Maxq family user’s guide: maxq2010 supplement – Maxim Integrated MAXQ Family Users Guide: MAXQ2010 Supplement User Manual

Page 53

MAXQ Family User’s Guide:

MAXQ2010 Supplement

6-15

6.2.3 External Interrupt Example: Handling Interrupt on INT10/P5.2

move PD5.2, #0

; Set P5.2 to input mode

move PO5.2, #1

; Enable weak pullup

move IV, #intHandler

; Set interrupt vector

move IMR.1, #1

; Enable interrupts for module 1

move EIE1.2, #1

; Enable external interrupt 10

move EIES1.2, #1

; Set INT10 to trigger on falling edge

move EIF1.2, #0

; Force interrupt flag cleared

nop

nop
move IC.0, #1

; Enable interrupts globally

sjump $

; Wait for int to trigger (press SW3)

intHandler:

move EIF1.2, #0

; Clear interrupt flag

nop

; [SET BREAKPOINT HERE]

nop

reti