89c51 Raining Cou > Lesson7

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S3

S4

S5

S6

INT0

RESET

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;----------- read key S6 every 10ms ---------read_s6:

mov dptr,#gpio2 movx a,@dptr jb acc.7, exit_read_s6 setb flag1.7 ; to tell next task ; that S6 has been pressed ret

exit_read_s6: clr flag1.7 ret ;----------- service key S6 ----------------execute_s6: jnb flag1.7,exit_execute_s6 mov command,#'m' call adjust_min exit_execute_s6: ret

;-------- main loop running -------------main: call wait_tick call update_clock call LED_on call LED_off call print_time call get_command call adjust_min call adjust_hour ; read S6 push button call read_s6 call execute_s6 jmp main =$1)$$1&23&1-\1L$0153)14$3/1$($401+E@)1"01&3)L14$3/1-\,1]6/1'&15'JJ1@3L$1@'6.&$1&71"$ .>/3&$/1$($401+E@), Q751%3615$1)&7>14$3/'6?1-\136/14$>$3&1$N$%.&'6?1.>/3&$1@'6.&$152'J$1-\123)1"$$6 >4$))$/_

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mov dptr,#gpio2 movx a,@dptr jb acc.7, exit_read_s6 setb flag1.7 ; to tell next task ; that S6 has been pressed ret

exit_read_s6: clr flag1.7 clr flag1.6 ret ;----------- service key S6 ----------------execute_s6: jnb flag1.7,exit_execute_s6 jnb flag1.6,just_pressed ret just_pressed: setb flag1.6 ;to tell execute_s6 has been executed mov command,#'m' call adjust_min exit_execute_s6: ret "5"*6+#"&'79( +,! ^7/'8013"7($1&3)L)15'&218J3?+,\13//'6?,1]))$@"J$1&2$1%7/$136/1&$)&14.6K16751J$& >4$))1-\13?3'6,1=23&1/7$)1@'6.&$1'6%4$@$6&'6?1J77L1J'L$_

clear bit flag1.7 clear bit flag1.6

S6 = 0

S6 = 1

Set bit flag1.7

Read S6 key

TF0 = 1 Execute S6 Flag1.7 = 1 and flag1.6 = 0 Adjust minute set bit flag1.6

Flag1.7=0

Flag1.7 = 1 and flag1.6 = 1

Wait tick

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#;<=>?&@AB?&CAD&"E?D@FG?&'74 $mod51 $include(mypaulm2.equ) gpio1 gpio2

equ 100h equ 200h

dseg at 20h flag1:

ds 1

dseg at 50h tick: ds 1 counter1: ds 1 timer3: ds 1 temp: ds 1 cseg at 8000h jmp start org 8100h ;---- initialization code ---------------start: orl tmod,#1 ; set timer0 to mode1 setb tr0 mov flag1,#1 mov counter1,#0 mov temp,#1 mov timer3,#0 ;-------- main loop running -------------main: call wait_tick call shift_left call shift_right jmp main ;------- subroutines ---------------------wait_tick: jnb tf0,$ clr tf0 orl th0,#0dch ret shift_left: jnb flag1.0,exit_left inc timer3 mov a,timer3 cjne a,#10,exit_left

mov timer3,#0 mov a,temp mov dptr,#100h movx @dptr,a rl a mov temp,a inc counter1 mov a,counter1 cjne a,#7,exit_left mov counter1,#0 setb flag1.1 clr flag1.0

exit_left: ret shift_right: jnb flag1.1,exit_right inc timer3 mov a,timer3 cjne a,#10,exit_right mov timer3,#0 mov a,temp mov dptr,#100h movx @dptr,a rr a mov temp,a inc counter1 mov a,counter1 cjne a,#7,exit_right mov counter1,#0 setb flag1.0 clr flag1.1 exit_right: ret end