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1、连理工大学实验报告实验八MCS-51单片机综合设计——AD转换的十进制显示实验一、实验目的学习掌握ZLG7290和TCL549组建数据采集系统的方法。二、实验内容使用AD转换芯片TCL549CP对模拟电压进行数字转换，将转换的结果处理为3位的十进制数（000--255）并通过ZLG7290B进行显示。SDABITP1.0SCLBITP1.1WSLAEQU070HRSLAEQU071HDATBITP1.0CLKBITP1.1CSBITP1.4CUNTEQU20HSHIFTEQU05HADDREQU20HDISDAEQU40HDISCUNTEQU08HORG8000HLJMP810
2、0HORG8100HSTART:MOVSP,#60HCLRP1.7LCALLDELAYSETBP1.7MOVDISDA+7,#0EEHMOVDISDA+6,#7AHMOVDISDA+5,#1AHMOVDISDA+4,#00HMOVDISDA+3,#12HLOOP:LCALLTLC549LCALLADJUSTLCALLBCD_CONTMOVR7,#DISCUNTMOVR0,#DISDAMOVR2,#10HMOVR3,#WSLALCALLWRNBYTLCALLDELAY8SJMPLOOPTLC549:PUSH00HPUSH07HMOVR7,#CUNTMOVR0,#ADDRLOOP2
3、:LCALLTLC549_ADCMOV@R0,AINCR0DJNZR7,LOOP2POP07HPOP00HRETADJUST:PUSH00HPUSH02HPUSH03HPUSH07HMOVR7,#CUNTMOVR0,#ADDRCLRAMOVR2,ALOOP3:CLRCADDCA,@R0JNCLOOP4INCR2LOOP4:INCR0DJNZR7,LOOP3MOVR3,AMOVA,R2MOVR7,#SHIFTLOOP5:CLRCMOVA,R2RRCAMOVR2,AMOVA,R3RRCAMOVR3,ADJNZR7,LOOP5POP07HPOP03HPOP02HPOP00HRETTL
4、C549_ADC:PUSH07HCLRASETBP1.0SETBP1.1SETBP1.78CLRCLKMOVR7,#08HCLRCSLOOP1:SETBCLKNOPNOPNOPNOPMOVC,DATRLCACLRCLKNOPNOPDJNZR7,LOOP1SETBCSSETBCLKPOP07HRETBCD_CONT:PUSH07HPUSH06HPUSH05HPUSH02HMOVB,#64HDIVABMOVR7,AMOVR2,BMOVA,R2MOVB,#0AHDIVABMOVR6,AMOVR5,BMOVA,R7LCALLCFMOVDISDA+2,R3MOVA,R6LCALLCFMO
5、VDISDA+1,R3MOVA,R5LCALLCFMOVDISDA+0,R3POP02HPOP05HPOP06HPOP07HRETCF:PUSH02H8PUSHDPHPUSHDPLMOVDPTR,#LEDSEGMOVR2,AANLA,#0FHMOVCA,@A+DPTRMOVR3,AMOVA,R2SWAPAANLA,#0FHMOVCA,@A+DPTRMOVR4,APOPDPLPOPDPHPOP02HRETDELAY:PUSH00HPUSH01HMOVR0,#00HDELAY1:MOVR1,#00HDJNZR1,$DJNZR0,DELAY1POP01HPOP00HRETLEDSEG
6、:DB0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E4HDB0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EHWRNBYT:PUSHPSWPUSHACCWRADD:MOVA,R3LCALLSTALCALLWRBYTLCALLCACKJBF0,WRADDMOVA,R2LCALLWRBYTLCALLCACKJBF0,WRADDWRDA:MOVA,@R0LCALLWRBYTLCALLCACKJBF0,WRADDINCR0DJNZR7,WRDALCALLSTOPPOPACC8POPPSWRET;启动信号STA:SETBSDASETBSCLNOP
7、NOPNOPNOPNOPCLRSDANOPNOPNOPNOPNOPCLRSCLRET;停止信号STOP:CLRSDASETBSCLNOPNOPNOPNOPNOPSETBSDANOPNOPNOPNOPNOPCLRSCLCLRSDARET;答应检测CACK:SETBSDASETBSCLCLRF0MOVC,SDAJNCCENDSETBF0CEND:CLRSCLRET;发送一个字节WRBYT:PUSH06HMOVR6,#08HWLP:RLCAMOVSDA,C8SETBSCLNOPNOPNOPNOPN
