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scintill / 427-usb-gamepad.md
Last active November 20, 2020 22:21
EC EN 427 USB gamepad

USB gamepad support

I had some fun adding USB gamepad support to my Space Invaders game and thought others might enjoy it. I used built-in Linux drivers. I tested with a Nintendo Switch USB controller (D-pad to move, any button to fire.) Some of the code might need to be adjusted for other controllers; there are some comments in that section that might help.

The basic idea is to hackily extend the intc module to be able to also check the gamepad device and return a fake interrupt flag for it, though Linux is itself handling whatever real interrupts are associated with USB. When that flag is set, I read from the device to see what the input is, and pass it to the rest of the game.

Here are some snippets in diff format from git, which probably won't fit your files exactly, but should give an idea of what I changed.

diff --git a/userspace/apps/space_invaders/CMakeLists.txt b/userspace/apps/space_invaders/CMakeLists.txt
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scintill / convert-tagnotepad-to-ios-notes.php
Last active June 28, 2020 21:43
Convert Android com.kyakujin.android.tagnotepad to Evernote .enex file (targeting iOS notes app)
<?php
// # adb backup com.kyakujin.android.tagnotepad
// # java -jar ~/Downloads/abe-all.jar unpack backup.ab - 1 | tar -x --strip-components=3 apps/com.kyakujin.android.tagnotepad/db/tagnotepad.db # https://github.com/nelenkov/android-backup-extractor
// https://gist.github.com/evernotegists/6116886
// https://github.com/panicsteve/enex-dump/blob/master/enex-dump.php
// https://raw.githubusercontent.com/fabiospampinato/enex-dump/master/resources/test.enex
function formatDate(DateTimeImmutable $date) {
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scintill / raspberry-pi-printer.md
Created August 21, 2019 06:31

Tested with HP LaserJet 1018.

  1. Set up Raspbian buster as usual. https://raspberrypi.stackexchange.com/a/57023 helped with headless setup of Wifi and SSH.
  2. Change /etc/hostname and /etc/hosts to set hostname.
  3. sudo apt-get install cups hplip
  4. sudo hp-setup -i
  5. sudo cupsctl --share-printers
  6. avahi-browse -art on desktop should show your printer.

You can forward port 631 over ssh to log in to the CUPS web interface. You may have to set a root password to do certain operations over the browser interface.

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scintill / Dockerfile
Created May 31, 2019 23:07
wine dockerfile
FROM scottyhardy/docker-wine@sha256:ca0481f5c953cbb9c40ce6e91c01f9bf06ea7de73094663f13931778f1060a58
# use win32
ARG WINEARCH=win32
# I don't want HOME as a volume, but baked in to the image
RUN usermod --home /home/wineuser2 wineuser && cp -pr /etc/skel ~wineuser && chown wineuser:wineuser ~wineuser
WORKDIR /home/wineuser2
# install winetricks prereqs
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scintill / solve.pl
Last active July 10, 2018 10:08
Puzzle solver in Prolog
% match head and tail, left/right, top/bottom
partsMatch(top(Type), bottom(Type)).
partsMatch(bottom(Type), top(Type)).
cardsMatch(card(_, Right, _, _), right, card(_, _, _, Left)) :- partsMatch(Right, Left).
cardsMatch(card(_, _, Bottom, _), down, card(Top, _, _, _)) :- partsMatch(Bottom, Top).
% define card rotation
rotate(card(A, B, C, D), 0, R) :- R = card(A, B, C, D).
rotate(card(A, B, C, D), 1, R) :- R = card(B, C, D, A).
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scintill / Dockerfile
Created August 30, 2017 08:58
docker-uqmi
FROM trinitronx/build-tools:alpine-3.6
RUN apk add --no-cache cmake
RUN git clone https://git.openwrt.org/project/uqmi.git
RUN git clone https://git.openwrt.org/project/libubox.git
RUN git clone https://github.com/json-c/json-c.git
WORKDIR /json-c
RUN ./autogen.sh && ./configure && make install
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scintill / README.md
Created June 5, 2017 00:27
redirect syslog to stderr

LD_PRELOAD this as a library to output a binary's output from syslog() on stderr as well as any syslog daemon that's listening (useful for Docker, if you want all log output to be collected by Docker's standard output handling.) Beware though, if the program changes its stderr file descriptor (closes it, points it at /dev/null, pipes it out to a socket), this can have surprising results. For example, when I tried this with cyrus-imapd, I was getting syslog output sent to remote clients because stderr and stdout were remapped that way (not maintaing the original fd that Docker set up.)

Example Docker implementation

COPY syslog2stderr.c /build
RUN gcc -fPIC -shared /build/syslog2stderr.c -o /usr/local/lib/syslog2stderr.so
RUN echo /usr/local/lib/syslog2stderr.so &gt;&gt; /etc/ld.so.preload
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scintill / dumpinterface.php
Created June 20, 2014 23:39
<?php
/**
* Extract an interface definition from an existing class.
*
* Found while cleaning up old files -- I am only assuming it works. :)
*/
$class = new ReflectionClass($className);
foreach ($class->getMethods(ReflectionMethod::IS_STATIC | ReflectionMethod::IS_PUBLIC) as $method) {
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scintill / testCrypto.html
Last active January 2, 2016 18:59 — forked from artiomchi/testCrypto.html
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript">
var BSeed = [109,198,182,214,76,65,92,201,96,30,77,82,22,38,127,144,66,220,135,226,199,188,185,224,68,72,86,200,207,89,236,132,118,240,224,214,210,71,46,165,72,72,241,136,190,48,103,38,243,175,82,65,130,140,34,108,55,87,63,222,169,168,3,44,50,22,113,202,64,182,166,124,123,89,209,193,176,176,107,24,50,80,85,139,75,215,173,132,113,63,23,150,242,240,195,13,143,244,101,214,118,20,220,192,241,156,151,181,88,121,122,44,162,249,239,79,120,28,232,34,57,72,155,52,152,61,196,108,176,218,165,122,184,57,144,172,232,28,8,58,24,155,56,36,215,137,41,196,115,107,181,106,104,22,249,1,110,22,2,124,247,79,110,172,231,210,172,231,170,217,171,145,42,233,100,97,15,74,197,76,192,160,139,151,27,148,235,71,131,142,92,13,236,145,165,251,149,155,149,73,232,145,247,152,141,191,90,170,5,170,126,247,37,45,62,59,76,72,23,150,202,182,80,168,255,123,204,71,151,56,166,197,65,31,46,23,165,250,153,246,242,140,12,32,244,100,117,67,45,187,174,211,80,214,104,97,70,22,94,7,19
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scintill / ego.md
Last active January 12, 2021 21:34
List of repositories I've contributed to

My forks of these repos were cluttering up my repository list. I liked being able to see where my patches had been accepted, but wanted to get rid of my clones. So here's a list of things I've pruned off my personal repo list, but that exist in the upstream repo.