FLASHING OF LEDS USING PIC
AIM OF THE EXPERIMENT: To interface the LEDS to the PIC and blink LEDS continuously.
SOFTWARE
REQUIRED: MPLABX IDE 2.0
HARDWARE
REQUIRED: Computer System, PIC kit
COURSE OUTCOME/S:ETC/ECE
5.4.5: Design and
implement microcontroller based applications
OBJECTIVES (SKILL SET /
KNOWLEDGE TESTED / IMPARTED):
1.
The
main objective is to get familiar with the LED interfacing with PIC
2.
To
study the PIC kit
PROCEDURE:
§ Open MPLABX IDE 2.0
§ Go to File and Create a new Project
§ Select Microchip Embedded and then standalone Project and Click Next
§ Select the family as PIC18 Advanced 8-bit MCU
§ Select the Device PIC18F4550 àClick Next
§ Again click Next without selecting anything
§ Select mpasm and click Next
§ Give a project name and give location a folder in the E drive
§ Untick set as main project and click finish
§ Right click on source file, click New and select Assembler File.asm
§ Give the same file name as the project and click finish
§ Write the program and then click clean and build
§ If there is no errors it will show “Build Successful”
§ Go to Device manager to see which port is connected to the PIC kit
§ Go to PIC loader
§ In that select Programà Settingsà select COM port
§ Tick only Flash Program Memory
§ Press Reset on the PIC Loader Window
§ Press Rest on the kit
§ Then click Boot Loader mode à File àOpen
§ Select Project Folderàdistàdefaultà Productionà Select Hex file à open
§ Click on the “Write Device” Button
§ It will show “Write Complete” if the hex file is written
§ Press Reset
§ Go to File and Create a new Project
§ Select Microchip Embedded and then standalone Project and Click Next
§ Select the family as PIC18 Advanced 8-bit MCU
§ Select the Device PIC18F4550 àClick Next
§ Again click Next without selecting anything
§ Select mpasm and click Next
§ Give a project name and give location a folder in the E drive
§ Untick set as main project and click finish
§ Right click on source file, click New and select Assembler File.asm
§ Give the same file name as the project and click finish
§ Write the program and then click clean and build
§ If there is no errors it will show “Build Successful”
§ Go to Device manager to see which port is connected to the PIC kit
§ Go to PIC loader
§ In that select Programà Settingsà select COM port
§ Tick only Flash Program Memory
§ Press Reset on the PIC Loader Window
§ Press Rest on the kit
§ Then click Boot Loader mode à File àOpen
§ Select Project Folderàdistàdefaultà Productionà Select Hex file à open
§ Click on the “Write Device” Button
§ It will show “Write Complete” if the hex file is written
§ Press Reset
PROGRAM:
;
Switch Positions SW21:[1 2], SW22:[2 3]
PROCESSOR PIC18F4550
#include <p18f4550.inc>
Temp1 equ 0x26 ;
equate location 26H to temp1
Temp2 equ 0x27 ;
equate location 27H to temp2
Temp3 equ 0x28 ;
equate location 28H to temp3
ORG 0x800
GOTO START
START MOVLW 0x00
MOVWF TRISB ;
TRISB is the configuration register for PortB, where the LEDs are interfaced to
on the kit.
Loop1 MOVLW 0xAA
MOVWF LATB ;
LATB is the Output register for PortB
CALL
Delay1sec ; Call delay subroutine
MOVLW 0x55
MOVWF LATB
CALL
Delay1sec ; Call delay subroutine
GOTO Loop1
Delay1sec MOVLW .60 ; approx. 1sec delay
MOVWF Temp3
dela DECFSZ
Temp1,1 ; temp1 and temp2 are loaded
with maximum count of 00h and
decremented then to FFH to back to 00H
goto dela
DECFSZ
Temp2,1
goto dela
DECFSZ
Temp3,1
goto dela
RETURN
END
RESULT: LED blinking was observed on the PIC kit.
CONCLUSION: LED Program was successfully loaded and run on PIC
kit and LED blinking observed.
DRIVING A BUZZER USING PIC
AIM OF THE EXPERIMENT: To interface the Buzzer to the PIC and put it ON and OFF continuously.
SOFTWARE
REQUIRED: MPLABX IDE 2.0
HARDWARE
REQUIRED: Computer System, PIC kit
COURSE OUTCOME/S:ETC/ECE
5.4.5: Design and
implement microcontroller based applications
OBJECTIVES (SKILL SET /
KNOWLEDGE TESTED / IMPARTED):
1.
The
main objective is to get familiar with the buzzer interfacing with PIC
2.
To
study working of a buzzer
PROCEDURE:
§ Open MPLABX IDE 2.0
§ Go to File and Create a new Project
§ Select Microchip Embedded and then standalone Project and Click Next
§ Select the family as PIC18 Advanced 8-bit MCU
§ Select the Device PIC18F4550 àClick Next
§ Again click Next without selecting anything
§ Select mpasm and click Next
§ Give a project name and give location a folder in the E drive
§ Untick set as main project and click finish
§ Right click on source file, click New and select Assembler File.asm
§ Give the same file name as the project and click finish
§ Write the program and then click clean and build
§ If there is no errors it will show “Build Successful”
§ Go to Device manager to see which port is connected to the PIC kit
§ Go to PIC loader
§ In that select Programà Settingsà select COM port
§ Tick only Flash Program Memory
§ Press Reset on the PIC Loader Window
§ Press Rest on the kit
§ Then click Boot Loader mode à File àOpen
§ Select Project Folderàdistàdefaultà Productionà Select Hex file à open
§ Click on the “Write Device” Button
§ It will show “Write Complete” if the hex file is written
§ Press Reset
§ Go to File and Create a new Project
§ Select Microchip Embedded and then standalone Project and Click Next
§ Select the family as PIC18 Advanced 8-bit MCU
§ Select the Device PIC18F4550 àClick Next
§ Again click Next without selecting anything
§ Select mpasm and click Next
§ Give a project name and give location a folder in the E drive
§ Untick set as main project and click finish
§ Right click on source file, click New and select Assembler File.asm
§ Give the same file name as the project and click finish
§ Write the program and then click clean and build
§ If there is no errors it will show “Build Successful”
§ Go to Device manager to see which port is connected to the PIC kit
§ Go to PIC loader
§ In that select Programà Settingsà select COM port
§ Tick only Flash Program Memory
§ Press Reset on the PIC Loader Window
§ Press Rest on the kit
§ Then click Boot Loader mode à File àOpen
§ Select Project Folderàdistàdefaultà Productionà Select Hex file à open
§ Click on the “Write Device” Button
§ It will show “Write Complete” if the hex file is written
§ Press Reset
PROGRAM:
;
Switch Positions SW21:[1 2], SW22:[2 3]
PROCESSOR PIC18F4550
#include <p18f4550.inc>
Temp1 equ 0x26 ;
equate location 26H to temp1
Temp2 equ 0x27 ;
equate location 27H to temp2
Temp3 equ 0x28 ;
equate location 28H to temp3
ORG 0x800
GOTO START
START MOVLW 0x00
MOVWF TRISA ;
TRISA is the configuration register for PortA, where the relay is interfaced to
on the kit.
Loop1 MOVLW 0x20
MOVWF LATA ;
LATA is the Output register for PortA
CALL
Delay1sec ; Call delay subroutine
MOVLW 0x00
MOVWF LATA
CALL
Delay1sec ; Call delay subroutine
GOTO Loop1
Delay1sec MOVLW .60 ; approx. 1sec delay
MOVWF Temp3
dela DECFSZ Temp1,1
goto dela
DECFSZ
Temp2,1
goto dela
DECFSZ Temp3,1
goto dela
RETURN
END
RESULT: Buzzer Operation was observed on the PIC kit.
CONCLUSION: Buzzer Program was successfully loaded and run on
PIC kit and Buzzer operation observed.
