單片機原理實驗指導書(張自友083)(完整版)
【正文】 種第三個數(shù)碼管 MOV DPTR,LEDSEG MOV A,LED2 MOVC A,A+DPTR ORL A,80H 。小數(shù)部分放大10倍 MOV LED1,B MOV B,10 MUL AB MOV LED0,BFX0_RET:MOV DPTR,C0809 MOVX DPTR,A 。0832 口地址 ORG 0000H AJMP START ORG 0003H AJMP FX0 ORG 0030HSTART: MOV SP,60H MOV R1,1 SETB EX0 SETB IT0 SETB EALOOP: ACALL SCAN SJMP LOOP；方波生成FANGBO: MOV A,0FFH MOV DPTR,D_APORT MOVX DPTR,A ACALL DELAY MOV A,00H MOVX DPTR,A ACALL DELAY ACALL SCAN SJMP FANGBO；鋸齒波生成JUCHI: MOV A,00H MOV DPTR,D_APORTJ_L: MOVX DPTR,A INC A JNZ J_L ACALL SCAN SJMP JUCHI；正弦波生成SINE: MOV R0,0S_L: MOV DPTR,TABLE MOV A,R0 MOVC A,A+DPTR MOV DPTR,D_APORT MOVX DPTR,A INC R0 CJNE R0,65,S_L ACALL SCAN SJMP SINE；中斷服務子程序FX0: INC R1 RETI；按鍵掃描SCAN: CJNE R1,0,N1 AJMP FANGBON1: CJNE R1,1,N2 AJMP SINEN2: CJNE R1,2,N3 AJMP JUCHIN3: MOV R1,0 RET；延時 DELAY: MOV R7,80 DJNZ R7,$ RET ；正弦波數(shù)據(jù)表TABLE: DB 141,153,165,177,188,199,209,218,227,234,241,246,250,254 DB 255,256,255,254,251,246,241,235,227,219,209,199,188,177 DB 165,153,141,128,116,103,91,79,68,57,47,38,29,22,15,10,6 DB 3,1,0,1,2,5,10,15,21,29,37,47,57,67,79,90,103,115,128 ； END3，鍵盤掃描與數(shù)碼管顯示實驗。8255 PA口地址P8255B EQU 0F229H 。PB口輸入,PA,PC口輸出 MOVX DPTR,A SETB EX0 SETB IT0 。查段選碼 MOV DPTR,P8255A MOVX DPTR,A 。無鍵返回 KEY_NEXT: ACALL D10MS 。掃描第二行 MOV DPTR,P8255C MOVX DPTR,A MOV DPTR,P8255B MOVX A,DPTR CJNE A,0FFH,KEY_L1。將鍵值保存到顯存區(qū)KEYWAIT: MOV DPTR,P8255B 。PC3~5LEDSA~LEDSC,PC2LEDSELECT(通過短路套已接好)。秒十位LLL DATA 52H 。輔助計數(shù)變量2。8255初始化 MOV A,80H 。存放數(shù)碼管位選碼(00H,08,10H,+8) MOV R0,50H 。延時,增加顯示亮度 。秒 INC LML MOV A,LML CJNE A,10,S0 MOV LML,0 INC LMH MOV A,LMH CJNE A,6,S0 MOV LMH,0 。,全熄滅。PA送高電平 ACALL SCAN ACALL DELAY 。低電平持續(xù)一定時間(255A控制) AJMP LOOP。通過K0~K7調(diào)節(jié)256種擋位的轉(zhuǎn)速。判斷是否到24時,LHH*10+LHL CJNE A,24,S0 MOV LHH,0 MOV LHL,0 ?；厮蚏5 INC R0 。數(shù)碼管位選碼 MOVX DPTR,A 。定時器初始化,定時
醫(yī)療健康相關(guān)推薦
鄂ICP備17016276號-1