Embedded System Design

EMBEDDED SYSTEM DESIGN

LAB FILE

Rohit Sharma 05/ECE/145

INDEX

S. NO. EXPERIMENTS

1. Write an Assembly language Programme (ALP) to generate 10 kHz square wave for 8051. 2. Write an Assembly Language Program to generate a square wave of 10 KHz using timer register in 8051. 3. Write an Assembly Language Program to glow 8 LEDs one by one in serial order after a delay of 70ms. 4. To Study the Development Tools / Environment for Microcontroller Programme. 5. To write an ALP for DAC Embedded trainer for PIC 16f877 - module DAC. 6. To write an ALP to glow alternate LEDs using embedded trainer for PIC 16F877 - module even LEDs. 7. To write an ALP for PWM based speed control of motor using embedded trainer for PIC 16F877 - PWM controlled DCM at RC2. 8. To write an ALP for seven segment display using embedded trainer for PIC 16F877 – module seven segment display. 9. To write an ALP to control stepper motor using embedded trainer for PIC 16F877 – module stepper motor.

EXPERIMENT NO.1

AIM: Write an Assembly language Programme (ALP) to generate 10 kHz square wave for 8051 MAIN: SETB P1.0 LCALL DELAY CLR P1.0 LCALL DELAY SJMP MAIN DELAY: MOV R1, #10H NOP NOP NOP HERE: DJNZ R1, HERE RET Note: Address of P1.0 is 90H

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EXPERIMENT NO.2

AIM: Write an Assembly Language Program to generate a square wave of 10 KHz using timer register in 8051. MOV TMOD, #10H MAIN: MOV TL1, #0D2H MOV TH1, #0FFH SETB TR1 HERE: JNB TF1, HERE CLR TR1 CPL P1.0 CLR TF1 SJMP MAIN Note: Name of Register/Pin Address TMOD 89H TL1 8BH TH1 8DH TR1 8EH TF1 8FH P1.0 90H

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EXPERIMENT NO. 3

AIM: Write an Assembly Language Program to glow 8 LEDs one by one in serial order after a delay of 70ms. MAIN: MOV TMOD, #10H MOV TL1, #00H MOV TH1, #00H MOV A, #01 HERE: MOV P1, A LCALL DELAY RL A SJMP HERE DELAY: SETB TR1 LAB: JNB TF1, LAB CLR TR1 CLR TF1 RET

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EXPERIMENT NO. 4

AIM: To Study the Development Tools / Environment for Microcontroller Programme. THEORY: MPLAB IDE is a software program that runs on a PC to develop applications for Microchip microcontrollers. It is called an Integrated Development Environment, or IDE, because it provides a single integrated "environment" to develop code for an embedded microcontroller. An IDE combines all of the required diff. functions into a single program that will allow us to edit, assemble or compile, simulate, emulate, & program our application. The IDE is typically centered on the editor & uses the source code window to reference back syntax errors for the assembler & compilers & allow us to easily follow the exeecution of the program. Development tools used for microcontroller are:

INTEGRATED DEVELOPMENT SYSTEM

Figure 1) A List of an IDE System & Tools

SIMULATORS

ASSEMBLER & CROSS ASSEMBLER

EDITOR SIMULATOR LINKER

COMPILER

LOADER

EMULATORS TARGET SYSTEM PERFOR

LOGIC ANALYSER

EMULATOR: An Emulator is a piece of hardware that is placed into an application circuit to allow us to run &observe the operation of the application without going through the hassle of developing stimulus files. An emulator is an excellent tool for determining whether or not we have correctly modeled the hardware, the microcontroller interfaced to.

SIMULATOR: A Simulator is a program that simulates the microcontroller processor (& , optionally the hardware connected to it ) to allow us to watch the execution of our application to make sure it works properly before it is burned into acual hardware. The simulator is integrated into MPLAB IDE integrated development environment. It allows us to:

• modify object code and immediately re-execute it • inject external stimuli to the simulated processor • set pin and register values at prespecified intervals • trace the execution of the object code (MCU's only)

An INTERPRETER does expressaion by expression (line bu\yline) translation to the machine executable code. On thwe other hand , a COMPILER use the complete sets of the expression. It may also include the expressions from the library routines; i.e. standard tailor made program. While an interpreter helps in online execution on the codes, acompiler helps in the offline programming for obtaining the executable machine codes later. The C programs are used with an interpreter as well as with a compiler. A high level language is machine independent.It will have an expression like X=X+11, or X=2*Y+V*Z+23, etc. The C language needs a compiler. It is not executable using an interpreter. A tool is needed by the machine codes for a target system. The tool may be provided in C.

The word mnemonic is used instead of expression or statement while we program in the assembly language. A simulator has an assembler as an essential part of it. An assembly language has the mnemonics that are machine dependent. Example of a mnemonic is ADC A,0BH. It means an instruction that adds along with the previous carry the A register of the processor with the hexadecimal number 0B. An assembly mnemonic is specific to a microcontroller. It has different symbolic form on the different microcontrollers. It is as per the instructions provided in the instruction set. The assembly mnemonic needs an interpreter to translate into the machine codes that are executed on a specific microcontroller.

Using an EDITOR, the assembly language programmer writes the mnemonics. The keyboard of the PC is for entering the program. The Editor has the following features. It allows the entry, addition, deletion, insert, appending previously written lines or files, merging record and files at the specific positions, etc. A source file stores the edited file. It also has an appropriate name. The latter iis given by the programmer. An ASSEMBLER is a program that translates the assembly mnemonics into the binary opcodes and instructions i.e., into executable file, called object file. It also creates a list file that can be printed. The list file has address, source code (assembly language mnemonic), and object codes in hexadecimal. The object file has addresses that are to be adjusted during actual run of the assembly language program. A LOADER is a program that helps in the task by reallocating addresses before the opcodes & operands load in the computer memory. A LINKER linkes the needed object code files & library code files. This is before the loader reallocates the addresses in the memory, & the program runs on the computer. A DISSEMBLER translates the object codes into the mnemonics form of assembly

language. It helps in understanding the previously made object codes. A CROSS ASSEMBLER is useful to convert object codes for a microcontroller or processor to other codes for another microcontroller or processor & vice versa. Cross assemblers let us use a processor of the PC of the development system. It later on provides the object codes. These codes will actually be needed in the finally developed system that will use another processor or microcontroller.

RESULT: The Study of Development Tools / Environment for microcontroller programme is done successfully.

EXPERIMENT NO. 5

AIM: To write an ALP for DAC Embedded trainer for PIC 16f877 - module DAC. Date: Oct, 2008 LIST P=16F877A #INCLUDE "P16F877A.INC" ORG 0000H REG2: EQU 20H ORG 0000H GOTO START ORG 0004H RETFIE ORG 0005H START: BSF STATUS, RP0 BCF STATUS, RP1 MOVLW 00H MOVWF `TRISC MOVWF TRISD ; PORTC, PORTD AS OUTPUT PORTS BCF STATUS, RP0 CLRF PIR1 CLRF CCP1CON MOVLW 00H MOVWF REG2 ; INITIALIZE COUNTER START1:MOVF REG2,0 MOVWF PORTC ; OUT COUNTS ON DAC DATABUS BCF PORTD, 5 BSF PORTD, 5 INCF REG2, 1 ; INCREMENT COUNTER GOTO START1 END

;NAME:ROHIT SHARMA;ROLL NO.:05/ECE/145 ;ESD LAB.

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EXPERIMENT NO. 6

AIM: To write an ALP to glow alternate LEDs using embedded trainer for PIC 16F877 - module even LEDs Date: Nov, 2008 LIST P=16F877A INCLUDE "P16F877A.INC" ORG 0000H REG2: EQU 20H DLY2: EQU 21H DLY3: EQU 22H PTR: EQU 23H TEMP1: EQU 24H TEMP2: EQU 25H ORG 0000H GOTO START ORG 0004H RETFIE ORG 0005H START: BSF STATUS, RP0 BCF STATUS, RP1 MOVLW 00H MOVWF TRISC ; PORTC, PORTD AS OUTPUT PORTS MOVWF TRISD BCF STATUS, RP0 CLRF PIR1 CLRF CCP1CON START1: MOVLW 055H MOVWF PORTC MOVWF PORTD ; GLOW ALTERNATE LEDS CALL DELAY MOVLW 0AAH MOVWF PORTC MOVWF PORTD ; GLOW REMAINING LEDS CALL DELAY GOTO START1 DELAY: MOVLW 0B0H MOVWF DLY3 LOOP2: MOVLW 0FFH MOVWF DLY2 LOOP1: DECFSZ DLY2, 1 GOTO LOOP1 DECFSZ DLY3, 1 GOTO LOOP2 RETURN END ;NAME:ROHIT SHARMA;ROLLNO: 05/ECE/145;ESD LAB.

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EXPERIMENT NO.7

AIM: To write an ALP for PWM based speed control of motor using embedded trainer for PIC 16F877 - PWM controlled DCM at RC2 Date: Nov, 2008 LIST P=16F877A #INCLUDE "P16F877A.INC" ORG 0000H REG2: EQU 20H DLY2: EQU 21H DLY3: EQU 22H REG5: EQU 23H TEMP1: EQU 24H TEMP2: EQU 25H REG3: EQU 26H REG4: EQU 27H ADCON0 EQU 1FH ADCON1 EQU 9FH PIR1 EQU 0CH PIE1 EQU 8CH INTCON EQU 0BH ADRESH EQU 1EH ADRESL EQU 9EH ORG 0000H GOTO START ORG 0004H RETFIE ORG 0005H START: BCF STATUS,RP1 BSF STATUS,RP0 ;SET BANK-1 MOVLW 0FFH MOVWF TRISC ;PORTC INPUT PORTS BCF TRISC,2 ;SET RC2 AS PWM O/P BCF TRISC,0 ;SET RC0 AS RELAY O/P MOVLW 0FFH MOVWF PR2 ;SET PWM PERIOD BCF STATUS,RP0 ;SET BANK-0 BSF PORTC,0 ;SET RELAY AS ON MOVLW 07H MOVWF CCPR1L ;SET 8 BIT PWM DUTY CYCLE BCF CCP1CON,4 ;LSB1 BIT OF PWM DUTY CYCLE BCF CCP1CON,5 ;LSB0 BIT OF PWM DUTY CYCLE MOVLW 01H ;SET PWM FREQ FOR 3.83KHz MOVWF TMR2 ;SET TIMER PRESCALE VALUE AS ‘1’ MOVLW 04H MOVWF T2CON ;SET TIMER-2 ON

BSF CCP1CON,3 ;SET PWM MODE BSF CCP1CON,2 ;SET PWM MODE WAIT: GOTO WAIT END� ;TO RUN MOTOR CLOCKWISE OR ANTICLOCKWISE SET/RESET RCO BIT ;TO CHANGE THE SPEED OF MOTOR 06H DATA OUT AT CCPR1L FOR LOW ;SPEED & FFH DATA OUT AT CCPR1L FOR HIGH SPEED ;NAME: ROHIT SHARMA ;ROLL NO.: 05/ECE/145 ;ESD LAB.

OUTPUT

EXPERIMENT NO. 8

AIM: To write an ALP for seven segment display using embedded trainer for PIC 16F877 - module seven segment display. Date: Nov, 2008 LIST P=16F877A #INCLUDE "P16F877A.INC" ORG 0000H REG2: EQU 20H DLY2: EQU 21H DLY3: EQU 22H PTR: EQU 23H TEMP1: EQU 24H TEMP2: EQU 25H ORG 0000H GOTO START ORG 0004H RETFIE ORG 0005H START:BSF STATUS,RP0 BCF STATUS,RP1 MOVLW 00H ;PORTA,PORTB,PORTC,PORTD AS OUTPUT MOVWF TRISC MOVWF TRISD MOVWF TRISA MOVWF TRISB BCF STATUS,RP0 CLRF PIR1 CLRF CCP1CON MOVLW 0FFH MOVWF PORTC MOVWF PORTD INIT: MOVLW 0F9H MOVWF PORTC MOVLW 0F8H MOVWF PORTD ;DISPLAY I CALL DELAY MOVLW 92H MOVWF PORTC MOVLW 0F9H MOVWF PORTD ;DISPLAY S CALL DELAY MOVLW 8CH MOVWF PORTC MOVLW 0FAH MOVWF PORTD ;DISPLAY P CALL DELAY

MOVLW 87H MOVWF PORTC MOVLW 0FBH MOVWF PORTD ;DISPLAY t CALL DELAY MOVLW 0AFH MOVWF PORTC MOVLW 0FCH MOVWF PORTD ;DISPLAY r CALL DELAY MOVLW 0ABH MOVWF PORTC MOVLW 0FDH MOVWF PORTD ;DISPLAY n CALL DELAY GOTO INIT DELAY: MOVLW 4H MOVWF DLY3 LOOP2: MOVLW 0FFH MOVWF DLY2 LOOP1: DECFSZ DLY2,1 GOTO LOOP1 DECFSZ DLY3,1 GOTO LOOP2 RETURN END

;NAME: ROHIT SHARMA ;ROLLNO.: 05/ECE/145 ;ESD LAB.

OUTPUT

EXPERIMENT NO. 9

AIM: To write an ALP to control stepper motor using embedded trainer for PIC 16F877 - module stepper motor Date: Nov, 2008 ;CONNECTION DETAILS: ;ORANGE=A,BROWN=B,YELLOW=C,BLACK=D & RED=GND LIST P=16F877A #INCLUDE "P16F877A.INC" ORG 0000H REG2: EQU 20H DLY2: EQU 21H DLY3: EQU 22H PTR: EQU 23H TEMP1: EQU 24H TEMP2: EQU 25H ORG 0000H GOTO START ORG 0004H RETFIE ORG 0005H START: BSF STATUS,RP0 BCF STATUS,RP1 MOVLW 00H MOVWF TRISC ;PORTC,PORTD AS PUTPUT PORTS MOVWF TRISD BCF STATUS,RP0 CLRF PIR1 CLRF CCP1CON START1: MOVLW 05FH ;OUT 05 ON SPA,SPB,SPC,SPD MOVWF PORTC CALL DELAY MOVLW 6FH ;OUT 06 ON SPA,SPB,SPC,SPD MOVWF PORTC CALL DELAY MOVLW 0AFH ;OUT 0A ON SPA,SPB,SPC,SPD MOVWF PORTC CALL DELAY MOVLW 9FH ;OUT 09 ON SPA,SPB,SPC,SPD MOVWF PORTC CALL DELAY GOTO START1 DELAY: MOVLW 50H MOVWF DLY3 LOOP2: MOVLW 0FFH MOVWF DLY2 LOOP1: DECFSZ DLY2,1

GOTO LOOP1 DECFSZ DLY3,1 GOTO LOOP2 RETURN END�

;NAME: ROHIT SHARMA ;ROLL NO.: 05/ECE/145 ;ESD LAB.

OUTPUT