按键控制数码管显示实验程序概要Word文件下载.docx
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AJMPMAIN
ORG0080H
MAIN:
LCALLKEYSCAN
MOVA,R7
JZMAIN
LCALLDISPLAY
JMPMAIN
函数名:
DISPLAY
输出参数:
R7
DISPLAY:
K1:
CJNER7,#0x11,K2
MOVR0,#0x80
MOVR1,#0xC0
LCALLSEND
JMPDISPLAY_OVER
K2:
CJNER7,#0x21,K3
MOVR0,#0x40
MOVR1,#0xf9
JMPDISPLAY_OVERK3:
CJNER7,#0x41,K4
MOVR0,#0x20
MOVR1,#0xa4
JMPDISPLAY_OVERK4:
CJNER7,#0x81,K5
MOVR0,#0x10
MOVR1,#0xB0
JMPDISPLAY_OVERK5:
CJNER7,#0x12,K6
MOVR0,#0x08
MOVR1,#0x99
JMPDISPLAY_OVERK6:
CJNER7,#0x22,K7
MOVR0,#0x04
MOVR1,#0x92
JMPDISPLAY_OVERK7:
CJNER7,#0x42,K8
MOVR0,#0x02
MOVR1,#0x82
JMPDISPLAY_OVERK8:
CJNER7,#0x82,K9
MOVR0,#0x01
MOVR1,#0xf8
JMPDISPLAY_OVERK9:
CJNER7,#0x14,K10
MOVR1,#0x80
JMPDISPLAY_OVERK10:
CJNER7,#0x24,K11
MOVR1,#0x90
K11:
CJNER7,#0x44,K12
MOVR1,#0x88
K12:
CJNER7,#0x84,K13
MOVR1,#0x83
K13:
CJNER7,#0x18,K14
MOVR1,#0xC6
K14:
CJNER7,#0x28,K15
MOVR1,#0xA1
K15:
CJNER7,#0x48,K16
MOVR1,#0x86
K16:
CJNER7,#0x88,DISPLAY_OVER
MOVR1,#0x8e
DISPLAY_OVER:
RET
KEYSCAN
KEYSCAN:
MOVROW,#0
MOVCOLUMN,#0
MOVP2,#0x0F
MOVA,P2
CJNEA,#0x0F,ROW1
JMPSTEP1
ROW1:
;
行扫描
CJNEA,#0x07,ROW2
MOVROW,#0x01
ROW2:
CJNEA,#0x0B,ROW3
MOVROW,#0x02
ROW3:
CJNEA,#0x0D,ROW4
MOVROW,#0x04
ROW4:
CJNEA,#0x0E,STEP1
MOVROW,#0x08
STEP1:
列扫描
MOVP2,#0xF0
CJNEA,#0xF0,COLUMN1
JMPSTEP2
COLUMN1:
CJNEA,#0xE0,COLUMN2
MOVCOLUMN,#0x10
COLUMN2:
CJNEA,#0xD0,COLUMN3
MOVCOLUMN,#0x20
COLUMN3:
CJNEA,#0xB0,COLUMN4
MOVCOLUMN,#0x40
COLUMN4:
CJNEA,#0x70,STEP2
MOVCOLUMN,#0x80
STEP2:
MOVA,ROW
ORLA,COLUMN
MOVR7,A
Send
输入参数:
R0=位选,R1=段选
SEND:
MOVP0,R0;
先发位选
SETBLE1
CLRLE1
MOVP0,R1;
再发段码
SETBLE2
CLRLE2
END