fet120_adc10_01.s43

110,120140,210,4 30,440 C语言,汇编源程序

;******************************************************************************
;   MSP-FET430P120 Demo - ADC10 Sample A0, AVcc Set P1.0 if A0 > 0.5*AVcc 
;
;   Description; A single sample is made on A0 with reference to AVcc.  
;   Software sets ADC10SC to start sample and conversion - ADC10SC 
;   automatically cleared at EOC. ADC10 internal oscillator times sample (16x) 
;   and conversion. In Mainloop MSP430 waits in LPM0 to save power until ADC10
;   conversion complete, ADC10_ISR will force exit from any LPMx in Mainloop on
;   reti. If A0 > 0.5*AVcc, P1.0 set, else reset. 
;   //*MSP430F1232 or MSP430F1132 Device Required*//
;
;                MSP430F1232
;             -----------------
;         /|\|              XIN|-  
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;        >---|A0           P1.0|--> LED
;
;   M.Buccini
;   Texas Instruments, Inc
;   January 2004
;******************************************************************************
#include  "msp430x12x2.h"
;------------------------------------------------------------------------------ 
            ORG     0E000h                  ; Program Start
;------------------------------------------------------------------------------ 
RESET       mov.w   #0300h,SP               ; Initialize stackpointer
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
SetupADC10  mov.w   #ADC10SHT_2+ADC10ON+ADC10IE,&ADC10CTL0 ; 16x, enable int.
            bis.b   #01h,&ADC10AE           ; P2.0 ADC10 option select 
SetupP1     bis.b   #001h,&P1DIR            ; P1.0 output
                                            ;
Mainloop    bis.w   #ENC+ADC10SC,&ADC10CTL0 ; Start sampling/conversion
            bis.w   #CPUOFF+GIE,SR          ; LPM0, ADC10_ISR will force exit
            bic.b   #01h,&P1OUT             ; P1.0 = 0
            cmp.w   #01FFh,&ADC10MEM        ; ADC10MEM = A0 > 0.5AVcc?
            jlo     Mainloop                ; Again
            bis.b   #01h,&P1OUT             ; P1.0 = 1
            jmp     Mainloop                ; Again
                                            ;
;------------------------------------------------------------------------------ 
ADC10_ISR;  Exit any LPMx on reti 
;------------------------------------------------------------------------------ 
            mov.w   #GIE,0(SP)              ; Exit any LPMx on reti
            reti                            ;		 
                                            ;
;------------------------------------------------------------------------------ 
;           Interrupt Vectors Used MSP430x12x2         
;------------------------------------------------------------------------------ 
            ORG     0FFFEh                  ; MSP430 RESET Vector
            DW      RESET                   ; 
            ORG     0FFEAh                  ; ADC10 Vector
            DW      ADC10_ISR               ; 
            END