lab-01.s43

MSP430F2013是TI的U盘开发工具对IO进行处理的ASM源程序包

;*******************************************************************************
;   MSP430F20xx Demo - Software Toggle P1.0
;
;   Description: Toggle P1.0 by xor'ing P1.0 inside of a software loop.
;   ACLK = n/a, MCLK = SMCLK = default DCO
;
;                MSP430F20xx
;             -----------------
;         /|\|              XIN|-
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;            |             P1.0|-->LED
;
;   M. Buccini / L. Westlund
;   Texas Instruments Inc.
;   October 2005
;   Built with IAR Embedded Workbench Version: 3.40A
;*******************************************************************************
#include  "msp430x20x3.h"
;-------------------------------------------------------------------------------

            ORG     0F800h                  ; 
;-------------------------------------------------------------------------------
RESET       mov.w   #0280h,SP               ; 初始化堆栈
;-------------------------------------------------------------------------------
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; 关看门狗
SetupPx     bis.b   #001h,&P1DIR            ; P1.0输出方向
Mainloop    xor.b   #001h,&P1OUT            ; 翻转 P1.0
;-------------------------------------------------------------------------------
Wait        mov.w   #050000,R15             ; 延时
L1          dec.w   R15                     ; R15 减 1
            jnz     L1                      ; 延时结束 ？
            jmp     Mainloop                ; 循环
;-------------------------------------------------------------------------------
            ORG     0FFFEh                  ;  
            DW      RESET                   ;
            END