Main business: MOV SP, # SP transfer SP, calculate SP immediately.
MOV 30H, # 08H transmits 30H, and counts 08H immediately.
MOV P 1，# FFH； Transfer interface 1, and count FFH immediately.
MOV P0，FFH； Transport interface 0, FFH
CLR TR0 clears 0 TR0.
To: MOV TMOD, # 01h; Transfer TMOD and count 0 1H immediately.
MOV TH0, # 3CH sends TH0 and immediately counts 3CH.
MOV TL0, # 0B0H turns to TL0, and immediately counts 0B0H.
SETB TR0； Bit group 1 TR0
T 1: MOV 30H，# 50； Send 30 hours, and count 50 immediately.
M8: CJNE 30H，#00H，M8； Comparison-Unequal rotation for 30H, immediate counting for 00H,
CJNE 3 1H，08H，M7； Comparison-inequality conversion 3 1H, 08H,
MOV P 1，FFH； Transmission interface 1, FFH
MOV P0，FFH； Transport interface 0, FFH
1February 365438+0h; Negative 1 3 1H
SJMP t 1； Transition to T 1
M7: CJNE 3 1H，07H，M6； Comparison-inequality transformation 3 1H, 07H,
MOV P 1，FFH； Transmission interface 1, FFH
Movp0,00h transmission interface 0,00h
1February 365438+0h; Negative 1 3 1H
SJMP t 1； Transition to T 1
M6: CJNE 3 1H，06H，M5； Comparison-inequality transformation 3 1H, 06H,
MOV p 1 . 00H； Transmission interface 1.00h
MOV P0，FFH； Transport interface 0, FFH
1February 365438+0h; Negative 1 3 1H
SJMP t 1； Transition to T 1
M5: CJNE 3 1H，05H，M4； Comparison-inequality transformation 3 1H, 05H,
MOV P 1, F0H transmission interface 1, F0H
MOV P0, F0H transmission interface 0, F0H
1February 365438+0h; Negative 1 3 1H
SJMP t 1； Transition to T 1
M4: CJNE 3 1H，04H，M3； Comparison-inequality conversion 3 1H, 04H,
MOV P 1，AAH； Transmission interface 1, AAH
MOV P0，AAH； Transport interface 0, AAH
1February 365438+0h; Negative 1 3 1H
SJMP t 1； Transition to T 1
M3: CJNE 3 1H，03H，M2； Comparison-inequality transformation 3 1H, 03H,
MOV P 1，CCH； Transmission interface 1, CCH
MOV P0，CCH； Transport interface 0, CCH
1February 365438+0h; Negative 1 3 1H
SJMP t 1； Transition to T 1
M2: CJNE 3 1H，02H，m 1； Comparison-inequality transformation 3 1H, 02H,
MOV P 1, 55H transmission interface1.55h.
MOV P0, 55H transmission interface 0.55h.
1February 365438+0h; Negative 1 3 1H
LJMP t 1； Long transfer to T 1
M 1: CJNE 3 1H，0 1H； Comparison-inequality transformation 3 1H, 0 1H
MOV P 1, 33H transmission interface1.33h.
Movp0,33H transmission interface 0,33h
MOV 3 1H, 08H transfer 3 1H, 08H
LJMP t 1； Long transfer to T 1
*************************************** ; ***************************************
; Interrupt service routine (short for interrupt service routine)
*************************************** ; ***************************************
INT 1: push 30H to stack for 30h.
Push 31h; Stack 3 1H
CLR TR0 clears 0 TR0.
MOV TMOD，# 0 1H； Transfer TMOD and count 0 1H immediately.
MOV TH0, # 3CH sends TH0 and immediately counts 3CH.
MOV TL0, # 0B0H turns to TL0, and immediately counts 0B0H.
1February 30th h; Negative 1 30 hours
POP 3 1H； Off-stack 3 1H
POP 30H is outside the stack 30H,
SETB TR0； Bit group 1 TR0
RETI； Interrupt return