数控直流稳压电源设计方案 第6页

数控直流稳压电源设计方案 第6页
KEYSCAN:   PUSH         PSW
           PUSH         ACC
           PUSH         B
           PUSH         DPH
           PUSH         DPL
           SETB         RS0
           SETB         RS1
           ACALL        DELAY1                 ;消抖延时
           JNB          P3.3,LIST
           MOV          DPTR,#PORTA            ;恢复B口输出低电平
           MOV          A,#00H
           MOVX         @DPTR,A
           POP          DPL
           POP          DPH
           POP          B
           POP          ACC
           POP          PSW
           RETI                                ;没有按
LIST:      MOV          DPTR,#PORTC
           MOVX         A,@DPTR
           MOV          3BH,A
           MOV          R2,#0FEH
           MOV          R3,#00H
LINE0:     MOV          DPTR,#PORTA
           MOV          A,R2
           MOVX         @DPTR,A
           MOV          DPTR,#PORTC
           MOVX         A,@DPTR
           JB           ACC.0,LINE1
           MOV          A,#0
           AJMP         TRYK
LINE1:     JB           ACC.1,LINE2
           MOV          A,#1
           AJMP         TRYK
LINE2:     JB           ACC.2,LINE3
           MOV          A,#2
           AJMP         TRYK
LINE3:     JB           ACC.3,NEXT
           MOV          A,#3
           AJMP         TRYK
NEXT:      ;INC          R3
           MOV          A,R3
           ADD          A,#4
           MOV          R3,A

           MOV          A,R2
           JNB          ACC.3,EXIT
           RL           A
           MOV          R2,A
           AJMP         LINE0
EXIT:      MOV          DPTR,#PORTA              ;恢复B口输出低电平
           MOV          A,#00H
           MOVX         @DPTR,A
           POP          DPL
           POP          DPH
           POP          B
           POP          ACC
           POP          PSW
           RETI                                  ;没有按
TRYK:      ADD          A,R3
           MOV          3AH,A

LETK:      MOV          DPTR,#PORTC
           MOVX         A,@DPTR
           XRL          A,3BH
           JZ           LETK
           MOV          DPTR,#PORTA              ;恢复B口输出低电平
           MOV          A,#00H
           MOVX         @DPTR,A
           POP          DPL
           POP          DPH
           POP          B
           POP          ACC
           POP          PSW
           RETI

 

 

 

;*******************电流设置****************
SETONE:
           SETB         RS0
           SETB         RS1
           ;SETB         01H                     ;置显示闪烁位
SETONE1:   MOV          A,3AH
           CJNE         A,#10,L1
L1:        JNC          SETONE1

           JB           00H,L3
           CJNE         A,#2,L2                  ;2000MA
           MOV          DISP0,#2
           MOV          DISP1,#0
           MOV          DISP2,#0
           MOV          DISP3,#0

           ;CLR          01H
           CLR          RS0
           CLR          RS1
           PUSH         PSW
           SETB         RS1
           ACALL        BCDHEX                   ;十辣位BCD变十辣进制
           ACALL        SUBBV                    ;*2再送DA
           POP          PSW
           CLR          A
           RET
L2:        MOV          3AH,#0FFH
           JNC          SETONE1
           SETB         00H

L3:        MOV          @R1,A                    ;即时刷新显示缓冲区
           INC          R1
           MOV          3AH,#0FFH
www.751com.cn
           ;CLR          01H
           CLR          RS0
           CLR          RS1

           PUSH         PSW
           SETB         RS1
           ACALL        BCDHEX                  ;16字节BCD变二进制
           ACALL        SUBBV                   ;*5/8
           POP          PSW
           CLR          A
           RET
;**********加电流
JIA:       MOV          3AH,#0FFH
           MOV          A,DISP3
           INC          A
           MOV          DISP3,A
           CJNE         A,#10,OUT
           MOV          DISP3,#0
           MOV          A,DISP2
           INC          A
           MOV          DISP2,A
           CJNE         A,#10,OUT
           MOV          DISP2,#0
           MOV          A,DISP1
           INC          A
           MOV          DISP1,A
           CJNE         A,#10,OUT
           MOV          DISP1,#0
           MOV          A,DISP0

上一页  [1] [2] [3] [4] [5] [6] [7] [8] 下一页

数控直流稳压电源设计方案 第6页下载如图片无法显示或论文不完整，请联系qq752018766