How to interface computer’s Serial Port (RS232) with 8051 microcontroller (AT89C51)

[vids]

hey i wanted a program for How to interface computer’s Serial Port (RS232) with 8051 microcontroller (AT89C51) asap plz…(not C program)

[phanindra nath]

if not C, den which language you want? assembly?

[vids]

yeah i wnt it in assembly lang…. thnks

[Mehtab Ali]

this program sends ‘ear’ serially 9600 baud,8bit data,1 stop bit.

 

                         mov tmod,#20h

                         mov th1,#-3

                         mov scon,#50h

                        setb tr1

h:                      mov a,#”e”

                         acall t

                       mov a,#”a”

                       acall t

                      mov a,#”r”

                     acall t

                     sjmp h

t:                     mov sbuf,a

h1:                   jnb t1,h1

                         clr t1

                         ret

[vids]

@Mehtab Ali: hey thnks…vl try out dis 1

[anurudh tiwari]

the program for serial communication is given is only the tranfer data from microcontroller to the pc…..for the receiver the program is given elow

 

 

MOV TMOD,#20H 

MOV TH1,#-3 —9600 BAUD

MOV SCON ,#50H

SETBTR1

CLR RI

WAIT: JNB RI, WAIT

MOV A, SBUF

MOV P0,A  — TO SEND THIS IN PORT 0

---

 OR U CAN SORE ANY REGISTER OR MEMORY LOCATION…

END

[santhosh]

hi frinds

i hope somebody will help me to create my dream prject with microcontroler

 (water level indicator)

me now using analoge controls relays and transistors

discreption of my project

when water in tank is botom level motor will start

when water in tank on top level motor will stop

when motor started from bottom if inttrupted water flow motor will be stop

also low voltage or high voltage pevent to start motor

 

this my project now working well but pcb is big and very

hard work to create a pcb i think convert this project with microcontroler very easy to made

please help somebody idon’t know codes and how to transer

codes to micro controler which progamer need to use

waiting or repply

with best regards

 

[Lui Yat Ming]

Hi, I use Hyperterminal without c code in paper ‘ 

How to interface computer’s Serial Port (RS232) with 8051 microcontroller (AT89C51) ‘. I do not know why was that?

Please help!

Also I do not know the sentance in c code such as P1=value;&

P2=P1-32; It is for what ?

Thanks for an explanation.

 

For more explanation, the Hyperterminal also can type the ‘char’ and display exactly without c code in paper.  

[Author]

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