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          EEPW首頁 > 模擬技術(shù) > 設(shè)計(jì)應(yīng)用 > 單片機(jī)點(diǎn)陣式LED簡單圖形顯示技術(shù)

          單片機(jī)點(diǎn)陣式LED簡單圖形顯示技術(shù)

          作者: 時(shí)間:2012-08-01 來源:網(wǎng)絡(luò) 收藏

          1.實(shí)驗(yàn)任務(wù)

          本文引用地址:http://www.ex-cimer.com/article/186014.htm

          在8X8顯示“★”、“●”和心形圖,通過按鍵來選擇要顯示的圖形。

          2.電路原理圖

          點(diǎn)陣式LED簡單圖形顯示技術(shù)Character displayer

          3.硬件系統(tǒng)連線

          (1).把“系統(tǒng)”區(qū)域中的P1端口用8芯排芯連接到“點(diǎn)陣模塊”區(qū)域中的“DR1-DR8”端口上;

          (2).把“系統(tǒng)”區(qū)域中的P3端口用8芯排芯連接到“點(diǎn)陣模塊”區(qū)域中的“DC1-DC8”端口上;

          (3).把“系統(tǒng)”區(qū)域中的P2.0/A8端子用導(dǎo)線連接到“獨(dú)立式鍵盤”區(qū)域中的SP1端子上;

          4.程序設(shè)計(jì)內(nèi)容

          (1).“★”在8X8點(diǎn)陣上顯示圖如下圖所示

          1.jpg

          12H,14H,3CH,48H,3CH,14H,12H,00H

          (2).“●”在8X8點(diǎn)陣上顯示圖如下圖所示

          2.jpg

          00H,00H,38H,44H,44H,44H,38H,00H

          (3).心形圖在8X8LED點(diǎn)陣上顯示圖如下圖所示

          3.jpg

          30H,48H,44H,22H,44H,48H,30H,00H

          5.匯編源程序

          CNTAEQU 30H

          COUNTEQU 31H

          ORG 00H

          LJMP START

          ORG 0BH

          LJMP T0X

          ORG 30H

          START:MOV CNTA,#00H

          MOV COUNT,#00H

          MOV TMOD,#01H

          MOV TH0,#(65536-4000) / 256

          MOV TL0,#(65536-4000) MOD 256

          SETB TR0

          SETB ET0

          SETB EA

          WT:JB P2.0,WT

          MOV R6,#5

          MOV R7,#248

          D1:DJNZ R7,$

          DJNZ R6,D1

          JB P2.0,WT

          INC COUNT

          MOV A,COUNT

          CJNE A,#03H,NEXT

          MOV COUNT,#00H

          NEXT:JNB P2.0,$

          SJMP WT

          T0X: NOP

          MOV TH0,#(65536-4000) / 256

          MOV TL0,#(65536-4000) MOD 256

          MOV DPTR,#TAB

          MOV A,CNTA

          MOVC A,@A+DPTR

          MOV P3,A

          MOV DPTR,#GRAPH

          MOV A,COUNT

          MOV B,#8

          MUL AB

          ADD A,CNTA

          MOVC A,@A+DPTR

          MOV P1,A

          INC CNTA

          MOV A,CNTA

          CJNE A,#8,NEX

          MOV CNTA,#00H

          NEX:RETI

          TAB:DB 0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FH

          GRAPH:DB 12H,14H,3CH,48H,3CH,14H,12H,00H

          DB 00H,00H,38H,44H,44H,44H,38H,00H

          DB 30H,48H,44H,22H,44H,48H,30H,00H

          END

          6.C語言源程序

          #include

          unsigned char code tab[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

          unsigned char code graph[3][8]={{0x12,0x14,0x3c,0x48,0x3c,0x14,0x12,0x00},

          {0x00,0x00,0x38,0x44,0x44,0x44,0x38,0x00},

          {0x30,0x48,0x44,0x22,0x44,0x48,0x30,0x00}

          };

          unsigned char count;

          unsigned char cnta;

          void main(void)

          {

          unsigned char i,j;

          TMOD=0x01;

          TH0=(65536-4000)/256;

          TL0=(65536-4000)%6;

          TR0=1;

          ET0=1;

          EA=1;

          while(1)

          {

          if(P2_0==0)

          {

          for(i=5;i>0;i--)

          for(j=248;j>0;j--);

          if(P2_0==0)

          {

          count++;

          if(count==3)

          {

          count=0;

          }

          while(P2_0==0);

          }

          }

          }

          }

          void t0(void) interrupt 1 using 0

          {

          TH0=(65536-4000)/256;

          TL0=(65536-4000)%6;

          P3=tab[cnta];

          P1=graph[count][cnta];

          cnta++;

          if(cnta==8)

          {

          cnta=0;

          }

          }

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