I'm looking for a way to convert a hexadecimal string to a ULONG variable.

[seokgi]

Hello.

When I read the serial number of a DS18B20, it outputs a 12-digit string.
I'd like to convert this to a ULONG variable.
Is there a quick and easy way to do this?

Thank you.

[medelec35]

Hello.
It's not that straight forward as 12 digits = 48 bits and not the ULong 32bits.
For that reason you will require two x 32bits ULongs (Or Martins suggestion below of 3 x 16bits)
I have created a flowchart that will convert the 48bits to ULongL and ULongH
If you want a singe ULong value then you could either use just ULongL .
Alternatively, you could use ULongL and OR it with ULongH to give a new ULongL just in case the ULongL of one device is the same as another but ULongH is different.
The likelihood of that happening is veling low indeed.

[mnfisher]

12 digits won't fit in a 32 bit variable - which could hold 8 hex digits (4bits per digit)

You could convert to 3 x 16bit (unsigned int)

Martin

Ben beat me to it

[seokgi]

Thanks to your interest and help, I'm doing well. I'm sending you my macro file for reference.

[mnfisher]

As an alternative method -take a look at 'hash functions/values' - this is a common technique to assign a (not necessarily but usually) unique value to a string.

See https://en.wikipedia.org/wiki/Hash_function

For some interesting ideas

Martin