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Radosław Kujawa rkujawa

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@rkujawa
rkujawa / TEA5767_test.ino
Last active June 22, 2018 08:17
#include <Wire.h>
void setup()
{
Wire.begin();
Wire.beginTransmission(0x60); // transmit to device
Wire.send(0x40); // byte 1
@rkujawa
rkujawa / gist:a0c7d4c7146eb7e6629028bdb024d5b6
Created April 13, 2018 18:17
spare itx box
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
The NetBSD Foundation, Inc. All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
NetBSD 7.0_STABLE (GENERIC.201604041900Z)
total memory = 3949 MB
avail memory = 3817 MB
kern.module.path=/stand/amd64/7.0/modules
@rkujawa
rkujawa / fooapp.c
Created August 29, 2017 21:42
fooapp - C source
#include <stdio.h>
#include <unistd.h>
int
main(int argc, char *argv)
{
printf("let's try to run execve!\n");
execve("/bin/sh", 0, 0);
@rkujawa
rkujawa / fooapp.te
Created August 29, 2017 21:42
fooapp - SELinux policy
policy_module(fooapp, 1.0.19)
require {
type unconfined_t;
role unconfined_r;
class process { transition siginh noatsecure rlimitinh };
}
attribute_role fooapp_roles;
roleattribute system_r fooapp_roles;
@rkujawa
rkujawa / gist:b7456d987b8e05444af095e79bd9b007
Created July 21, 2017 15:10
cpu video_cyc= 0 0@ 0 : $00fc0008 : 46f8 2700 move $2700.w,sr
cpu video_cyc= 20 20@ 0 : $00fc000c : 3e7c 1000 movea.w #$1000,sp
cpu video_cyc= 28 28@ 0 : $00fc0010 : 4eb9 00fc 001c jsr $fc001c
cpu video_cyc= 48 48@ 0 : $00fc001c : 7002 moveq #2,d0
cpu video_cyc= 52 52@ 0 : $00fc001e : 23c0 0000 1000 move.l d0,$1000
cpu video_cyc= 72 72@ 0 : $00fc0024 : 4e75 rts
cpu video_cyc= 88 88@ 0 : $00fc0016 : 4e71 nop
cpu video_cyc= 92 92@ 0 : $00fc0018 : 60fc bra.s $fc0016
cpu video_cyc= 104 104@ 0 : $00fc0016 : 4e71 nop
cpu video_cyc= 108 108@ 0 : $00fc0018 : 60fc bra.s $fc0016
@rkujawa
rkujawa / compiling.sh
Created May 1, 2017 21:59
Compiling GPU accelerated things on Fedora 26
# using plain CUDA (requires cuda-devel)
nvcc --compiler-options "-std=c++98" -I /usr/include/cuda/ -o executable source.cu
# using OpenACC with NVPTX (requires gcc-offload-nvptx and cuda-devel)
gcc source.c -fopenacc -foffload=nvptx-none -foffload="-O3" -O3 -o executable
# using OpenCL with CUDA backend (requires cuda-devel, opencl-headers, ocl-icd, ocl-icd-devel)
gcc -Wall -W -O3 -I /usr/include/cuda -o executable source.cpp -L/usr/lib64 -Wl,-R,/usr/lib64 -lOpenCL
@rkujawa
rkujawa / HL-L2360DW.md
Created March 9, 2017 20:12
Using Brother HL-L2360DW on NetBSD 
$ cat /etc/printcap | grep '^[^#]'
ps|Brother:\
        :lp=:lf=/var/log/lpd-errs:mx#0:sh:\
        :sd=/var/spool/output/lpd/ps:\
        :rm=BRWxxxxxxxxxxxx.local:\
        :rp=pcl_p1:\
        :if=/opt/printing/filter-ps2pcl.sh:
$ cat /opt/printing/filter-ps2pcl.sh
#!/bin/sh
@rkujawa
rkujawa / lockme.c
Created October 17, 2016 16:00
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/file.h>
static const char *filename = "/tmp/lockme";
int
@rkujawa
rkujawa / ivecs.c
Created September 17, 2016 21:24
/*
* Preliminary driver for an Indivision ECS graphics core.
*
* The amiga bus_space(9) implementation does not have bus_space_poke/peek
* functions implemented. These would be useful, as there's no way to detect
* Indivision ECS without writing to bus space.
*
* TODO:
* - everything
* - man page
@rkujawa
rkujawa / keybase.md
Created September 8, 2016 05:25

Keybase proof

I hereby claim:

  • I am rkujawa on github.
  • I am rkujawa (https://keybase.io/rkujawa) on keybase.
  • I have a public key whose fingerprint is B86D EF7A EC86 3837 E705 B978 3013 7C07 1B07 18AF

To claim this, I am signing this object: