fet140_svs01.s43

基于IAR Workbench for MSP430 的汇编语言例程

;******************************************************************************
;   MSP-FET430P140 Demo - SVS POR @ 2.5V VCC
;
;   Description; The SVS POR feature is used to disable normal operation that 
;   toggles P1.0 by xor'ing P1.0 inside of a software loop.
;   In the example, when VCC is above 2.5V, the MSP430 toggles P1.0. When VCC is
;   below 2.5V, the SVS resets the MSP430, and no toggle is seen.
;   ACLK= n/a, MCLK= SMCLK= default DCO ~ 800k
;   //*MSP430F169 Device Required*//
; 
;                 MSP430F169
;              -----------------
;          /|\|              XIN|-  
;           | |                 |
;           --|RST          XOUT|-
;             |                 |
;             |             P1.0|-->LED
; 
;   M. Buccini
;   Texas Instruments, Inc
;   March 2004
;   Updated for IAR Embedded Workbench Version: 2.21B
;******************************************************************************
#include  "msp430x16x.h"
;------------------------------------------------------------------------------ 
            ORG     01100h                  ; Progam Start 
;------------------------------------------------------------------------------ 
RESET       mov.w   #0A00h,SP               ; Initialize 'x1x9 stackpointer
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
SetupP1     bis.b   #001h,&P1DIR            ; P1.0  output
            mov.b   #060h+PORON,&SVSCTL     ; SVS POR enabled @ 2.5V  
                                            ;                                                     
Mainloop    mov.w   #050000,R15             ; Delay to R15
L1          dec.w   R15                     ; Decrement R15
            jnz     L1                      ; Delay over?
            xor.b   #001h,&P1OUT            ; Toggle P1.0
            jmp     Mainloop                ; Again
                                            ;
;------------------------------------------------------------------------------ 
;           Interrupt Vectors Used MSP430x13x/14x/15x/16x         
;------------------------------------------------------------------------------ 
            ORG     0FFFEh                  ; MSP430 RESET Vector
            DW      RESET                   ; 
            END