bin2bcd16.s43

msp430F437三相电表DEMO(编译器 IAR 3.42A）

//--------------------------------------------------------------------------
//
//  Software for MSP430 based e-meters.
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//	File: bin2bcd16.s43
//
//  Steve Underwood <[e-mail]>
//  Texas Instruments Hong Kong Ltd.
//
//  $Id$
//
//--------------------------------------------------------------------------
#include "io.h"

;void bin2bcd16(register uint8_t bcd[3], register uint16_t bin)
    public bin2bcd16

    RSEG CODE
bin2bcd16

#define i R8
#define decimal_0 R9
#define decimal_1 R10

#if defined(__MSP430_HAS_MSP430X_CPU__)
    pushm.w #3,R10
#else
    push.w  R8
    push.w  R9
    push.w  R10
#endif
    clr.w   decimal_0
    clr.w   decimal_1
    
    mov.w   #16,i
bin2bcd16_1
    rla.w   R14
    dadd.w  decimal_0,decimal_0
    dadd.w  decimal_1,decimal_1
    dec.w   i
    jnz     bin2bcd16_1
    mov.b   decimal_1,0(R12)
    mov.b   decimal_0,2(R12)
    swpb    decimal_0
    mov.b   decimal_0,1(R12)

#if defined(__MSP430_HAS_MSP430X_CPU__)
    popm.w  #3,R10
    reta
#else
    pop.w   R10
    pop.w   R9
    pop.w   R8
    ret
#endif
    end