slopad.s43

MSP430F413的SlopAD代码

/******************************************************************************/
//File:SlopAD.s43
/*****************************************************************************/

#include  "msp430x41x.h"

NAME SlopeAD

;====================================================
;                  SlopeAD
;====================================================
PUBLIC      SlopeAD                                     ; Declare symbol to be exported
RSEG        CODE                                        ; Code is relocated

SlopeAD
            bis.b   #02h,&P2OUT
            mov     #04096,R15                          ; Integrate 1-bit DAC 4096 COUNTS
            mov     #00h,R14;


Pre_DisC    bic.b   #02h,&P2OUT                         ; Pre_Discharge to the voltage

            dec     R15                                 ;
            jz      MEAS_OVER

            bit.b   #CAOUT,&CACTL2                      ;
            jz     Pre_DisC                             ;


Pre_C       bis.b   #02h,&P2OUT                         ; Pre_charge to the voltage
            bit.b   #CAOUT,&CACTL2                      ;
            jnz     Pre_C                               ;

            mov     #04096,R15

Pluse       bit.b   #CAOUT,&CACTL2
            jnc     High1
Low1        bis.b   #02h,&P2OUT                         ; charge
            nop                                         ; charge circle=discharge circle
            dec     R15
            jnz     Pluse
            jmp     MEAS_OVER
High1       bic.b   #02h,&P2OUT                         ; discharge
            inc     R14                                 ;
            dec     R15                                 ;
            jnz     Pluse
MEAS_OVER   mov     R14,R12                             ; return the result
            bic.b   #02h,&P2OUT

Ret

END