I had this issue short time ago, I found that a separate routine to
handle units, tens, etc is more efficient and consumes less code, than
splitting, of course depends on the final application, I used this
routine for a timer


struct number
{
	unsigned char u;
	unsigned char d;
	unsigned char c;
};

// Increase (like ++)
void inc(struct number *value)
{

	value->u++;
	if (value->u == 10)
	{
		value->u = 0;
		value->d++;
	}

	if (value->d == 10)
	{
		value->d = 0;
		value->c++;
	}

	if (value->c == 10)
	{
		value->c = 0;
	}
}

// Decrease (like --)
void decr(struct number *value)
{

	value->u--;

	if (value->u == 255)
	{
		value->u = 9;
		value->d--;
	}

	if (value->d == 255)
	{
		value->d = 9;
		value->c--;
	}

	if (value->c == 255)
	{
		value->c = 9;
	}
}

// Number = 0
void clr(struct number *value)
{
	value->u = 0;
	value->d = 0;
	value->c = 0;
}

// Set value to struct
void set(struct number *value, unsigned char c, unsigned char d,
unsigned char u)
{
	value->u = u;
	value->d = d;
	value->c = c;
}

// Test if zero
unsigned char zero(struct number value)
{
	if ((value.u == 0) && (value.d == 0) && (value.c == 0))
		return 1;
	else
		return 0;
}

// Equal two structures
void equal (struct number src, struct number *dst)
{
	dst->u = src.u;
	dst->d = src.d;
	dst->c = src.c;
}



Cristo Alanis 
Design Engineer
Tyco Electronics
2500 Courage Blvd St A
Brownsville Tx 78521
 

> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of picnoob
> Sent: Tuesday, March 06, 2007 12:02 PM
> To: piclist@mit.edu
> Subject: [PIC] seperate num into tens+units
> 
> 
> hi, i need a way to seperate a number, say 54. and put 5 in a 
> register called tens, and 4 in another called units.
> 
> is there some binary operation to do this, or will it have to 
> be a custom subroutine?
> 
> i need this kinda fast, can someone help?
> --
> View this message in context: 
> http://www.nabble.com/seperate-num-into-tens%2Bunits-tf3356654
> .html#a9335697
> Sent from the PIC - [PIC] mailing list archive at Nabble.com.
> 
> --
> http://www.piclist.com PIC/SX FAQ & list archive View/change 
> your membership options at 
> http://mailman.mit.edu/mailman/listinfo/piclist
> 

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