Toggle rate is ; exactly 250ms based on 32kHz ACLK WDT clock source.. Dang ; Texas Instruments Inc.
Trang 1; MSP320G2xx2 Demo - WDT, Toggle P1.0, Interval Overflow ISR, 32kHz ACLK
;
; Description: Toggle P1.0 using software timed by WDT ISR Toggle rate is
; exactly 250ms based on 32kHz ACLK WDT clock source In this example the
; WDT is configured to divide 32768 watch-crystal(2^15) by 2^13 with an ISR
; triggered @ 4Hz
; ACLK = LFXT1 = 32768Hz, MCLK = SMCLK = DCO
; //* External watch crystal installed on XIN XOUT is required for ACLK *//
;
; MSP430G2xx2
;
-; /|\|
XIN|-; | | | 32kHz
; |RST
XOUT|-; | |
; | P1.0| >LED
;
; D Dang
; Texas Instruments Inc
; December 2010
; Built with Code Composer Essentials Version: 4.2.0
;******************************************************************************* .cdecls C,LIST, "msp430g2452.h"
.text ; Program Start
; -RESET mov.w #0280h,SP ; Initialize stackpointer
Setup mov.w #WDT_ADLY_250,&WDTCTL ; WDT 250ms, ACLK, interval timer bis.b #WDTIE,&IE1 ; Enable WDT interrupt
SetupP1 bis.b #001h,&P1DIR ; P1.0 output
;
Mainloop bis.w #LPM3+GIE,SR ; Enter LPM3, interrupts enabled nop ; Required only for debugger
;
; -WDT_ISR; Toggle P1.0
xor.b #001h,&P1OUT ; Toggle P1.0
reti ;
;
; -; Interrupt Vectors
.sect ".reset" ; MSP430 RESET Vector
short RESET ;
sect ".int10" ; WDT Vector
short WDT_ISR ;
end