KHAWAJA ABDUL SAMAD
FA19-EEE-006
COMSATS University Islamabad, Abbottabad
Campus
Department of Electrical & Computer Engineering
Laboratory Report
Microprocessor Systems and Interfacing
CPE-342
KHAWAJA ABDUL SAMD
FA19-EEE-006
6R
KHAWAJA ABDUL SAMAD
FA19-EEE-006
LAB:8
Question1. Generate a rectangular wave with PIC18F452 microcontroller with following
requirements.
i. Frequency= 200Hz, Duty Cycle =20% & XTAL =20 MHz ii. Frequency= 50Hz,
Duty Cycle =25% & XTAL =40 MHz iii. Frequency=1Hz, Duty Cycle =50% &
XTAL =40 MHz iv. Frequency=4Hz, Duty Cycle =25% & XTAL =20 MHz
Code
i. Frequency= 200Hz, Duty Cycle =20% & XTAL =20 MHz
#INCLUDE <P18F452.INC>
LIST P=PIC18F452, F=INHX32, N=0, ST=OFF, R=HEX config OSC=HS, OSCS=OFF, WDT=OFF, BORV=45,
PWRT=ON, BOR=ON, DEBUG=OFF, LVP=OFF, STVR=OFF
ORG 0x2A
BCF TRISC, 0
AGAIN
BSF PORTC, 0
CALL X1
BCF PORTC,0
CALL X1
CALL X1
CALL X1
CALL X1
BRA AGAIN
X1
MOVLW B'00001000'
MOVWF T0CON
MOVLW H'EC'
MOVWF TMR0H
MOVLW 76H
KHAWAJA ABDUL SAMAD
MOVWF TMR0L
BCF INTCON, TMR0IF
BSF T0CON, TMR0ON
XYZ
BTFSS INTCON,TMR0IF
BRA XYZ
BCF T0CON, TMR0ON
RETURN
END
Screenshot
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Output
ii. Frequency= 50Hz, Duty Cycle =25% & XTAL =40 MHz
Code
#INCLUDE <P18F452.INC>
LIST P=PIC18F452, F=INHX32, N=0, ST=OFF, R=HEX config OSC=HS, OSCS=OFF, WDT=OFF, BORV=45,
PWRT=ON, BOR=ON, DEBUG=OFF, LVP=OFF, STVR=OFF
ORG 0x2A
BCF TRISC, 0
AGAIN
BSF PORTC, 0
CALL X1
BCF PORTC,0
CALL X1
CALL X1
CALL X1
BRA AGAIN
X1
MOVLW B'00001000'
MOVWF T0CON
MOVLW H'3C'
MOVWF TMR0H
MOVLW H'B0'
MOVWF TMR0L
BCF INTCON, TMR0IF
FA19-EEE-006
KHAWAJA ABDUL SAMAD
BSF T0CON, TMR0ON
XYZ
BTFSS INTCON, TMR0IF
BRA XYZ
BCF T0CON, TMR0ON
RETURN
END
Screenshot
Output
FA19-EEE-006
KHAWAJA ABDUL SAMAD
FA19-EEE-006
iii. Frequency=1Hz, Duty Cycle =50% & XTAL =40 MHz
Code
#INCLUDE <P18F452.INC>
LIST P=PIC18F452, F=INHX32, N=0, ST=OFF, R=HEX config OSC=HS, OSCS=OFF, WDT=OFF, BORV=45,
PWRT=ON, BOR=ON, DEBUG=OFF, LVP=OFF, STVR=OFF
ORG 0X2A
BCF TRISC,0
AGAIN
BSF PORTC,0
CALL D1
BCF PORTC,0
CALL D1
BRA AGAIN
D1
MOVLW B'00000110'
MOVWF T0CON
MOVLW H'67'
MOVWF TMR0H
MOVLW H'69'
MOVWF TMR0L
BCF INTCON,TMR0IF
BSF T0CON,TMR0ON .
ABC
BTFSS INTCON,TMR0IF
BRA ABC
BCF T0CON,TMR0ON
RETURN
END
KHAWAJA ABDUL SAMAD
Screenshot
Output
FA19-EEE-006
KHAWAJA ABDUL SAMAD
iv. Frequency=4Hz, Duty Cycle =25% & XTAL =20 MHz
Code
#INCLUDE <P18F452.INC>
LIST P=PIC18F452, F=INHX32, N=0, ST=OFF, R=HEX config OSC=HS, OSCS=OFF, WDT=OFF, BORV=45,
PWRT=ON, BOR=ON, DEBUG=OFF, LVP=OFF, STVR=OFF
ORG 0x2A
BCF TRISC, 0
AGAIN
BSF PORTC, 0
CALL X1
BCF PORTC,0
CALL X1
CALL X1
CALL X1
BRA AGAIN
X1
MOVLW B'00000101'
MOVWF T0CON
MOVLW H'EC'
MOVWF TMR0H
MOVLW H'EB'
MOVWF TMR0L
BCF INTCON, TMR0IF
BSF T0CON, TMR0ON
XYZ
BTFSS INTCON, TMR0IF
BRA XYZ
BCF T0CON, TMR0ON
RETURN
END
FA19-EEE-006
KHAWAJA ABDUL SAMAD
Screenshot
Output
FA19-EEE-006
KHAWAJA ABDUL SAMAD
Fill the Following table from above programs
FA19-EEE-006
KHAWAJA ABDUL SAMAD
FA19-EEE-006
Question2 Implement a RADAR System using PIC18F452. Radar system uses a listening
sensor and listens for high value from sensor. Once it detects high value from sensor it
will generate a pulse with duration of 300ms. Use XTAL=24 MHz with PIC18F452.
Code
#INCLUDE P18F452.INC
LIST P=PIC18F452, F=INHX32, N=0, ST=OFF, R=HEX config OSC=HS, OSCS=OFF, WDT=OFF, BORV=45,
PWRT=ON, BOR=ON, DEBUG=OFF, LVP=OFF, STVR=OFF
ORG 2AH
BCF TRISC, RC0
MOVLW 04H
MOVWF T0CON
AGAIN
MOVLW 24H
MOVWF TMR0H
MOVLW 47H
MOVWF TMR0L
BCF INTCON,TMR0IF
SENSORCHECK
BTFSS PORTB,RB0
BRA SENSORCHECK
BSF PORTC,RC0
BSF T0CON,TMR0ON
ROLLOVERCHECK
BTFSS INTCON,TMR0IF
BRA ROLLOVERCHECK
BCF T0CON,TMR0ON
BCF PORTC,RC0
KHAWAJA ABDUL SAMAD
BRA AGAIN
END
Screenshot
FA19-EEE-006
KHAWAJA ABDUL SAMAD
Output
FA19-EEE-006
Laboratory Assessment
Criteria
Allocated
Marks
Psychomotor
(evaluated during the
experiment)
60%
Criteria
Allocated
Marks
Affective
(Evaluated during
the Lab)
Criteria
Cognitive
(evaluated on report
submission)
Learning Level
Poor
Good
Very
Good
Excellent
40%
50-60%
70-80%
90-100%
Learning Level
Poor
Good
Very
Good
Excellent
40%
50-60%
70-80%
90-100%
Obtained
Marks
(A)
10%
Allocated
Marks
Learning Level
Poor
Good
Very
Good
Excellent
40%
50-60%
70-80%
90-100%
30%
Obtained Marks= (0.6 × P) + (0.1 × A) + (0.3 × C) =
Course Instructor:
Obtained
Marks
(P)
: Total Marks:
Obtained
Marks
(C)