pic16f628a experimentos

8/12/2019 PIC16F628A experimentos

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Experiment 1. Test Port A Bit 0 ON LED

First Experiment we will test Port RA by on RA0 that connect to LED the schematic for Experiment 1isshown below in Figure 1

Figure 1.1schematic for Experiment 1Test ON LED ON Port A Bit 0

Assemble circuit as figure 1.1 and load Programming to PIC16F628 after that on power supply youwill see result it


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Source Code For Experiment 1

;**********************************************************************;

; Filename: Experiment 1. Test Port A Bit 0 ON LED

;; www.electronics-microcontroller.com;;**********************************************************************

list p=16f628 ; list directive to defineprocessor

#include ; processor specific variabledefinitions

__CONFIG _CP_OFF & _WDT_OFF & _BODEN_ON & _PWRTE_ON & _XT_OSC &_MCLRE_ON & _LVP_OFF

org 0x000clrf PORTA ; Initial PORTAmovlw 0x07 ; Turn Comparator off andmovwf CMCON ; Enable pins for I/Obsf STATUS,RP0 ; Select Bank 1movlw b'11111110' ; All PORTA = Inputmovwf PORTA ; RA0 = Outputbcf STATUS,RP0 ; Return to Bank 0bcf PORTA,0 ; RA0 = 0 LED "ON"goto $

END ; end of program


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Experiment 2. Input & Output on Port A

The Experiment 2 we will test Port A is both Input and Output . Assemble circuit as figure 2.1 andDownload Program to PIC16F628

Figure 2.1schematic for Experiment 2 Input & Output on Port A

Assemble circuit as figure 2.1 and Download Programming to PIC16F628


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;**********************************************************************;

; Filename: Experiment 2. Input & Output on Port A;; www.electronics-microcontroller.com;;**********************************************************************



__CONFIG _CP_OFF & _WDT_OFF & _BODEN_ON & _PWRTE_ON & _XT_OSC &

_MCLRE_ON & _LVP_OFF

org 0x000clrf PORTA ; Initial PORTAmovlw 0x07 ; Turn Comparator off andmovwf CMCON ; Enable pins for I/Obsf STATUS,RP0 ; Select Bank 1movlw b'11111111' ; All PORTA = Inputmovwf PORTA ;bcf STATUS,RP0 ; Return to Bank 0btfsc PORTA,0 ; Test Switch Press ?goto $-1 ; If Not Press Loopbsf STATUS,RP0 ; If Press Set RA0 = Output

bcf PORTA,0 ; TRISAbcf STATUS,RP0 ; Return To Bank 0bcf PORTA,0 ; RA0 = 0 LED "ON"goto $

END ; end of program


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Experiment 3. Sound Generated

The Experiment 3 we will Generate sound (one frequency) by use PIC16F628. First of all see TimingDiagram as figure 3.1 for to understand

Figure 3.1Timing Diagram for Sound Generated

Assemble circuit as figure 3.2 and load Programming to PIC16F628

Figure 3.2schematic for Experiment 3 Sound Generated

Assemble circuit as figure 3.2 and load Program to PIC16F628 . RA4 Connect with PIEZO , TheFrequency can be calculate by formula as below

f = 1/ T1/(768 uSec + 768 uSec) = 651 Hz


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Experiment 4. Sound Melody

The previously experiment (Exp 3) we can Generated Sound at one frequency, for this experimentwe will apply Exp 3 to Generated Sound more one frequency like melody

Assemble circuit as figure 4.1 and Download Program to PIC16F628

Figure 4.1schematic for Experiment 4 Sound Melody

Assemble circuit as figure 4.1 and Download Program to PIC16F628


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;**********************************************************************;

; Filename: Experiment 4. Sound Generated




__CONFIG _CP_OFF & _WDT_OFF & _BODEN_ON & _PWRTE_ON & _XT_OSC &_MCLRE_ON & _LVP_OFF

COUNT equ 0x20SETTIME equ 0x21

org 0x000clrf PORTA ; Initial PORTA

; output data latchesmovlw 0x07 ; Turn Comparator off andmovwf CMCON ; Enable pins for I/Obsf STATUS,RP0 ; Select Bank 1movlw 0x0F ; RA0-RA3 =Input RA4 = Outputmovwf PORTA ;bcf STATUS,RP0 ; Return to Bank 0

LOOP1 bsf PORTA,4 ; Start Rising Pulsecall Delay ; Delaybcf PORTA,4 ; Falling Pulsecall Delaybtfsc PORTA,3 ; Test RA3 Pressgoto Check2 ; If No Continue Checkmovlw 0x20 ; If RA3 Press Set Time = 20Hmovwf SETTIMEgoto LOOP1 ; Continue

Check2 btfsc PORTA,1 ; Test RA1 Pressgoto Check1 ; If No Continue Checkmovlw 0x55 ; If RA1 Press

movwf TIME ; Set Time = 55Hgoto LOOP1 ; ContinueCheck1 btfsc PORTA,0 ; Test RA0 Press

goto LOOP1 ; If No Begin Pulse Againmovlw 0x60 ; If RA0 Pressmovwf TIME ; Set Time = 60Hgoto LOOP1 ; Begin Pulse Again

Delay movf TIME,w ; Delay Use Change Delay Timemovwf COUNT ; With TIME Registerdecfsz COUNT,fgoto $-1return

END ; of program


9/11

Experiment 5. Stepper Motor Drive

The Experiment 5 we will test Use PIC16F628 to Drive Stepper Motor, for Article & Types of SteppingMotors you and see links as Resources ,Tools & Related Menu below

This Experiment use Unipolar Motors 9-24 V 7.5 Degree/Step , and use IC ULN2003 for Drive

Unipolar Motors IC ULN2003

Figure 5.1schematic for Experiment 5 Stepper Motor Drive

Assemble circuit as figure 5.1 and Download Program to PIC16F628 from Figure 5.1 VR 100k use foradjust frequency clock of PIC16F628 when run in mode ER


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;**********************************************************************;

; Filename: Experiment 5. Stepper Motor Drive




__CONFIG _CP_OFF & _WDT_OFF & _BODEN_ON & _PWRTE_ON &_ER_OSC_NOCLKOUT & _MCLRE_ON & _LVP_OFF

COUNT equ 0x20DUMMY1 equ 0x21DUMMY2 equ 0x22

org 0x000 ; Reset Vetor Addressbsf STATUS,RP0 ; Set RB4-RB7 For Drive Stepper Motormovlw b'00001111'movwf PORTBbcf STATUS,RP0

Begin movlw .12 ; Loop 12 Time For 7.5 Degree/Step 4x12x7.5 =360

movwf COUNTLoop movlw b'00010000' ; 1 Phase Full Step

movwf PORTBcall Delay ; Change Delay For Change Speedmovlw b'00100000'movwf PORTBcall Delaymovlw b'01000000'movwf PORTBcall Delaymovlw b'10000000'movwf PORTB

call Delaydecfsz COUNT,f ; Check Loop = 12 Time ?goto Loop ; If Not Loop Again

movlw .12 ; Reverse Move 12 Timemovwf COUNT

Loop2 movlw b'01000000'movwf PORTBcall Delaymovlw b'00100000'movwf PORTBcall Delaymovlw b'00010000'

movwf PORTBcall Delay


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movlw b'10000000'movwf PORTBcall Delaydecfsz COUNT,f ; Check Loop = Time ?goto Loop2goto Begin ; If Yes Start Again

Delay movlw 0x20 ; Delay Between Stepmovwf DUMMY1

Delay1 clrf DUMMY2decfsz DUMMY2,fgoto $-1decfsz DUMMY1,fgoto Delay1return

END ; of program

pic16f628a experimentos

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