chuong trinh dieu khien dong co khong dong bo 3 pha pptx

;chuong trinh dieu khien dong co khong dong bo 3 pha

;viet cho vi dieu khien 8051

;thuc hien truyen thong noi tiep UART voi may tinh

;toc do truyen 9600, khong kiem tra chan le, 8 bit du lieu, 1 bit dung

;thach anh su dung la 11,0592Mhz

;---------------------------------------------------------------------------------------------

;dinh nghia cac chan vao ra

quay_thuan equ p1.0 ;chan dieu khien quay thuan

quay_nguoc equ p1.1 ;chan dieu khien quay nguoc

cam_bien equ p3.4 ;chan nhan xung dem tu encoder

;su dung encoder E6B2-C cua OMRON chon ty le 100 xung tren 1 vong

;--------------------------------------------------------------------------------------------

org 0

jmp main

;-----------------khai bao dia chi vector ngat noi tiep---------------------------

org 23h

jnb ri,thoat_ngat ;kiem tra ngat nhan

mov a,sbuf ;doc ky tu nhan duoc vao A

cjne a,'1',so_sanh_tiep1 ;kiem tra xem ky tu nhan duoc co phai la tin hieu

chon quay thuan

clr quay_nguoc

setb quay_thuan ;chon quay thuan

jmp thoat_ngat

so_sanh_tiep1:

cjne a,'2',so_sanh_tiep2 ;kiem tra xem ky tu nhan duoc co phai la tin hieu

chon quay nguoc

clr quay_thuan

setb quay_nguoc ;chon quay nguoc

jmp thoat_ngat

so_sanh_tiep2:

cjne a,'0',thoat_ngat ;kiem tra xem ky tu nhan duoc co phai la tin hieu

chon dung

clr quay_thuan

clr quay_nguoc ;chon dung quay

thoat_ngat:

reti

;----------------bat dau chuong trinh chinh---------------------------------------

main:

mov ie,#10010000b ;cho phep ngat noi tiep

;thiet lap khung du lieu noi tiep

MOV TMOD,#20h ;Timer 1 in Auto-reload mode

MOV TH1,#0FDh ;Reload value for 9600 baud @ 11.059 Mhz

SETB TR1 ;Turn on timer 1

mov scon,#50h ;cho phep nhan du lieu noi tiep

;------------------------------------------------------------------------------------------