51單片機擴展24C02程序和電路

1、SDASCLTRIGARP1RESP.ACK8傘AQINPNABCDEFGDF12jz-r-1iR110k.iTEXT：87654321333333323-4-5-fi-7-s_22222210kA1SCKSDAiwCTAL1PO.O/.CLiPU.1/C1PD.2MD2XT凸L2PD.3/PCGPLi.4/.4PU.SZCpo.ti.eRSTP叮聞7P2.0/叫P2.2/A1DPSENP2.3/A11ALEP2.4/A12EAP2.5/A13P2.6/A14P2.7/A15P1.0P3.D/F：nP1.1P3.1D(DP1.2P3.2/irIDP1.3P3.3/irmP1.4PS.TLiP1

2、.5P3.5/T1P1.6P3.6/WRP1.7P3.7/RDATyyC51SRCFILE=2I4開機統(tǒng)計ASM#include#include#defineuintunsignedint#defineucharunsignedcharsbitsda=P11;sbitscl二P0;uchartemp=0;uchardata_h,data_l;_nop_();ucharstate;constuchartab=0 xc0,0 xf9,0 xa4,0 xb0,0 x99,0 x92,0 x82,0 xf8,0 x80,0 x90;voiddelayic(uinti)ucharj;while(i-)f

3、or(j=0;j120;j+);voiddelaym(uchart)uchari;for(i=0;it;i+);voidStart_I2c()sda=1;_nop_();scl=1;_nop_();_nop_();_nop_();_nop_();sda=0;_nop_();_nop_();_nop_();_nop_();_nop_();scl=0;_nop_();_nop_();voidStop_I2c()sda=0;_nop_();scl=1;_nop_();_nop_();_nop_();_nop_();sda=1;_nop_();_nop_();_nop_();_nop_();voidc

4、ack(void)sda=0;_nop_();_nop_();_nop_();scl=1;_nop_();_nop_();_nop_();_nop_();_nop_();scl=0;_nop_();voidmnack(void)sda=1;_nop_();_nop_();_nop_();scl=1;_nop_();_nop_();_nop_();_nop_();_nop_();scl=0;sda=0;_nop_();_nop_();voidwrbyt(uchardate)uchari,j;j=0 x80;for(i=0;i1;ucharrdbyt(void)wrbyt(1);uchara,c;

5、scl=0;delaym(1);sda=1;delaym(1);for(c=0;c8;c+)scl=1;delaym(1);a=(a1)|sda;scl=0;delaym(1);returna;voidread_data()Start_I2c();wrbyt(0 xa0);cack();cack();Start_I2c();wrbyt(0 xa1);cack();temp=rdbyt();mnack();Stop_I2c();delayic(50);voidwrite_data()if(temp=5)P2=0 x00;delayic(400);data_l=num%10;data_h=num/

6、10;P2=0 x01;P0=tabdata_h;delayic(150);P2=0 x02;P0=tabdata_l;delayic(150);voidmain()read_data();write_data();while(1)dispaly(temp);匯編程序：;24c02的開機計數(shù)器，系統(tǒng)復(fù)位一次數(shù)碼管加1SDA24EQUP1.1SCLK24EQUP1.0ORG0000HAJMPMAINORG0030HMAIN:CLRP3.7;打開寫保護MOVDPTR,#TABMOVA,#00H;讀地址LCALLRD24CJNEA,#10,TTTT:JNCTT1AJMPTT2TT1:MOVA,#00

7、TT2:MOV30H,AMOVCA,A+DPTRSETBP2.0;開數(shù)碼管MOVP0,A;送顯示MOVA,30HINCAMOVB,AMOVA,#00HLCALLWT24AJMP$TAB:DB28H,7EH,0A2H,62H,74H,61H,21H,7AH,20H,60HRD24:PUSHACC;讀24C02子程序。SETBSDA24CLRSCLK24CALLSTART24MOVA,#0A0HCALLSHIFT8CALLACKPOPACCCALLSHIFT8CALLACKCALLSTART24MOVA,#0A1HCALLSHIFT8CALLACKSETBSDA24MOVR7,#8CLRASETB

8、SDA24RD000:RLASETBSCLK24MOVC,SDA24MOVACC.0,CCLRSCLK24DJNZR7,RD000RET;寫入24C02程序：WT24:PUSHACCSETBSDA24CLRSCLK24CALLSTART24MOVA,#0A0HCALLSHIFT8CALLACKPOPACCCALLSHIFT8CALLACKMOVA,BCALLSHIFT8CALLACKCALLSTOPCALLDELAY2RET;開始條件START24:CLRSDA24SETBSDA24SETBSCLK24CLRSDA24CLRSCLK24RET;停止條件STOP:CLRSDA24SETBSCLK24SETBSDA24RET;應(yīng)