This is based on the origional rprintf by Pascal Stang. however numDigits now refers to digits after decimal point, and the is no '+' character printed for +ive numbers.

void rprintfFloat(char numDigits, double x)
{
	unsigned char firstplace = FALSE;
	unsigned char negative;
	unsigned char i=255, digit;
	double place = 1.0;
 
	// save sign
	negative = (x<0);
	// convert to absolute value
	x = (x>0)?(x):(-x);
 
	// find starting digit place
	for(i=0; i<15; i++)
	{
		if((x/place) < 10.0)
			break;
		else
			place *= 10.0;
	}
	// print polarity character
	if(negative)
		rprintfChar('-');
	//else
	//	rprintfChar('+');
 
	// print digits
	for(;i;i--)
	{
		digit = (x/place);
 
		if(digit | firstplace | (place == 1.0))
		{
			firstplace = TRUE;
			rprintfChar(digit+0x30);
		}
		else
			rprintfChar(' ');
 
		if(place == 1.0)
		{
			rprintfChar('.');
			i=numDigits;
		}
 
		x -= (digit*place);
		place /= 10.0;
	}
}