; Internal pullup enabled on P1.4.. Dang ; Texas Instruments Inc.
Trang 1; MSP430G2xx1 Demo - P1 Interrupt from LPM4 with Internal Pull-up
;
; Description: A hi/low transition on P1.4 will trigger P1_ISR which,
; toggles P1.0 Normal mode is LPM4 ~ 0.1uA
; Internal pullup enabled on P1.4
; ACLK = n/a, MCLK = SMCLK = default DCO
;
; MSP430G2xx1
;
-; /|\|
XIN|-; | | |
; |RST
XOUT|-; /|\ | R |
; o | P1.4-o P1.0| >LED
; \|/
;
; D Dang
; Texas Instruments Inc
; October 2010
; Built with Code Composer Essentials Version: 4.2.0
;******************************************************************************* .cdecls C,LIST, "msp430g2231.h"
.text ; Progam Start
; -RESET mov.w #0280h,SP ; Initialize stackpointer
StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT
SetupP1 mov.b #001h,&P1DIR ; P1.0 output, else input
mov.b #010h,&P1OUT ; P1.4 set, else reset
bis.b #010h,&P1REN ; P1.4 pullup
bis.b #010h,&P1IE ; P1.4 Interrupt enabled
bis.b #010h,&P1IES ; P1.4 hi/low edge
bic.b #010h,&P1IFG ; P1.4 IFG Cleared
;
Mainloop bis.w #LPM4+GIE,SR ; LPM4, enable interrupts
nop ; Required only for debugger
;
; -P1_ISR; Toggle P1.0 Output
xor.b #001h,&P1OUT ; P1.0 = toggle
bic.b #010h,&P1IFG ; P1.4 IFG Cleared
reti ; Return from ISR
;
; -; Interrupt Vectors
.sect ".reset" ; MSP430 RESET Vector
short RESET ;
sect ".int02" ; P1.x Vector
short P1_ISR ;
end