PREKIDI (INTERAPTI) Memorijska organizacija

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Published 2026-09-04 · 15 slides · 0 views

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PREKIDI (INTERAPTI) Memorijska organizacija

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Description

PREKIDI (INTERAPTI) Memorijska organizacija Prekidi Loop bsf PORTB, 7 call Delay500 bcf PORTB, 7 call Delay500 goto Loop Delay500 clrf delayL clrf delayM movlw d3 movwf delayH Label decfsz delayL goto Label decfsz delayM goto Label decfsz

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PREKIDI(INTERAPTI)

Memorijska organizacija

Prekidi Loop
bsf PORTB, 7
call Delay500
bcf PORTB, 7
call Delay500
goto Loop
Delay500
clrf delayL
clrf delayM
movlw d'3'
movwf delayH
Label
decfsz delayL
goto Label
decfsz delayM
goto Label
decfsz delayH
goto Label
return
end

Izvori prekida Promena logičkog stanja na nožici RB0
Prekoračenje slobodnog brojača TMR0
Završetak ciklusa upisa u EEPROM
Promena na jednoj od nožica RB4-RB7

Prekidi – način rada

Prekidi – INTCON registar

Prekid na RB0

OPTION REGISTAR bit 7:
RBPU: PORTB Pull-up Enable bit0 = PORTB pull-ups are disabled1 = PORTB pull-ups are enabled (by individual port latch values).
bit 6
INTEDG: Interrupt Edge Select bit1 = Interrupt on rising edge of RB0/INT pin0 = Interrupt on falling edge of RB0/INT pin

Prekid na RB0 PROCESSOR 16F84
#include "p16f84.inc"
__CONFIG _XT_OSC & _PWRTE_ON & _WDT_OFF & _CP_OFF
org 0x00
goto main
org 0x04
goto ISR
main
bsf STATUS, RP0
movlw b'00000001'
movwf TRISB
bcf OPTION_REG, INTEDG
bsf OPTION_REG, NOT_RBPU
bcf STATUS, RP0
clrf PORTB
bsf PORTB, 7
bsf INTCON, INTE
bsf INTCON, GIE

Prekid na RB0 Loop
goto Loop

ISR
bcf INTCON, INTF
btfss PORTB,7
goto Lab1
bcf PORTB,7
retfie

Lab1
bsf PORTB,7
retfie

end

EEPROM MEMORIJA

EEPROM MEMORIJA bit 0 RD (Read Control bit)
1=initializes reading
0=does not initialize reading bit 1 WR (Write Control bit)
1=initializes writing
0=does not initialize writing bit 2 WREN (EEPROM Write Enable bit) Enables writing to EEPROM
1=writing allowed
0=writing disallowed bit 3 WRERR (EEPROM Error Flag bit) Error during writing to EEPROM
1=error occured
0=error did not occur bit 4 EEIF (EEPROM Write Operation Interrupt Flag bit) Bit used to inform that writing data to EEPROM has ended.
1=writing terminated
0=writing not terminated yet, or has not started

EEPROM MEMORIJA EEPROM read

EEPROM MEMORIJA EEPROM write

Get digits

PREKIDI (INTERAPTI) Memorijska organizacija

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