實驗四兩個單片機(jī)之間雙向通信實驗

1、-PAGE . z.實驗四 兩個單片機(jī)之間雙向通信實驗一、實驗?zāi)康?1.了解MCS-51單片機(jī)串行口UART的構(gòu)造、工作方式。 2.了解串行口通信的原理和數(shù)據(jù)交換過程。 3.掌握單片機(jī)之間進(jìn)展串行口通信的編程方法。二、實驗內(nèi)容 將甲乙兩臺單片機(jī)串行口連接，即甲機(jī)的T*D與乙機(jī)的R*D相連；甲機(jī)的R*D與乙機(jī)的T*D相連；并實現(xiàn)雙機(jī)共地。整個系統(tǒng)實現(xiàn)雙向通信。具體是:1.甲機(jī)的K1按鍵可通過串行口分別控制乙機(jī)的LED1點亮；LED2點亮；LED1和LED2全亮或者全滅。2.乙機(jī)的K2按鍵可通過串行口向甲機(jī)發(fā)送數(shù)字，甲機(jī)將接收到的數(shù)字顯示在其P0端口的LED數(shù)碼管顯示器上。三、實驗程序甲機(jī)程序：O

2、RG0000HAJMPMAINORG0003HAJMPSENDORG0023HAJMPREADYMAIN:MOVSCON,#90HMOVPCON,#80HSETBEASETBESSETBIT0SETBE*0MOVSP,#40HMOVR0,#0MOVDPTR,#TABHERE:SJMPHERESEND:CJNER0,#04H,LP1SHOW: MOV A,R0 MOVCA,A+DPTRMOVC,PMOVTB8,CMOVSBUF,ACLRTI INCR0RETIREADY:CTI,RETURNRECEIVE:CLRRIMOVA,SBUFMOVP0,ARETURN:RETILP1:JCSHOWCLR

3、CMOVA,R0SUBBA,#04HMOVR0,AAJMPSHOWTAB:DB00H,01H,02H,03HEND乙機(jī)程序：ORG0000HAJMPMAINORG0003HAJMPSENDORG0023HAJMPREADYMAIN:MOVSCON,#90HMOVPCON,#80HSETBEASETBESSETBIT0SETBE*0MOVSP,#40HMOVR0,#0MOVDPTR,#TABHERE:SJMPHERESEND:CJNER0,#09H,LP1SHOW: MOV A,R0 MOVCA,A+DPTRMOVC,PMOVTB8,CMOVSBUF,ACLRTI INCR0RETIREADY:CTI,RETURNRECEIVE:CLRRIMOVA,SBUFMOVP1,ARETURN:RETILP1:JCSHOWCLRCMOVA,R0SUBBA,#0AHMOVR0,AAJMPSHOWTAB:DB0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0FFHEND四、實驗原理圖五、實驗仿真及結(jié)果六、實驗總結(jié)通過本次實驗，掌握了單片機(jī)之間進(jìn)展串行口通信的編程方法，