15:14]=2'b01;end//8025<BR> 294: begin OUT30[17:16]=2'b10;end//8026<BR> 295: begin OUT30[17:16]=2'b01;end//8027<BR> 296: begin OUT30[19:18]=2'b10;end//8028<BR> 297: begin OUT30[19:18]=2'b01;end//8029<BR> endcase<BR> case(IOADD)<BR> 298: begin OUT30[21:20]=2'b10;end//802A<BR> 299: begin OUT30[21:20]=2'b01;end//802B<BR> 300: begin OUT30[23:22]=2'b10;end//802C<BR> 301: begin OUT30[23:22]=2'b01;end//802D<BR> 302: begin OUT30[25:24]=2'b10;end//802E<BR> 303: begin OUT30[25:24]=2'b01;end//802F<BR> 304: begin OUT30[27:26]=2'b10;end//8030<BR> 305: begin OUT30[27:26]=2'b01;end//8031<BR> 306: begin OUT30[29:28]=2'b10;end//8032<BR> 307: begin OUT30[29:28]=2'b01;end//8033<BR> endcase<BR> case(IOADD)<BR> 308: begin OUT30[31:30]=2'b10;end//8034<BR> 309: begin OUT30[31:30]=2'b01;end//8035<BR> 310: begin OUT30[33:32]=2'b10;end//8036<BR> 311: begin OUT30[33:32]=2'b01;end//8037<BR> 312: begin OUT30[35:34]=2'b10;end//8038<BR> 313: begin OUT30[35:34]=2'b01;end//8039<BR> 314: begin OUT30[37:36]=2'b10;end//803A<BR> 315: begin OUT30[37:36]=2'b01;end//803B<BR> 316: begin OUT30[39:38]=2'b10;end//803C<BR> 317: begin OUT30[39:38]=2'b01;end//803D<BR> endcase<BR> case(IOADD)<BR> 318: begin OUT30[41:40]=2'b10;end//803E<BR> 319: begin OUT30[41:40]=2'b01;end//803F<BR> 320: begin OUT30[43:42]=2'b10;end//8040<BR> 321: begin OUT30[43:42]=2'b01;end//8041<BR> 322: begin OUT30[45:44]=2'b10;end//8042<BR> 323: begin OUT30[45:44]=2'b01;end//8043<BR> 324: begin OUT30[47:46]=2'b10;end//8044<BR> 325: begin OUT30[47:46]=2'b01;end//8045<BR> 326: begin OUT30[49:48]=2'b10;end//8046<BR> 327: begin OUT30[49:48]=2'b01;end//8047<BR> endcase<BR> case(IOADD)<BR> 328: begin OUT30[51:50]=2'b10;end//8048<BR> 329: begin OUT30[51:50]=2'b01;end//8049<BR> 330: begin OUT30[53:52]=2'b10;end//804A<BR> 331: begin OUT30[53:52]=2'b01;end//804B<BR> 332: begin OUT30[55:54]=2'b10;end//804C<BR> 333: begin OUT30[55:54]=2'b01;end//804D<BR> 334: begin OUT30[57:56]=2'b10;end//804E<BR> 335: begin OUT30[57:56]=2'b01;end//804F<BR> 336: begin OUT30[59:58]=2'b10;end//8050<BR> 337: begin OUT30[59:58]=2'b01;end//8051<BR> endcase<BR> end<BR> <BR> end <BR>endmodule<BR></P> </td>
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<td class=Article_tdbgall align=right colSpan=2>文章錄入:admin 責(zé)任編輯:admin </td>
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<td width=752><li>上一篇文章: <a class='LinkPrevArticle' href='/Article/ShowArticle.asp?ArticleID=209' title='文章標(biāo)題:CPLD/FPGA中雙向總線的實(shí)現(xiàn)方法
作 者:duoduo
更新時(shí)間:2006-2-21 21:43:54'>CPLD/FPGA中雙向總線的實(shí)現(xiàn)方法</a></li><BR><li>下一篇文章: <a class='LinkNextArticle' href='/Article/ShowArticle.asp?ArticleID=316' title='文章標(biāo)題:CPLD與51單片機(jī)總線接口
作 者:cpchen79
更新時(shí)間:2006-7-8 12:32:52'>CPLD與51單片機(jī)總線接口</a></li></td>
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