Showing posts with label Serial Communication. Show all posts
Serial communication software
Pc to lcd communication:
ORG 00H
RS EQU P3.4
RW EQU P3.5
EN EQU P3.7
DATAPORT EQU P1
MAIN:
MOV TMOD,#20H
MOV TH1,#0FDH
MOV SCON,#50H
ACALL LCD_INIT
SETB TR1 ;start timer1
ACALL SERIAL
SERIAL:
HERE2: JNB RI,HERE2 ;Wait for character to come in
MOV A,SBUF ; move recevied data into a
CLR RI
ACALL DATA_WRT
ACALL DELAY
SJMP SERIAL
LCD_INIT:
MOV A,#38H
LCALL COMND_WRT
ACALL DELAY
MOV A,#0EH
LCALL COMND_WRT
ACALL DELAY
MOV A,#01H
LCALL COMND_WRT
ACALL DELAY
MOV A,#06H
LCALL COMND_WRT
ACALL DELAY
MOV A,#80H
LCALL COMND_WRT
ACALL DELAY
;CJNE A,#8FH,AA
;;AA: MOV A,#0C0H
; LCALL COMND_WRT
; ACALL DELAY
RET
COMND_WRT:
MOV DATAPORT,A
CLR RS
CLR RW
SETB EN
ACALL DELAY
CLR EN
RET
DATA_WRT:
MOV DATAPORT,A
SETB RS
CLR RW
SETB EN
ACALL DELAY
CLR EN
RET
LCD_CLEAR:
MOV DATAPORT,#01H
ACALL COMND_WRT
RET
DELAY:
MOV R0,#0FFH
HERE1: MOV R1,#0FFH
HERE: DJNZ R1,HERE
DJNZ R0,HERE1
RET
Tag :
RS232,
Serial Communication
RS 232 serial communication with microcontroller using ftdi usb serial adapter
rs232 communication is also possible with microcontroller so that microcontroller is able to communicate with pc using ftdi usb serial adapter. Data is transferred serially so that it is known as serial communication.
I have implemented this circuit on proteus as well as on hardware. It is very simple and easy to implement. You should buy usb to serial adapter for implementing this project and a software like flash magic or hyper terminal. After connecting hyper terminal or flashmagic to appropriate COM port. type the word from your pc keypad. It will be then displayed on LCD.
Tag :
RS232,
Serial Communication