msp430x24x_p1_01.s43

来自「步进电机驱动程序msp430f247单片机」· S43 代码 · 共 46 行

;******************************************************************************
;   MSP430x24x Demo - Software Poll P1.4, Set P1.0 if P1.4 = 1
;
;   Description: Poll P1.4 in a loop, if HI, P1.0 is set, if LOW, P1.0 reset.
;   ACLK = 32.768kHz, MCLK = SMCLK = default DCO
;
;                MSP430x249
;             -----------------
;         /|\|                 |
;          | |                 |
;          --|RST              |
;      /|\   |                 |
;       --o--|P1.4         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

StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
SetupP5     bis.b   #BIT0,&P1DIR            ; P1.0 output
                                            ;				          			
Mainloop    bit.b   #010h,&P1IN             ; P1.4 hi/low?
            jc      ON                      ; jmp--> P1.4 is set
                                            ;
OFF         bic.b   #BIT0,&P1OUT            ; P1.0 = 0 / LED OFF
            jmp     Mainloop                ;
ON          bis.b   #BIT0,&P1OUT            ; P1.0 = 1 / LED ON
            jmp     Mainloop                ;
                                            ;
;------------------------------------------------------------------------------
            COMMON  INTVEC                  ; Interrupt Vectors
;------------------------------------------------------------------------------
            ORG     RESET_VECTOR            ; MSP430 RESET Vector
            DW      RESET                   ;
            END