fet210_wdt01.s43

110,120140,210,4 30,440 C语言,汇编源程序

;******************************************************************************
;   MSP-FET430x210 Demo - WDT Toggle P1.0 Interval overflow ISR, DCO SMCLK
;
;   Description; Toggle P1.0 using software timed by the WDT ISR. Toggle rate 
;   is approximately 30ms based on default ~ 800khz DCO/SMCLK clock source 
;   used in this example for the WDT.  
;   ACLK = n/a, MCLK = SMCLK = default DCO ~ 800k
;
;		 MSP430F2131
;             -----------------
;         /|\|              XIN|-  
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;            |             P1.0|-->LED
;
;   M.Buccini
;   Texas Instruments, Inc
;   October 2004
;******************************************************************************
#include  "msp430x21x1.h"
;------------------------------------------------------------------------------ 
            ORG     0F000h                  ; Program Start
;------------------------------------------------------------------------------ 
RESET       mov.w   #300h,SP                ; Initialize 'x2131 stackpointer
SetupWDT    mov.w   #WDT_MDLY_32,&WDTCTL    ; WDT ~30ms interval timer 
            bis.b   #WDTIE,&IE1             ; Enable WDT interrupt 
SetupP1     bis.b   #001h,&P1DIR            ; P1.0 output
                                            ;						  
Mainloop    bis.w   #CPUOFF+GIE,SR          ; CPU off, enable interrupts
            nop                             ; Required only for debugger
                                            ;
;------------------------------------------------------------------------------ 
WDT_ISR;    Toggle P1.0
;------------------------------------------------------------------------------ 
            xor.b   #001h,&P1OUT            ; Toggle P1.0
            reti                            ;		 
                                            ;
;------------------------------------------------------------------------------ 
;           Interrupt Vectors Used MSP430x21x1         
;------------------------------------------------------------------------------ 
            ORG     0FFFEh                  ; MSP430 RESET Vector
            DW      RESET                   ; 
            ORG     0FFF4h                  ; WDT Vector
            DW      WDT_ISR                 ; 
            END