giải đáp thắc mắc về code

[traibk99]

e đang làm đồ án thiết kế trạm cân sử dụng loadcell.
mà chạy code dưới đây thì ko hiển thị đc lên lcd. achị chỉ giúp lỗi sai với
Ale equ p2.1

Oec equ p2.0

Oe equ p2.2

Ka equ p2.3

Kb equ p2.4

Kc equ p2.5

Rs equ p1.0

Rw equ p1.1

E equ p1.2

Org 0000h

Jmp main

Org 23h

Jmp isr_com

Main:

Jb p1.3,$

Mov ie,#10010000b ;ngat com 232, ngat timer0

Mov tmod,#00100000b ; timer1 che do 2 tao nhip cho toc do buad

Mov th1,#0fdh ; 9600 . ta 11.0592mhz

Mov scon,#50h ;1start ,8,n,cho phep ren

Mov p0,#0ffh ;xac lap cong doc vao

Setb tr1

Lap_ko_xuat_data_len_pc:

Call doc_loadcell

Call delay

Call hien_thi_lcd

Mov 30h,a

Cjne a,#'s',Lap_ko_xuat_data_len_pc

Co_ket_noi_may_tinh:

Call doc_loadcell

Call delay

Mov a,40h

Mov sbuf,a;xuat len may tinh

Call hien_thi_lcd

ljMp co_ket_noi_may_tinh

Doc_loadcell:

Clr Ka

Clr Kb

clr kc

clr oe

Setb ale

Nop

Nop

Nop

Nop

Clr ale;cho cho chuyen doi xong

Call delay

Clr p1.0

Setb oe

Nop

Nop

Mov a,p0

Mov 40h,a

Clr oec

Ret

Tach_chuyen_doi_ma_thap_phan_to_ascii:

Mov a,40h

Mov b,#100

Div ab

Mov 41h,a;luu hang tram

Mov a,b

Mov b,#10

Div ab

Mov 42h,a;luu hang chuc

Mov 43h,b;luu hang don vi

Mov r0,#40h

Mov r1,#50h

Giai_ma_tiep:

Mov a,@r0

Clr c

Add a,#48

Mov @r1,a

Inc r0

Inc r1

Cjne r1,#53h,giai_ma_tiep

Ret

Khoi_tao_lcd:

Mov a,#38h;chon lcd hien thi 2dong matrix 5*7

Call guilenh;chuong trinh con nap lenh

Call delay

Mov a,#0Ch;hien thi man hinh va nhap nhay con tro

Call guilenh

Call delay

Mov a,#80h;dich sang phai

Call guilenh

Call delay

Ret

Hien_thi_lcd:

mov a,#'k';chu k

Call hienthi

Call delay

Mov a,#'h';chu h

Call hienthi

Call delay

Mov a,#'o';chu o

Call hienthi

Call delay

Mov a,#'i';chu i

Call hienthi

Call delay

Mov a,#'L';chu l

Call hienthi

Call delay

Mov a,#'u';chu u

Call hienthi

Call delay

Mov a,#'o';chu o

Call hienthi

Call delay

Mov a,#'n';chu n

Call hienthi

Call delay

Mov a,#'g';chu g

Call hienthi

Call delay

Mov a,50h;con so hang van

Call hienthi

Call delay

Mov a,50h;con so hang nghin

Call hienthi

Call delay

Mov a,50h;con so hang tram

Call hienthi

Call delay

Mov a,#'0';con so hang chuc

Call hienthi

Call delay

Mov a,#0;con so hang donvi

Call hienthi

Call delay

Mov a,#'g';don vi g

Call hienthi

Call delay

Guilenh:

Mov p1,a;dua ma lenh ra p1

Clr rs;dat rs=0 de thuc hien gui lenh

Clr rw;dat rw=0 de thuc hien ghi

Setb e;dua chan e len cao de chuan bi chot data

Clr e;cho xong xuon de chot

Ret

Hienthi:

Mov p1,a

Setb rs;thuc hien ghi du lieu ht

Clr rw

Setb e

Clr e

Ret

Delay:

Mov r7,#50

Dell:

Mov r6,#0ffh

Djnz r6,$

Djnz r7,dell

Ret

Isr_com:

Jnb ri,trans

Mov a,sbuf

Mov 30h,a

Clr ri

Reti

Trans:

Clr ti

Reti

END