bin2bcd32.c

MSP430 examples or customized

//--------------------------------------------------------------------------
//
//  Software for MSP430 based e-meters.
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//	File: bin2bcd32.c
//
//  Steve Underwood <[e-mail]>
//  Texas Instruments Hong Kong Ltd.
//
//  Date        Comments
//  =====================
//	2002-09-16	Initial version
//
//--------------------------------------------------------------------------
#include <stdint.h>
#include <stdio.h>
//#include "emeter-toolkit-custom.h"
#include "emeter-toolkit.h"

void bin2bcd32(register uint8_t bcd[5], register uint32_t bin)
{
#if defined(__GNUC__)  &&  defined(__MSP430__)
	register int i;
	register uint16_t decimal_0;
	register uint16_t decimal_1;
	register uint16_t decimal_2;

	i = 16;
	decimal_0 =
	decimal_1 =
	decimal_2 = 0;
	__asm__ __volatile__(
        "1: \n"
        " rla   %B4 \n"
        " dadd  %[decimal_0],%[decimal_0] \n"
        " dadd  %[decimal_1],%[decimal_1] \n"
        " dadd  %[decimal_2],%[decimal_2] \n"
        " dec   %[i] \n"
        " jnz   1b \n"
   		" mov	#16,%[i] \n"
        "2: \n"
        " rla   %A[bin] \n"
        " dadd  %[decimal_0],%[decimal_0] \n"
        " dadd  %[decimal_1],%[decimal_1] \n"
        " dadd  %[decimal_2],%[decimal_2] \n"
        " dec   %[i] \n"
        " jnz   2b \n"
        " mov.b %[decimal_2],0(%[bcd]) \n"
   	    " mov.b %[decimal_1],2(%[bcd]) \n"
   	    " swpb  %[decimal_1] \n"
   	    " mov.b %[decimal_1],1(%[bcd]) \n"
        " mov.b %[decimal_0],4(%[bcd]) \n"
   	    " swpb  %[decimal_0] \n"
   	    " mov.b %[decimal_0],3(%[bcd]) \n"
        : [bcd] "+r"(bcd), [decimal_0] "+r"(decimal_0), [decimal_1] "+r"(decimal_1), [decimal_2] "+r"(decimal_2)
        : [bin] "r"(bin), [i] "r"(i));
#elif defined(__AQCOMPILER__)
	register int i;
	register uint16_t decimal_0;
	register uint16_t decimal_1;
	register uint16_t decimal_2;

	decimal_0 =
	decimal_1 =
	decimal_2 = 0;
	/$
    	mov		#16,@i
bin2bcd32_1
		rla   	@bin.0
   		dadd  	@decimal_0,@decimal_0
   		dadd  	@decimal_1,@decimal_1
   		dadd  	@decimal_2,@decimal_2
   		dec   	@i
   		jnz   	bin2bcd32_1
   		mov		#16,@i
bin2bcd32_2
		rla   	@bin.1
   		dadd  	@decimal_0,@decimal_0
   		dadd  	@decimal_1,@decimal_1
   		dadd  	@decimal_2,@decimal_2
   		dec   	@i
   		jnz   	bin2bcd32_2
   		mov.b	@decimal_2,0(@bcd)
   		mov.b	@decimal_1,2(@bcd)
   		swpb	@decimal_1
   		mov.b	@decimal_1,1(@bcd)
   		mov.b	@decimal_0,4(@bcd)
   		swpb	@decimal_0
   		mov.b	@decimal_0,3(@bcd)
   	$/
#else
	int i;
	char buf[10 + 1];

	sprintf (buf, "%10ld", bin);
	for (i = 0;  i < 5;  i++)
		bcd[i] = ((buf[2*i] & 0x0F) << 4) | (buf[2*i + 1] & 0x0F);
#endif
}