Topviewsimulator

SIMULATION A simulation is a representation of a situation with a similar but simpler model that can easily be manipulated to determine experimental results. Using a simulator can show the eventual real effects of a given situation. Top view Simulator Top view Simulator gives an excellent simulation environment for the Industry's most popular 8 bit microcontroller family, MCS 51. Device Selection

Main Window Once you select the microcontroller, the dialog box disappears leaving behind a blank screen with the Tool Bar and a Menu Bar. MENU BAR

Clear View Window Structure This is an optimized arrangement where windows are strategically placed in the display. Total display area of the monitor is divided into 5 windows. Windows meant for Program, Register, Internal Data Memory, External Data Memory and SFR Bit Status are placed in the Clear View.

Two LED’s in common anode configuration. LEDf for showing forward direction {P0.0} LEDb for showing reverse direction {P0.1} One 2lineX16 character LCD module. Data lines {P1} EN {P3.3} RW {P3.4} RS {P3.5} Stepper motor {P2}. Buzzer {P0.2}. INTERFACING

INTERFACING A SINGLE LED AT P1.0 AND FLASH IT AFTER A CERTAIN TIME DELAY

$MOD 51 LED EQU P1.0 ORG 0000H BACK: CLR LED ACALL DELAY SETB LED ACALL DELAY SETB LED ACALL DELAY SJMP BACK DELAY: MOV R1, #100 L3: MOV R2, #100 L2: MOV R3, #57 L1: DJNZ R2, L2 DJNZ R1, L3 RET END PROGRAM :::::::

INTERFACING A 2 line X 16 characters LCD 1 2 3 4 5 6 7 8 VSS VCC VEE RS RW EN D0 D1 9 10 11 12 13 14 15 16 D2 D3 D4 D5 D6 D7 LED+ LED-

Block diagram Micro Controller Data RAM Code RAM ROM Data Register Command Register BF CONT GND +VCC BK LED EN RS R/W D7-D0 RS=0 {COMMAND REG} RS=1 {DATA REG} RW=0 {WRITE} RW=1 {READ} EN=450 ns wide

COMMAND REGISTER PROGRAM FOR WRITING DATA $MOD51 LCD EQU P1 RS EQU P2.0 RW EQU P2.1 EN EQU P2.2 ORG 0000H MOV A, #38H ACALL COMMAND MOV A, #01H ACALL COMMAND MOV A, #80H ACALL COMMAND MOV A, #0EH ACALL COMMAND MOV A, #06H ACALL COMMAND MOV DPTR, #250H LOOP1: CLR A MOVC A, @A+DPTR ACALL DISPLAY ACALL DELAY INC DPTR SJMP LOOP1 COMMAND: MOV LCD, A CLR RS CLR RW SETB EN ACALL DELAY CLR EN RET DISPLAY: MOV LCD, A SETB RS CLR RW SETB EN ACALL DELAY CLR EN RET DELAY: MOV R0, #100 Q0: MOV R1, #100 Q1: MOV R2, #50 Q2: DJNZ R2, Q2 DJNZ R1, Q1 DJNZ R0, Q0 RET ORG 250H MYDATA: DB‘WELCOME TO ALL‘ ,0 END Command Code 01H 02H 04H 06H 05H 07H 08H 0AH OCH 0EH 0FH 10H 14H 18H 1CH 80H C0H 38H Description Clear display screen Return Home Decrement Cursor(shift cursor to left) Increment Cursor(shift cursor to right) Shift display right Shift display left Display off, cursor off Display off, cursor on Display on, cursor off Display on, cursor not blinking Display on, cursor blinking Shift cursor position to left Shift cursor position to right Shift the entire display to the left Shift the entire display to the right Force cursor to the beginning of 1 st line Force cursor to the beginning of 2 nd line 2 lines and 5*7 matrix

INTERFACING OF STEPPER MOTOR Stepper motor allow to control any motion with high precision by counting the number of steps applied to the motor. These are mainly of three types: Unipolar stepper motor Bipolar stepper motor Variable reluctance stepper motor

UNIPOLAR STEPPER MOTOR Unipolar stepper motors are characterized by their center-tapped windings . Speed= ………………………60……………………… No. STEPS/8*12/Fosc*0xFFFF*[0xFF-TH0] There are three ways of driving the motor. Full Step Mode Half Step Mode Half Step Sequence

Full Step Mode : Only one phase is kept on during the working of stepper PROGRAM FOR REVOLVING A Stepper Motor CONTINUOUSLY $MOD 51 ORG 0000H MOV A, #88H BACK: MOV P2, A RR A ACALL DELAY SJMP BACK DELAY: MOV R0,#255 MOV R1,#200 Q2: DJNZ R1, Q2 Q1: DJNZ R0, Q1 RET END

STEPPER MOTOR DRIVER {ULN2003} ■ Seven darlingtons per package ■ Output current 500 mA per driver (600 mA peak) ■ Output voltage 50 V this is done to drive the stepper motor by a proper amount of current.

PROGRAM TO DISPLAY 0-9:::: $MOD51 ORG 0000H B1: MOV P1, #0C0H ACALL DELAY MOV P1, #0F9H ACALL DELAY MOV P1, #0A4H ACALL DELAY MOV P1, #0B0H ACALL DELAY MOV P1, #99H ACALL DELAY MOV P1, #92H ACALL DELAY MOV P1, #82H ACALL DELAY MOV P1, #0F8H ACALL DELAY MOV P1, #80H ACALL DELAY MOV P1, #90H ACALL DELAY LJMP B1 DELAY: MOV R0, #100 L1: MOV R1, #100 L2: MOV R2, #57 L3: DJNZ R2, L3 DJNZ R1, L2 DJNZ R0, L1 RET A B C D E F H G COMMON ANODE 0 1 2 3 4 5 6 7 8 9 H G F E D C B A HEX VALUE 1 1 0 0 0 0 0 0 0C0 1 1 1 1 1 0 0 1 0F9 1 0 1 0 0 1 0 0 0A4 1 0 1 1 0 0 0 0 99 1 0 0 1 1 0 0 1 0B0 1 0 0 1 0 0 1 0 92 1 0 0 0 0 0 1 0 82 1 1 1 1 1 0 0 0 0F8 1 0 0 0 0 0 0 0 80 1 0 0 1 0 0 0 0 90

Topviewsimulator

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Topviewsimulator