AT89S52 Basketball Timer Write for help

130 points, haha, give it to me, thank you!

org 0000h

jmp begin

org 000bh

ljmp t0isr

org 0030h

table: ;The common cathode digital tube shows **Table DB 3FH, 06H, 5BH, 4FH, 66H; 01234db 6dh,7dh,07h,7fh,6fh ;56789;--

begin:

mov tmod,#01h

mov th0,#high(65536-50000)mov tl0,#low(65536-50000)setb tr0

setb et0

setb ea

mov r2,#

sjmp $

t0isr:

clr tr0

mov th0,#high(65536-50000)mov tl0,#low(65536-50000)setb tr0

mov dptr,#table

mov a,r2

movc a,@a+dptr

mov p1,a

inc r2

cjne r2,#10,t0e

mov r2,#

t0e:retiend

Hello! Is it C or a library? A schematic is required to know the line connection.

Timer 0 16-bit count mode.

#include

void inittimer0(void)void main(void)

void timer0interrupt(void) interrupt 1

Timer 2 16-bit auto-reload mode.

#include

void inittimer2(void)void main(void)

void timer2interrupt(void) interrupt 5

tmod is a timer register, which is gate c t m1 m0 gate c t m1 m0 the upper four bits are the timer t1 control word, and the lower four bits are the timer t0 control word. Gate is the gating bit, and if it is 0, tr0 tr1=1 starts the timer. If the timer is 1, the timer can be started only when the external interrupt int0 int1=1 is interrupted.

c t is the timing counting mode selection bit, the timing mode is 0, and the technical mode is 1. m1 m0 sets the bit for the working mode, and there are four working modes, most of which are using mode 1.

th0 and tl0 are the upper eight and eight bits of the timer t0, respectively.

tmod: timer register.

th0: Timer 0 register bit.

tl0: timer 0 register low.

org 0000h

sjmp sta

org 000bh

ljmp t0isr

org 0050h

sta:mov sp,#5fh

mov tmod,#11h

mov tl0,#low(65536-50000)mov th0,#high(65536-50000) ;The timer interrupts once every 50 milliseconds.

mov r2,#60 ;60 * 50 = 3000 milliseconds, which is 3 seconds.

setb tr0

setb et0

clr 00h

setb ea

loop:jnb 00h,loop

clr 00h

sjmp loop

t0isr:

push acc

clr tr0

mov tl0,#low(65536-50000)mov th0,#high(65536-50000)setb tr0

dec r2

mov a,r2

jnz t0isre

setb 00h ;3 seconds to set, set MOV R2,

t0isre:

pop acc

retiend

50 milliseconds first, then 1 second, then 1 minute, 1 hour, and finally 7 hours.