combining variables

[vshortt]

Working with a DS1307

Is there a way to combine variables like this:

b1 = 1
b2 = 2

b3 = (b1 + b2) = "12"

b3 = 12

Is there a way to do this? I don't want to add them together, I just want put combine them...

 

[ckoehn]

b3=b1*10+b2 '??
b3=12

 

[vshortt]

b3=b1*10+b2 '??
b3=12

Oh my gosh... why didn't I think of that? okay.. I'm an idiot..

 

[BeanieBots]

Except, if you are working with a DS1307 I would GUESS that you want BCD numbers?

So
b1=1
b2=2

b3= b1*16 + b2

ie. b3 = $12

 

[vshortt]

Except, if you are working with a DS1307 I would GUESS that you want BCD numbers?

You're right, since they come out in BCD format, there was one more step I have add, here's how I get the hours. Since the ASCII value is just the number plus $30 - just do it backwards... subtract $30 and voila!

b3 = b1-$30*10 + b2-$30 =

B3 = 12

 

[hippy]

Are you dealing with decimal, BCD or ASCII ? The DS1307 uses BCD data.

 

[marcos.placona]

This is what I use to convert BCD to decimal (i.e. when getting data back from a DS1307):

BCDtoDec:
	tmpB4 = value / 16 * 10	'conv 16's column
	value = value & $0F + tmpB4
return

 

[vshortt]

Are you dealing with decimal, BCD or ASCII ? The DS1307 uses BCD data.

I'm dealing with ASCII becuase I use BCDTOASCII to convert the number.

symbol seconds = b1             ' symbol declaration for "seconds"
hi2cin [%11010000], 0,(seconds) ' read the seconds variable DS1307
                                ' use DS1307 i2c address because there is more than one chip on the i2c bus
 BCDTOASCII seconds,b2,b3       ' convert BCD variable to two ASCII numbers
 b50 = b2-$30*10 + b3-$30       ' convert ASCII to numerical and do math to add together,  b50 now equalis a whole number between 1 and 59
'continue code.....

 

[hippy]

As you seem to be using an X1 or X2 you can simplify that to ...

hi2cin [%11010000], 0,(seconds)
seconds = BcdToBin seconds

An illustration of where the question asked does not necessarily reflect what one wants to achieve.

 

[vshortt]

As you seem to be using an X1 or X2 you can simplify that to ...

hi2cin [%11010000], 0,(seconds)
seconds = BcdToBin seconds

An illustration of where the question asked does not necessarily reflect what one wants to achieve.

Thanks for the shortcut. I Think I've illustrated what I wanted to achieve in detailed enough manner.