new projects and other stuff

posted Jan 23, 2019, 5:32 PM by mince pi   [ updated Jan 23, 2019, 5:32 PM ]

Been a while hasn't it?

A new project is up, pi2oled. The overlay I created for it has been accepted by the Foundation software maintainers, so it should appear in the next Raspbian release. I guess I've achieved a sort of immortality.

I've modified the pi2ws2812 project. It now uses the PWM peripheral, which makes wiring simpler, and allows use of a small PCB to do the interconnect. In exchange it nukes sound. There's no free lunch I guess.

Finally, I'm behind on kernel posting, and I have several other projects in the pipeline. I'll update when I get a chance.

raspbian 2018-10-09

posted Oct 17, 2018, 2:32 PM by mince pi

A new Raspbian is up at the usual location. This includes the new HD44780 kernel driver, and I've begun updating my pi2hd44780 project to use it.

new piRemote project

posted Aug 2, 2018, 6:20 PM by mince pi

I've put up a new project that allows remote control of a Pi, even one without a network interface. It consists of a Pi Zero W. That's it. Find it here.

new pi2ws2812 project

posted May 7, 2017, 9:49 PM by mince pi   [ updated May 7, 2017, 9:52 PM ]

It's been a while, but I've started documenting a new project.

I finally bought a strip of those addressable LEDs. The price was right, even though I don't know what I'll be using them for. While I was waiting for them to arrive, I checked to see what kernel modules were available for driving them. I could only find one that uses the PWM peripheral, and one that uses paced DMA driving the GPIOs. That was kind of disappointing: nobody is using the PCM peripheral. It's perfect for driving them with it's huge FIFO buffer.

So I modified one of my old kernel drivers to do the job. It works great! I even wrote a few demo programs to test it out. The files are posted, but there's no write-up at this point.

raspbian 2017-04-10

posted Apr 27, 2017, 3:32 PM by mince pi   [ updated Apr 27, 2017, 3:36 PM ]

A new Raspbian is up at the usual location. It uses the same kernel as 2017-03-02, so I don't need to upload a new kernel compiling source.

The release notes indicate there are three changes: Wolfram and Flash Player are updated, and PARTUUID is now used for persistent disk names during USB boot.

raspbian 2017-03-02

posted Mar 7, 2017, 2:38 PM by mince pi   [ updated Mar 7, 2017, 2:40 PM ]

Another Raspbian was released, and I've uploaded module compiling source.

This seems to be a recent pattern - a new release a few days after a major release. Maybe I shouldn't be so quick to upload source? At least when the releases are a few days apart it makes it easy to upload - I can do the steps from memory!

raspbian 2017-02-16

posted Mar 3, 2017, 4:54 PM by mince pi   [ updated Mar 3, 2017, 5:01 PM ]

A new version of Raspbian is available. I've uploaded module compiling sources for it.

It supports the new Pi Zero W, and adds a few more general improvements.

I've uploaded modules for this new kernel version to the ps2pi and pi2wifi projects' files pages.

raspbian 2017-01-11

posted Jan 12, 2017, 11:49 AM by mince pi   [ updated Mar 3, 2017, 4:56 PM ]

A new version of Raspbian is available, 2017-1-11. I don't know what changed in it since the release notes haven't been updated.

What I do know is that the kernel version hasn't changed from 2016-11-25, so I won't have to update my modules repository. Yay!

pixel for mac and pc

posted Dec 29, 2016, 11:37 AM by mince pi   [ updated Dec 29, 2016, 11:46 AM ]

The Foundation gave us a little Christmas present: a version of Raspbian that runs on a Mac or PC as a live CD/Flash drive!

I've given it a spin on both an old 1.3GHz ThinkPad, and a desktop Mac. Here are the highlights:
  • It's a live CD, so it doesn't make any changes to the hard disk. Reboot and the computer is back to it's usual operating system.
  • If you boot from USB, any changes you make can be saved. This includes software installs and password changes.
  • Performance on my machines was better than on a Pi 3.
  • The Chromium browser is more stable than when it runs on the Pi.
  • The Epiphany browser is not included. This isn't a problem since Chromium runs so well.
My conclusion: it's a great way to get some use out of old computers!

i'm baaack....

posted Dec 29, 2016, 11:17 AM by mince pi   [ updated Dec 29, 2016, 11:48 AM ]

Well, that was a long break. I tend to be quite busy the last three months of the yearThat doesn't mean that I haven't been making anything though: I just haven't had time to document.

What have I been doing? I started a new project, piDrum. Nothing is posted yet, so stay tuned.

I finally updated the kernel compiling source on Github. It matches the 2016-11-25 kernel now. I also copied the newly compiled modules to the ps2pi, pi2wifi, and pi2hd44780 projects for your convenience. There was also a problem with the esp8089 overlay in the pi2wifi files section, which is now fixed.

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