Tollef Fog Heen's blog

tfheen Tue, 22 Jul 2008 - Kernel patches and the TEMPer USB thermometer

Today, I submitted my two first patches to the kernel. One is fairly trivial (remove a USB ID from the pl2303 driver), the other is a fixup of a patch from some other guy, which adds support for DTR, RTS and CTS to the ch341 driver. Yay, hopefully they'll get accepted.

The reason for this journey into kernel land is I got a TEMPer USB thermometer in the mail yesterday. After a fair bit of digging around, I found some source code to drive it from C# and Windows. I wanted to poke at it from Linux and C.

After more poking, I found it's an I2C device connected to the USB serial adapter, where you talk to it by twiddling DTR, RTS and CTS. The C# code was fairly easy to port, so now I can get temperature readings from the command line. The code is a quick hack, but I guess it might be interesting to some people. Oh, and the calibration seems entirely off (but it was off in Windows too), so feedback on whether it's more accurate for other people would be appreciated.

[10:17] | tech | Kernel patches and the TEMPer USB thermometer

tfheen Mon, 14 Jul 2008 - eweouz (bbdb-a-like) working

Some years ago, when I hacked on a TDB backend for Evolution Data Server (EDS), I also wrote something about writing some command line tools for accessing my contacts and so on. I've finally gotten my act together and wrote the necessary glue to have addres completion between Gnus and EDS. It's nowhere as feature-complete as BBDB is, but it allows you to complete addresses, at least. Get it from git (gitweb). I'll hopefully expand it a little bit and cut a release fairly soon.

[22:46] | tech | eweouz (bbdb-a-like) working

tfheen Mon, 14 Jul 2008 - Vacation time

It's been summer for a while already, but I have been busy with work and we have been busy with buying a house which we are taking possession of on August 1st. Together with that comes a zillion things to plan as well as a lot of packing (which we have barely started with).

We are also having a little bit of summer vacation. We took the train (and bus) to Molde yesterday with loads of luggage and Odin and everything. A bit of a stressful start, but it worked out ok and I got to read almost a whole book.

Today, we have been out for a walk, visiting some of Karianne's family and helping put a boat on the water. We also spent a bit of time planning what we need to do (or don't need to do) with the kitchen and two bathrooms. Not a very exciting day, but it's vacation so that's fine.

I also got an SMS from Mie (after a little bit of prodding) telling us she given birth to a small girl. Lots of congratulations from us here.

[00:01] | life | Vacation time

Tollef Fog Heen <tfheen@err.no>