fet430_wdt01.s43

德州仪器(TI) 的超低功耗16 位RISC 混合信号处理器的MSP430 平台为电池供电的测量应用提供了最终解决方案。应用包括便携式医疗设备、低功耗工业操作、无线、实用计量等

;******************************************************************************
;   MSP-FET430P430 Demo - WDT Toggle P5.1 Interval overflow ISR, DCO SMCLK
;
;   Description; Toggle P5.1 using software timed by the WDT ISR. Toggle rate 
;   is approximately 31ms based on default ~ 1.048MHz DCO/SMCLK clock source 
;   used in this example for the WDT.  
;   ACLK = n/a, MCLK = SMCLK = default DCO ~ 1.048MHz
;
;                 MSP430FG439
;             -----------------
;         /|\|              XIN|-  
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;            |             P5.1|-->LED
;
;   M.Buccini
;   Texas Instruments, Inc
;   June 2004
;******************************************************************************
#include  "msp430xG43x.h"
;------------------------------------------------------------------------------ 
            ORG     01100h                  ; Program Start
;------------------------------------------------------------------------------ 
RESET       mov.w   #0A00h,SP               ; Initialize stack pointer
SetupWDT    mov.w   #WDT_MDLY_32,&WDTCTL    ; WDT ~31ms interval timer 
            bis.b   #WDTIE,&IE1             ; Enable WDT interrupt 
SetupP5     bis.b   #002h,&P5DIR            ; P5.1 output
                                            ;						  
Mainloop    bis.w   #CPUOFF+GIE,SR          ; Enter LPM0, enable interrupts
            nop                             ; Required only for debugger
                                            ;
;------------------------------------------------------------------------------
WDT_ISR;    Toggle P5.1
;------------------------------------------------------------------------------
            xor.b   #002h,&P5OUT            ; Toggle P5.1
            reti                            ;		 
                                            ;   
;----------------------------------------------------------------------------- 
;           Interrupt Vectors Used MSP430x4xx          
;----------------------------------------------------------------------------- 
            ORG     0FFFEh                  ; MSP430 RESET Vector
            DW      RESET                   ; 
            ORG     0FFF4h                  ; WDT Vector
            DW      WDT_ISR                 ; 
            END