Ch 4 – TK hệ VXL

Các thí dụ minh họa

LED Blinking

XTAL218

XTAL119

ALE30

EA31

PSEN29

RST9

P0.0/AD0 39

P0.1/AD1 38

P0.2/AD2 37

P0.3/AD3 36

P0.4/AD4 35

P0.5/AD5 34

P0.6/AD6 33

P0.7/AD7 32

P2.7/A15 28

P2.0/A8 21

P2.1/A9 22

P2.2/A10 23

P2.3/A11 24

P2.4/A12 25

P2.5/A13 26

P2.6/A14 27

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P3.0/RXD 10

P3.1/TXD 11

P3.2/INT0 12

P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

U1

80C51

B1 S1

R0110k

R0010k

R30330R

R31330R

DB1 DS1

X1

16MHzCX133p

CX233p

CRST10n

RRST10k

B2

R32330R

DB2

D1LED-GREEN

D2LED-GREEN

D3LED-GREEN

D4LED-GREEN

D5LED-GREEN

D6LED-GREEN

D7LED-GREEN

R1330R

R2330R

R3330R

R4330R

R5330R

R6330R

R7330R

R8330R

D8LED-GREEN

Blink01.asm (1/2)xtal equ 12 ; Crystal frequency in MHzPattern equ 0FEh

org 0

mov P0,#00000011b ; Dat cau hinh P0.1 va P0.0 la Input mov P3,#10000000b ; Dat cau hinh P3.7 la Input mov P1,#Pattern

back:

; copy port0 switch B1,S1 states to acc mov a,P0 anl a,#00000011b ; P0.1 and P0.0 are selected orl a,#10000000b ; prepare P3.7 for input

; Sao chep bit P3.7 vao bit P3.2 mov C, p3.7 mov acc.2, C mov P3,a

Blink01.asm (2/2)mov A, P1jb P0.1, RoR; Xoay trai P1 RL A sjmp NextRoR:; Xoay phai P1 RR ANext: mov P1, A; delay for 25ms delay mov A,#250 acall dly100u sjmp back

dly100u:; delay loop takes;

mov r1,Adlylp1: mov r0,#(xtal*62/10)dlylp2: djnz r0,dlylp2

djnz r1,dlylp1 ret

end

Boole_Up BCD counter_7seg LED

XTAL218

XTAL119

ALE30

EA31

PSEN29

RST9

P0.0/AD0 39

P0.1/AD1 38

P0.2/AD2 37

P0.3/AD3 36

P0.4/AD4 35

P0.5/AD5 34

P0.6/AD6 33

P0.7/AD7 32

P2.7/A15 28

P2.0/A8 21

P2.1/A9 22

P2.2/A10 23

P2.3/A11 24

P2.4/A12 25

P2.5/A13 26

P2.6/A14 27

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P3.0/RXD 10

P3.1/TXD 11

P3.2/INT0 12

P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

U1

80C51

X1

16MHzCX133p

CX233p

CRST10n

RRST10k

R1

270R

R2

270R

R3

270R

R4

270R

R5

270R

R6

270R

R7

270R

;TD: boole04.asm; Minh hoa cac lenh nhay theo tri bien Boole: JC, JNC, JB, JNB, JBC ; Mo phong mach dem 10: ngo ra nhi phan o 4 bit thap P2, duoc noi voi mach hien

thi so; xung nhip CK (kich canh xuong) duoc noi chan P3.7CK EQU P3.7

MOV P3,#80H ; Dat cau hinh P3.7 INPUTMOV R0,#0 ; So dem ban dau la 0MOV P0,#0C0H; Dau tien so dem la 0

LOOP:JNB CK,$ ; Doi CK o muc 1JB CK,$ ; Doi CK o muc 0 ==> phat hien duoc canh xuongINC R0CJNE R0,#10,NEXTMOV R0,#0

NEXT:MOV A,R0ACALL BCD2LEDSJMP LOOP

BCD2LED:MOV DPTR,#LED_DATAMOVC A,@A+DPTRMOV P0,ARET

LED_DATA:DB 0C0H, 0F9H, 0A4H, 0B0H, 99H, 92H, 82H, 0F8H, 80H, 90HRETEND

Boole_Up BCD counter_7seg LEDUsing Timer 0

XTAL218

XTAL119

ALE30

EA31

PSEN29

RST9

P0.0/AD0 39

P0.1/AD1 38

P0.2/AD2 37

P0.3/AD3 36

P0.4/AD4 35

P0.5/AD5 34

P0.6/AD6 33

P0.7/AD7 32

P2.7/A15 28

P2.0/A8 21

P2.1/A9 22

P2.2/A10 23

P2.3/A11 24

P2.4/A12 25

P2.5/A13 26

P2.6/A14 27

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P3.0/RXD 10

P3.1/TXD 11

P3.2/INT0 12

P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

U1

80C51

X1

12MHzCX133p

CX233p

CRST10n

RRST10k

R1

270R

R2

270R

R3

270R

R4

270R

R5

270R

R6

270R

R7

270R

;TD: counter01.asm; Minh hoa su dung chuc nang counter cua 8051 ; Su dung T0 che do 2 lam counter voi CLK la chan P3.4 (T0); counter nay co modulo 10, nghia là dem het 9 thi tranCOUNT EQU -10

SETB P3.4 ; dat cau hinh input cho P3.4MOV TMOD,#6 ; Timer 0: counter mode 2MOV TH0, #COUNTMOV TL0, #COUNTSETB TR0

LOOP:MOV A,TL0ADD A,#-COUNTCALL BCD2LEDMOV P0,ASJMP LOOP

BCD2LED:MOV DPTR,#LED_DATAMOVC A,@A+DPTRMOV P0,ARET

LED_DATA:DB 0C0H, 0F9H, 0A4H, 0B0H, 99H, 92H, 82H, 0F8H, 80H, 90HRETEND