Discussion in "Project Help" started by    vijay_zone1087    Sep 11, 2006.
Mon Sep 11 2006, 12:12 am
#1
hi to everyone
i am new to this form and i require help
i want to interface 8255 to 89c51
how to configure the hardware and
how should i initialize 8255 in my "c" program which i have to
execute in keil
i read the data sheet but i understood very less from it
do u have a example program !
Tue Sep 12 2006, 12:23 pm
#2
can u tell me with details, then i can u felp u. i have write an programme with 89c52, 8255 PIO, 62256 ram, 74373,74138.etc write with asm.
Tue Sep 12 2006, 04:14 pm
#3
thanks for u r reply
can u u give me the schematic and 8255 initialization
so that i can use it for my work
thanks!
Tue Sep 12 2006, 06:00 pm
#4
hi vijay, do you know how to interface RAM with 8051?
if yes then it wil be simple to interface 8255 for you. after u interface 8255 with 8051 on a specific address, the Port A will have that address the next address wil be of PORTB and next is of PORTC and the fourth address will be of Control Register.
and the way u address memory in C same way u address here.
i hope this is helpful to you.
Tue Sep 12 2006, 10:36 pm
#5
hi rickey
i am new to controller based hardware and interfacing
if u have example schematic and intrefacing program in c
please provide me if u can
thanks!
Wed Sep 13 2006, 04:44 pm
#6
sure i will do that.
wait for some time. tell me what software you use for schematics? so that i can make a software compliant schematic. and tell me if its ok with a pdf format schematic.
Thu Sep 14 2006, 12:49 am
#7
yes pdf format is ok
and interfacing program in keil if its ok to u
that is initialization of 8255 and other memory components
thanks rickey for taking interest!
Fri Sep 22 2006, 12:00 am
#8
hi rickey
i was expecting for ur reply
ie i was expecting for program if u can give me it will be a pleasure for me!
thanking u!
Fri Sep 22 2006, 12:09 pm
#9
really sorry vijay, i actually forgot it...
dont worry you'll get it within two days.. including circuit+code.
Sun Sep 24 2006, 01:09 am
#10
Look at My design 8255

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