?? msp430x24x_compa_01.s43
字號:
;******************************************************************************
; MSP430x24x Demo - Comparator A, Poll input CA0, result in P1.0
;
; Description: The Voltage at pin CA0 (Vcompare) is compared with reference
; voltage of 0.5*Vcc. LED is toggled when Vcompare crosses the ref voltage.
;
; MSP430F249
; -----------------
; /|\| |
; | | |
; --|RST P2.3/CA0|<--Vcompare
; | |
; | P1.0|-->CAOUT - 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
mov.b #CAON+CAREF_2+CARSEL, &CACTL1 ; Enable Comp, ref = 0.5*Vcc
mov.b #P2CA0, &CACTL2 ; Pin to CA0
SetupP1 bis.b #BIT0,&P1DIR ; P1.0 = output direction
bis.b #BIT0,&P1SEL ; P1.0 = CAOUT
;-----------------------------------------------------------------------------
COMMON INTVEC ; Interrupt Vectors
;-----------------------------------------------------------------------------
ORG RESET_VECTOR ; RESET Vector
DW RESET ;
END
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