msp430x24x_wdt_04.s43

来自「步进电机驱动程序msp430f247单片机」· S43 代码 · 共 42 行

;*******************************************************************************
;   MSP430x24x Demo - WDT+ Failsafe Clock, DCO SMCLK
;
;   Description; Allow WDT+ in watchdog to timeout. Toggle P1.0 in main
;   function. LPM4 is entered, this example will demonstrate WDT+ feature
;   of preventing WDT+ clock to be disabled.
;   The WDT+ will not allow active WDT+ clock to be disabled by software, the
;   LED continues to Flash because the WDT times out normally even though
;   software has attempted to disable WDT+ clock source.
;   ACLK = n/a, MCLK = SMCLK = default DCO ~1.045MHz
;
;                MSP430F249
;             -----------------
;         /|\|              XIN|-
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;            |             P1.0|-->LED
;
;   B. Nisarga
;   Texas Instruments Inc.
;   September 2007
;   Built with IAR Embedded Workbench Version: 3.42A
;*******************************************************************************
#include "msp430x24x.h"
;-------------------------------------------------------------------------------
            RSEG    CSTACK                  ; Define stack segment
;-------------------------------------------------------------------------------
            RSEG    CODE                    ; Assemble to Flash memory
;-------------------------------------------------------------------------------
RESET       mov.w   #SFE(CSTACK),SP         ; Initialize stackpointer
SetupP1     bis.b   #001h,&P1DIR            ; P1.0 output
            xor.b   #001h,&P1OUT            ; Toggle P1.0
Mainloop    bis.w   #LPM4+GIE,SR            ; Disable all clocks
            nop                             ;
;-------------------------------------------------------------------------------
            COMMON  INTVEC                  ; Interrupt Vectors
;-------------------------------------------------------------------------------
            ORG     RESET_VECTOR            ; MSP430 RESET Vector
            DW      RESET                   ;
            END