Category Archives: Technology

Really everything related to technology

Development, Electronics, Rockbox, Technology

Portably Yours

Archos PlayerOne day in late 2001 I had a talk with my brother Björn and our mutual friend Linus about how their portable MP3 player was very cool but the software/firmware on it was rather limited and lame in many ways. (Correct, I didn’t own any portable music player at that time). As usual, we brought up the idea about being able to hack it yourself and oh how good couldn’t you make it then? Not very long afterwards, we had a mailing list setup for discussing how to reverse engineer and improve the Archos Player firmware. Personally, I had no device yet but it sounded like good fun so I subscribed and participated from the start. After a few months, I got myself an Archos Recorder to be able to get down on the metal too, and the Recorder was also slightly different and thus brought some more challenges to the team.

Archos Recorder

Archos RecorderThe Recorder was a step forwards since it provided better sound and a (gasp!) graphical LCD. Some of the first work I did in the Rockbox project was to work on the code for the LCD, to bring text to it using fonts and to provide line drawing routines etc. Keeping the entire screen in a separate “frame buffer” that is updated to the screen with a lcd_update() call was an early design decision that has stuck ever since.

We took the Rockbox a long way supporting more and more of the early SH-based Archos targets, including the V2s, the FM and the Ondio series. But eventually of course the models started to get hard to get and out of production. It was time to start looking into moving to other targets, and other targets would more or less force us into a world with software audio codecs!

I got my original Recorder stolen, but I had it replaced and put in a 80GB disk and it was much rejoicing.

iriver h140

iriver h140We did scan the market for targets that used somewhat standard components for which we could get specs and docs and we found the iriver h1x0 series and the work began. As usual we got plenty of help from everywhere and it didn’t take too long to show the nay-sayers that we could indeed transition Rockbox into the future with software codecs. We also took it to the h3x0 series with its color screen not that long after and my golly, didn’t an entirely new world of opportunities open? 40GB of disk was just about enough to hold most of my music collection.

iAudio X5

iAudio X5What’s the fun of Rockbox if I couldn’t follow along? I got the iAudio X5 early on in the porting effort and joined in and got my first color-screen target. Of course I didn’t like how the mere 20GB disk narrowed what music I was bringing with me, but hey some sacrifices had to be made for the greater good of advancing Rockbox! 😉

Rockbox was now booming and flourishing, coming to new targets all over and getting more and more developers involved.

Sansa E260

Sandisk Sansa e260A guy from SanDisk contacted us asking about a Rockbox port to their Sansa E200 series, and even though they sent me a bunch of targets etc they never provided any docs or actual help on the effort of porting Rockbox to these babies. Not even the figuring out the firmware format, as that was instead made by our own secret super-hero MrH.

Meizu M6

Time flies and soon enough (like in the late 2007) none of the targets Rockbox ran fine on were no longer being manufactured and started to get hard to get in shops all over the world. The eternal race to get Rockbox ported to a currently manufactured model of course just got more important.

It was almost two years since I got the Sansa e200 series from SanDisk and it was time to join in the efforts of bringing Rockbox to some Meizus. The amount of interested people and the existence of a (leaked) data sheet for the main SoC helped me settle for buying this.

Cowon D2

As I’ve already explained, I bought a D2 too at the same time I got the Meizu so that I could do comparison for people and just play around some extra.

Of course, my timing is dubious as I got my two new targets exactly at the same period in my life when I went back to work (almost) full-time from having been on paternity leave for six months. Together with my extra “admin duties” such as the euro devcon and gsoc 2008 happening, I really haven’t had much time to actually dive into low-level fiddling with the ports yet. Hopefully I soon get adjusted and get some time to really help out.

Electronics

RF4CE goes 2.4GHz

I learned about the new consortium called RF4CE (Radio Frequency for Consumer Electronics) that seems to consist of a range of the consumer electronics giants (but oddly I cannot find any actual web site explaining any details on this gang) and they’re obviously working on a new remote control standard based on the IEEE 802.15.4 standard so hopefully we’ll soon see remote controls go to the 2.4GHz band and fight the growing number of devices there, to make remote controls more functional on wider ranges than the somewhat limited infrared thingies current devices use.

Oh, and of course that’ll force us to buy new “all-in-one” remote controls soonish… 🙂

Freescale press-release, Sony press-release

Electronics, Open Source

Twentyfour inches any good?

My 19″ (Acer) LCD screen at work died the other day. It started flickering a lot and when I tried to switch it off/on to see if the flickering would go away, it wouldn’t go back on again.

I got a lowly 1280×1024 screen to borrow until my new screen would arrive and I got to experience that using the panning screen thing of Kubuntu (my desktop would remain 1600×1200 since I preferred not to reboot or even shutdown my X) could easily get the mouse coordinates confused and then I had to hurry up to the upper left corner to “reset” the coordinates and then I could again click on the correct items on the screen…an lcd screen

Very well, I got a 24″ 240BW Philips. This being a widescreen thing (they’re really taking over the world, those widescreen versions) it prefers 1920×1200 resolution. My computer had one of them intel graphics chips (82Q963/Q965) on the board and dang, I got no good resolution no matter how I poked the xorg.conf file. After trying out 915resolution, I learned that the graphics card couldn’t in fact show the necessary resolution so I had to insert a card that can. I got a dreaded Nvidia and now I’m using the evil proprietary drivers to get DVI at this resolution…

But I must say that with my 19″ at 1600×1200 and my 20″ at home at the same resolution, bumping up the screen size yet another notch to 24″ makes me think 1920×1200 is kind of on the low side for such a huge screen. I did a quick check on my favourite tech stuff compare site (prisjakt.nu) but it seems there’s no screens with higher resolutions at this size?

IT Politics, Network, Security

Will 2008 become 1984?

Next week in Sweden (June 18th), as reported in several places lately including slashdot, the Swedish parliament is supposed to vote for the pretty far-going law allowing FRA (a swedish defence organization previously involved in radio-surveillance etc) to wire-tap phone calls and computer traffic that cross the Swedish borders. The majority in the parliament is for the law, while it seems most of the ordinary people are against it. The hope is now that a few people will vote against their parties, that they will have the guts to stand up and “do the right thing” instead of following the party line.

I won’t go into how silly, stupid and bad such a law is but I’ll instead just show this great video to all swedes:

(video snipped from here)

stopa FRAlagen nu

This banner says (roughly translated by me) “On June 18th the government will take away your personal integrety. All internet traffic, all phone calls, all email and SMS traffic will be wire-tapped starting January 1st 2009. Big brother sees you! … and violates the Swedish Constitution.”

cURL and libcurl, Network, Open Source, Security

public suffixes list

I noticed the new site publicsuffix.org that has been setup by the mozilla organization in an attempt to list public suffixes for all TLDs in the world, to basically know how to prevent sites from setting cookies that would span over just about all sites under that “public suffix”.

While I can see what drives this effort and since we have the same underlying problem in curl as well, I have sympathy for the effort. Still, I dread “having to” import and support this entire list in curl only to be able to better work like the browsers in the cookie department. Also, it feels like a cat and mouse race where the list may never be complete anyway. It is doomed to lack entries, or in the worst case list “public suffixes” that aren’t any such public suffixes anymore and thus it’ll prevent sites using that suffix to properly use cookies…

There’s no word on the site if IE or Opera etc are going to join this effort.

Update: there are several people expressing doubts about the virtues of this idea. Like Patrik Fältström on DNSOP.

Technology

A drawing made from dots

2 Comments

I read an article at The Register about a Swede called Erik Nordenankar who decided to “paint” the world’s largest painting by packing a GPS in a suitcase and tracking where it goes then download the data and let the computer show the track with a line. Thus, by sending the bag in a creative way he’ll end up with a self portrait of GPS tracks.

Is this the same GPS technology that already has problems indoors of very many buildings? The GPS system that I bet will have a very hard time to function when flown around inside the luggage compartment of a modern jet airplane? I have a feeling that drawing will mostly be a lot of dots to draw lines between…

According to the article, this is a publicity stunt made by DHL.

Electronics, Open Source

Openmoko freeruns Qt

Back at FSCONS ’07, I asked the guy doing the Openmoko presentation about whether they are going GTK or Qt, as his talk mentioned both and he didn’t really spell it out on what horse they were putting their money on. He then thought it was a really funny question and went on to explain how the Openmoko is like a small computer that can run anything you want. A bit like he was educating us that embedded devices do have CPUs that can run actual software. As if they wouldn’t have a main branch and a main development selecting one of these particular toolkits…

Many moon laps later, I discussed Openmoko with a friend over a few stouts at Snaxx 18, and he explained how he’d got one of the dev boards a long time ago and had kept up and tried a lot of versions of it and that it basically never worked to even make simple phone calls. He gave me the impression that perhaps the project wasn’t really that well run if it after this long still don’t have even the most basic functionality present and running stable.Dash Express

Therefor I was happy to listen to TWIT 143 about the Dash Express and them telling me about it being based on the Openmoko platform. It felt like solid proof they are moving in the right direction then, so at least parts of the project must be functioning!

Then, to round it up it was with a big grin I read about the recent news that they are abandoning GTK and are now going to use E17 and Qt instead. Not a trace of any “this is like a small computer it can run anything” talk now (although I do understand that the statement was just something from this person and not any public endorsement from the project or so). This very same Ars Technica article says the first Openmoko based phone called Freerunner is going into “mass production stage next month” (that would be June 2008).

Personally, I can still see how making Rockbox run as an application on an Openmoko device would be a very cool thing.