STC1052单片机代码.docx

T2CONEQU0C8HT2MODEQU0C9HRCAP2LEQU0CAHRCAP2HEQU0CBHTF2EQUT2CON.7; Overflow Flag of Timer2TR2EQUT2CON.2; Run Timer2 when set to 1, stop when set to 0TL2EQU0CCHTH2EQU0CDHET2EQUIE.5EXTRAMEQU8EHCLCONEQU8FHRMT_DATADATA0AHRMT_BAKDATA0CHRMT_COUNTDATA0EHI2C_ADDRDATA10HI2C_FLAGDATA11HDATA0DATA20HDATA1DATA21HDATA2DATA22HDATA3DATA23HSTACKDATA68HTH1_DATAEQU01HTL1_DATAEQU00HCLKINBITP3.3BYPASSBITP3.4ESTBITP3.5ORG0000HLJMPSTARTORG001BHCLRESTCLRTR1MOVTH1, DATA2MOVTL1, DATA3RETIORG0100HSTART:CLRBYPASS CLREST CLREAMOVSP,#STACKLCALLSFR_INITNOPLCALLWAIT250MSSETBEA STEP1:JNBCLKIN, STEP1; CLKIN = 0? 如果是则跳转，否则顺序执行SETBTR1STEP2:JBCLKIN, STEP2CLRTR1MOVR4, TH1MOVR5, TL1MOVDATA0, R4MOVDATA1, R5MOVR6, #06HLCALLSDIV; 结果在R2 R3中MOVDATA2, R2MOVDATA3, R3 MOVR4, #0FFHMOVR5, #0FFHMOVR0, DATA0MOVR1, DATA1LCALLNSUB; 结果在R4 R5中MOVR0, DATA2MOVR1, DATA3LCALLNADDMOVR0, #00HMOVR1, #10HLCALLNADDMOVDATA2, R4MOVDATA3, R5MOVTH1, DATA2MOVTL1, DATA3STEP3:NOPJNBCLKIN, STEP3NOPSTEP4:NOPJBCLKIN, STEP4NOPNOPSETBEST CLRTF1SETBTR1SETBET1;允许定时器1中断，对KEYSET键按下时间计数NOPSETBBYPASSNOPSTEP5:NOPJNBCLKIN, STEP5NOPSTEP6:NOPJBCLKIN, STEP6NOPLCALLDELAYNOPSETBEST CLRTF1SETBTR1SETBET1;允许定时器1中断，对KEYSET键按下时间计数NOPLJMPSTEP5;SFR_INIT:MOVTMOD,#11H;T0方式1, T1 方式1MOVTCON,#01H;INT0 边沿MOVIE,#00HMOVIP,#00HCLRTF0CLRTF1CLRTR0CLRTR1MOVTH1, #00HMOVTL1, #00HCLRAMOVR7,#58HMOVR0,#08HCLR_RAM:MOVR0,AINCR0DJNZR7,CLR_RAMCLRAMOVR0,AMOVR1,AMOVR2,AMOVR3,AMOVR4,AMOVR5,AMOVR6,AMOVR7,ACLRTR1CLRTR0RETDELAY:MOVR7, #030HDELAY_LOOP:NOPNOPDJNZR7, DELAY_LOOPRET;R4R5/R6- R2R3 SDIV: MOV R2,#0 MOV R3,#0 DDLO: CLR C MOV A,R5 SUBB A,R6 MOV R5,A MOV A,R4 SUBB A,#0 MOV R4,A JC DDN1 MOV A,R3 ADD A,#1 MOV R3,A MOV A,R2 ADDC A,#0 MOV R2,A SJMP DDLO DDN1: NOP RET;双字节无符号数减法程序 (R4R5-R0R1)=(R4R5);入口 :R0,R1,R4,R5;占用资源:ACC;堆栈需求:2字节;出口 :R4,R5NSUB:MOV A,R5 CLR C SUBB A,R1 MOV R5,A MOV A,R4 SUBB A,R0 MOV R4,A RETNADD:MOVA, R5CLRCADDA, R1MOVR5, AMOVA, R4ADDCA, R0MOVR4, ARETWAIT250MS:NO