匯編語(yǔ)言：在兩個(gè)數(shù)碼管上實(shí)現(xiàn)00-99的循環(huán)顯示

1、;此程序?yàn)樵趦蓚€(gè)數(shù)碼管上實(shí)現(xiàn)00-99的循環(huán)顯示;設(shè)置ramDATA_IN DATA 20H;接收數(shù)據(jù)緩沖寄存器DATA_OUT DATA 21H;發(fā)送數(shù)據(jù)緩沖寄存器BIT_COUNT DATA 22H;數(shù)據(jù)位數(shù)寄存器/HOUR DATA 23H/MINITE DATA 24H/SECOND DATA 25H/MSECOND DATA 26HORG0000HLJMPINITORG000BHLJMPTIME0;定時(shí)器0中斷入口 ORG 0013HLJMP KBHIT;初始化ORG0030HINIT:MOVDPTR,#4000H;HD7279A的地址MOVA,#B;HD7279A初始化CS、CLK

2、、DATAMOVXDPTR,ALCALLDELAY25MS;延時(shí)后進(jìn)入工作狀態(tài)MOVDATA_OUT,#B;HD7279A復(fù)位指令LCALLSEND;發(fā)送指令MOVA,#B;設(shè)回CS為高電平MOVX DPTR,A/MOVR4,#20;定時(shí)器一個(gè)周期內(nèi)的中斷數(shù)MOV R2,#0MOV R3,#0MOV R4,#0MOV R5,#0/MOVMSECOND,#0/MOVSECOND,#0/MOVMINITE,#0/MOVHOUR,#0 ;數(shù)字計(jì)數(shù)器MOVR6,#0;個(gè)位寄存器MOVR7,#0;十位寄存器MOVTMOD,#1;設(shè)置定時(shí)器0工作模式為方式1/MOVTH0,#3CH;設(shè)置定時(shí)器定時(shí)值/MO

3、VTL0,#0B0HMOVTH0,#0FCH;設(shè)置定時(shí)器定時(shí)值MOVTL0,#18HSETBEA;開總中斷SETBET0;開定時(shí)器0中斷SETB EX1 SETBTR0 ;開始計(jì)時(shí);主程序MAIN:MOVA,R2;把數(shù)字轉(zhuǎn)換為2個(gè)BCD碼MOVB,#10DIVABMOVR6,B;個(gè)位放在R6MOVR7,A;十位放在R7MOVDATA_OUT,#B;下載數(shù)據(jù)且按方式1譯碼,找到了第1個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R1;指令的數(shù)據(jù)部分,顯示個(gè)位LCALLSENDMOVA,#BMOVXDPTR,AMOVDATA_OUT,#B;下載

4、數(shù)據(jù)且按方式1譯碼,找到了第2個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R2;指令的數(shù)據(jù)部分,顯示個(gè)位LCALLSENDMOVA,#BMOVXDPTR,AMOVDATA_OUT,#B;下載數(shù)據(jù)且按方式1譯碼,找到了第3個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R3;指令的數(shù)據(jù)部分,顯示個(gè)位LCALLSENDMOVA,#BMOVXDPTR,A/LCALLDELAY1MS;顯示延時(shí) MOVA,R4;把數(shù)字轉(zhuǎn)換為2個(gè)BCD碼MOVB,#10DIVABMOVR6,B;個(gè)位放在R6MOVR

5、7,A;十位放在R7MOVDATA_OUT,#B;下載數(shù)據(jù)且按方式1譯碼,找到了第4個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R6;指令的數(shù)據(jù)部分,顯示個(gè)位LCALLSENDMOVA,#BMOVXDPTR,A/LCALLDELAY1MS;顯示延時(shí)MOVDATA_OUT,#B;下載數(shù)據(jù)且按方式1譯碼,找到了第5個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R7;指令的數(shù)據(jù)部分,顯示十位LCALLSENDMOVA,#BMOVXDPTR,A/LCALLDELAY1MS;顯示延時(shí) MOVA,

6、R5;把數(shù)字轉(zhuǎn)換為2個(gè)BCD碼MOVB,#10DIVABMOVR6,B;個(gè)位放在R6MOVR7,A;十位放在R7MOVDATA_OUT,#B;下載數(shù)據(jù)且按方式1譯碼,找到了第6個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R6;指令的數(shù)據(jù)部分,顯示個(gè)位LCALLSENDMOVA,#BMOVXDPTR,A/LCALLDELAY1MS;顯示延時(shí)MOVDATA_OUT,#B;下載數(shù)據(jù)且按方式1譯碼,找到了第7個(gè)數(shù)碼管LCALLSENDLCALLDELAY25;T4,指令與數(shù)據(jù)時(shí)間間隔MOVDATA_OUT,R7;指令的數(shù)據(jù)部分,顯示十位LCALL

7、SENDMOVA,#BMOVXDPTR,A/LCALLDELAY1MS;顯示延時(shí)LJMPMAIN;下一循環(huán)SJMP$;發(fā)送子程序SEND:CLRET0;加鎖MOVBIT_COUNT,#8;無論指令還是數(shù)據(jù),一次只發(fā)送8位MOVA,#B;設(shè)CS為低電平MOVXDPTR,ALCALLDELAY50;T1,從CS下降沿至CLK脈沖時(shí)間;發(fā)送循環(huán),HD7279A采用串行方式與微處理器通訊,一次發(fā)送一位SENDLOOP:MOV A,DATA_OUT;取出發(fā)送的指令或數(shù)據(jù)MOV C,ACC.7;串行發(fā)送從高位到低位發(fā)送,故先取最高位MOV A,#B;輸出到DAT位MOV ACC.5,CMOVX DPTR,

8、ASETB C ;設(shè)CLK為高電平MOV ACC.6,CMOVX DPTR,ALCALL DELAY8;T2,傳送指令時(shí)CLK脈沖寬度CLR C;設(shè)CLK為低電平MOV ACC.6,CMOVX DPTR,ALCALL DELAY8;T3,字節(jié)傳送中CLK脈沖時(shí)間MOV A,DATA_OUT;移位待發(fā)送的指令或數(shù)據(jù),為下一位的發(fā)送作準(zhǔn)備RL AMOV DATA_OUT,ADJNZ BIT_COUNT,SENDLOOP;發(fā)送不到8位,繼續(xù)循環(huán)MOVA,#B;發(fā)送完畢,恢復(fù)DATMOVX DPTR,ASETBET0;釋放鎖RET;接收子程序(本程序中用不到,但在添加按鍵操作的時(shí)候用于讀取鍵值)REC

9、EIVE:CLRET0;加鎖MOVBIT_COUNT,#8;接收8位數(shù)據(jù)MOVDATA_IN,#0;清空接收數(shù)據(jù)緩沖寄存器MOVA,#B;設(shè)CS為低電平,同時(shí)保證DAT為高電平(輸入狀態(tài))MOVXDPTR,ALCALLDELAY25;T5,讀鍵盤指令中指令與數(shù)據(jù)時(shí)間間隔;接收循環(huán),HD7279A采用串行方式與微處理器通訊,一次接收一位RECEIVELOOP:SETBACC.6;設(shè)CS為高電平MOVXDPTR,ALCALLDELAY8;T6,輸出鍵盤數(shù)據(jù)建立時(shí)間MOV A,DATA_IN;接收數(shù)據(jù)緩沖寄存器向左移位,準(zhǔn)備接收一位數(shù)據(jù),數(shù)據(jù)的高位會(huì)先發(fā)送RL AMOV DATA_IN,AMOVXA

10、,DPTR;讀取數(shù)據(jù)MOVC,ACC.5;取出數(shù)據(jù)位DATMOVA,DATA_INMOVACC.0,CMOVDATA_IN,A;數(shù)據(jù)放進(jìn)接收數(shù)據(jù)緩沖寄存器MOVA,#B;設(shè)CS為低電平,同時(shí)保證DAT為高電平(輸入狀態(tài))MOVXDPTR,ALCALLDELAY8;T7,讀鍵盤數(shù)據(jù)是CLK脈沖寬DJNZBIT_COUNT,RECEIVELOOP;接收不到8位,繼續(xù)循環(huán)MOVA,#B;接收完畢,恢復(fù)DATMOVX DPTR,ASETBET0;釋放鎖RET;定時(shí)器0中斷程序TIME0:/ DJNZR4,NEXT;定時(shí)器一個(gè)周期內(nèi)中斷數(shù)不夠就繼續(xù)計(jì)時(shí)INCR2;數(shù)字加1/MOVR4,#20;重置定時(shí)器

11、一個(gè)周期內(nèi)中斷數(shù)CJNER2,#100,NEXT;數(shù)字不夠100繼續(xù)加1MOVR2,#0;數(shù)字到達(dá)100就清零INC R3CJNER3,#10,NEXTMOVR3,#0INC R4CJNER4,#60,NEXTMOVR4,#0INC R5CJNER5,#60,NEXTMOVR5,#0NEXT:MOVTH0,#0FCH;定時(shí)器方式1中斷后需要重新設(shè)置定時(shí)器定時(shí)值MOVTL0,#18HRETIKBHIT: PUSHPSWPUSH ACC PUSH DPHPUSH DPL PUSH DATA_OUTPUSH BIT_COUNTMOV A,R0PUSH ACCMOV A,R1PUSH ACC MOV

12、DATA_OUT,#B LCALL SENDLCALL DELAY25LCALL RECEIVEMOV A,DATA_INJZ STARTDEC ADEC AJZ STOPDEC AJZ CLEARSJMP OUTSTART: SETB TR0 SJMP OUTSTOP: CLR TR0 SJMP OUTCLEAR: MOVR2,#0MOVR3,#0MOVR4,#0MOVR5,#0OUT: POP ACC MOV R1,APOP ACCMOV R0,APOP BIT_COUNT POP DATA_OUTPOP DPLPOP DPHPOP ACCPOPPSWRETI ;延時(shí)25ms子程序DELAY25MS:MOVR0,#49D11:MOVR1,#253NOPD12:DJNZR1,D12DJNZR0,D11RET;延時(shí)50s子程序DELAY5