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org 0000h mov r0,#0bh ;dia chi cua thanh ghi B mov a,#0 ;du lieu nap vao thanh ghi B movx @r0,a ;cho phep chinh cai dat gio mov a,#giayhientai mov r0,#0 ;dia chi cua o nho giay movx @r0,a ;nap giay hien tai "# , ()* &/)IJ  *  J  *  J  *  J   >B KL.ML L L 


80 mov a,#phuthientai mov r0,#02 ;dia chi cua o nho phut movx @r0,a ;nap phut hien tai mov a,#giohientai mov r0,#04 ;dia chi cua o nho gio movx @r0,a ;nap gio hien tai mov r0,#0ah ;dia chi cua thanh ghi A mov a,#020h ;tu dieu khien cua thanh ghi A movx @r0,a ;cho phep bo dao dong chay lcall delay50 sjmp $ ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx delay50: mov 7eh,#0fh del12: mov 7dh,#0ffh del11: djnz 7dh,del11 djnz 7eh,del12 ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx end
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;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chuong trinh dieu khien LCD hien thi chuoi thong tin ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;dinh nghia cac bien E BIT P1.0 rw BIT P1.1 rs BIT P1.2 byteout equ p2 dklcd equ 70h bdn equ r6 giay equ r5 phut equ r4 gio equ r3 org 0000h mov sp,#68h ; lcall khoitao_rt ;goi chtr con khoi tao real time lcall khoitao_lcd ;goi chtr khoi tao LCD lcall xoavnh_hthi ;xoa vung nho hien thi main1: lcall doc_gpg ;doc thong so gio-phut-giay tu real time lcall bcd_maascii ;chuyen so bcd sang ma ASCII lcall hienthichung ;goi ra LCD de hien thi sjmp main1 ;tiep tuc ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chtr con doc gio phut giay ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx doc_gpg: mov r0,#00 movx a,@r0 mov giay,a "# , ()* &/)IJ  *  J  *  J  *  J   >B 9
7

KL.ML L L 

mov r0,#02 movx a,@r0 mov phut,a mov r0,#04 movx a,@r0 mov gio,a ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chtr con chuyen so bcd sang ma ASCII ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx bcd_maascii: mov a,giay anl a,#0fh add a,#30h mov 4fh,a mov a,giay anl a,#0f0h swap a add a,#30h mov 4eh,a mov a,phut anl a,#0fh add a,#30h mov 4ch,a mov a,phut anl a,#0f0h swap a add a,#30h mov 4bh,a mov a,gio anl a,#0fh add a,#30h mov 49h,a mov a,gio anl a,#0f0h swap a add a,#30h mov 48h,a ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;Chuong trinh con hien thi noi dung tren LCD cua2 vung nho ;40H->4Fh hang 1 ;50H-> 5Fh hang 2; ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx hienthichung: mov A,#080h ;set DDRAM lcall ktao mov r1,#16 mov r0,#40h ;bat dau tu 0 fline: lcall Write djnz r1,fline mov a,#0c0h ;set DDRAM lcall ktao mov r1,#16 sline: lcall Write "# , ()* &/)IJ  *  J  *  J  *  J   >B KL.ML L L 


8// djnz r1,sline ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chtr con goi data hien thi ra LCD ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx write: mov a,@r0 write1: mov byteout,a lcall data_byte inc r0 ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chtr con khoi tao LCD ;chuong trinh dieu khien LCD 16X2 tren kit vi dieu khien LOAI NHO ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx khoitao_lcd: mov dklcd,#0 lcall khtaolcd ;khoi tao lcd ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chtr con khoi tao LCD ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx khtaolcd: setb e ;Enable clr rs ;RS low clr rw ;RW low mov a,#38h ;tu dieu khien LCD lcall ktao lcall ddelay41 ;delay 4.1 mSec mov A,#38h ;function set lcall ktao lcall ddelay100 ;delay mov A,#38h ;function lcall ktao mov A,#0ch ;tu dieu khien display on lcall ktao mov A,#01h ;tu dieu khien Clear display lcall ktao mov A,#06h ;tu dieu khien entry mode set lcall ktao mov A,#80h ;thiet lap dia chi LCD (set DD RAM) lcall ktao ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chuong trinh con khoi tao LCD ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ktao: mov byteout,a lcall command_byte ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;Feed command/data to the LCD module ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx command_byte: clr rs ;RS low for a command byte ljmp bdelay "# , ()* &/)IJ  *  J  *  J  *  J   >B 9
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data_byte: setb rs ;RS high for a data byte bdelay: clr rw ;R/W low for a write mode clr e nop setb e ;Enable pulse nop nop mov byteout,#0ffh ;configure port1 to input mode setb rw ;set RW to read clr rs ;set RS to command clr e ;generate enable pulse nop nop setb e lcall ddelay100 ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chuong trinh con delay 4.1 ms ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ddelay41: mov 7eh,#90h del412: mov 7fh,#200 djnz 7fh,$ djnz 7eh,del412 ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chuong trinh con delay 255 microgiay ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ddelay100: mov 7fh,#00 djnz 7fh,$ ret delay1giay: mov 7ah,#20 xx2: mov 7bh,#0 xx1: mov 7ch,#0 djnz 7ch,$ djnz 7bh,xx1 djnz 7ah,xx2 ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chuong trinh con khoi tao real time ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx khoitao_rt: mov r0,#0bh mov a,#0 movx @r0,a ;cho phep chinh cai dat gio mov r0,#0 movx @r0,a ;giay = 0 mov r0,#02 movx @r0,a ;phut = 0 mov r0,#04 movx @r0,a ;gio = 0 "# , ()* &/)IJ  *  J  *  J  *  J   >B KL.ML L L 


8/8 mov r0,#0ah mov a,#020h movx @r0,a ;cho phep bo dao dong chay lcall delay1giay ret ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;chuong trinh con xoa vung nho hien thi ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xoavnh_hthi: mov r0,#40h mov a,#' ' xoac: mov @r0,a inc r0 cjne r0,#60h,xoac ret end (D'*(G-%>X
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