KOBA789

pi@raspberrypi ~/qpuinfo $ git log -1 -p
commit d3d4745808231202a19365458e283d730e3d1a2e
Author: Terminus <i.can.speak.c.and.basic@gmail.com>
Date:   Sun Feb 8 05:06:01 2015 +0900

    change to point physical address, not bus address

    Special thanks to @KOBA789 !

diff --git a/mapmem.c b/mapmem.c

ginrou

#!/bin/env python
import numpy as np
import scipy.misc
from scipy.fftpack import dct, idct
import sys

H = 128
W = 128

lenna = scipy.misc.imresize(scipy.misc.lena(), (H, W)).astype(float)

shyouhei

新社会人に必須である：

• 勤務先との書面による「労働契約」。業務委託契約等NG。
• 多寡を問わず毎月払われる給料。遅配等論外である。
• 健康保険。
• 労災保険。
• 雇用保険。
• 三六協定。
• 年次有休。
• 育児休業の制度があり取得者がいる会社に勤務する。

gbaman

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

rogerhub

// clang -o smc smc.c -framework IOKit -framework CoreFoundation

/*
 * Apple System Management Control (SMC) Tool
 * Copyright (C) 2006 devnull
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

stonehippo

Getting a USB device to show up in a Docker container on OS X

Some background

I was trying to get the Arduino IDE to work inside a Docker container on OS X. I was able to get the IDE working (see Getting X11 GUI applications to work on OS X with Docker), but I could not figure out how to make the USB port for the Arduino visible.

The solution

I first tried to directly map hardware serial port into the Docker container, doing something like this:

scchan

#include <random>
#include <algorithm>
#include <iostream>
#include <cmath>

// header file for the hc API
#include <hc.hpp>

#define N  (1024 * 500)

qnighy

Jordan標準形 (Jordan normal form)

K:代数閉体, V:有限次元のK-線形空間, f : V → V 線形写像のとき、Vの基底を上手く選ぶと表現行列がJordanブロックを対角線上に並べた行列になる。

この標準形はJordanブロックの順列を除いて一意である。

計算方法1: 固有方程式を解き固有値を得る。(A-λI)x=0となるxを探す。(A-λI)y=xとなるyを探す。これを止まるまで繰り返すことで基底の一部が得られる。別の固有ベクトルや別の固有値に対しても同様のことを行う。

有理標準形 (Frobenius normal form)

Terminus-IMRC

$(info ** Remaking: MAKE_RESTARTS=$(MAKE_RESTARTS) **)

#
# If WAIT >= t, this Makefile will loop infinitely.
# If WAIT < t, it won't loop infinitely due to filesystem's time resolution.
# +------------+------+
# | Filesystem | t    |
# +------------+------+
# | ext4       | 0.01 |
# | hfsplus    | 1    |

primenumber

// CUDA Othello Solver
// License: GPL 3

#include <cstdio>
#include <cassert>

constexpr int threadsPerBlock = 128;
constexpr int simdWidth = 4;
constexpr int nodesPerBlock = threadsPerBlock/simdWidth;
constexpr int MAX_DEPTH = 10;