mharsch

package com.qualcomm.ftcrobotcontroller.opmodes;

import com.qualcomm.robotcore.eventloop.opmode.OpMode;
import com.qualcomm.robotcore.hardware.DcMotor;
import com.qualcomm.robotcore.util.Range;

/**
 * Created by mharsch on 9/12/15.
 */
public class VSpeedTeleOp extends OpMode {

mharsch

Random integer in range algorithm:

given that rand() produces a random number between 0 and RAND_MAX (defined in stdlib.h)
and we want a random integer (rand_index) between 0 and page_range where page_range = malloc_size / page_size

page_range = malloc_size / page_size;

if ( RAND_MAX > page_range ) {
     rand_index = ( rand() % page_range ) * page_size;
} else {

mharsch

var qs = require('querystring');
var request = require('request');

var fbapp = {
  id: '<your fb app id>',
  secret: '<your fb app secret>'
};

var fb_perm = 'email,user_birthday,user_interests,user_location,friends_birthday,friends_interests,friends_location,publish_stream,offline_access,sms';

mharsch

--- notes from my initial pass trying to get wesolows/v8plus to work on linux ---

Download source for both SPL (Solaris Portability Layer) and ZFS from
zfsonlinux.org.  Build both SPL and ZFS packages.  Now you have the libnvpair
library and the necessary solaris header files to build v8plus.

Modify v8plus Makefile.v8plus.defs as follows
    add '-I' include directives to CPPFLAGS for /tmp/zfs/lib/libspl/include and
        /tmp/zfs/include (assuming you downloaded the zfs on linux repo to /tmp)
    add  -DHAVE_IOCTL_IN_UNISTD_H to CPPFLAGS

mharsch

libnvpair is available as a nice independent bundle from the ZFS on Linux project.

To install libnvpair (and it's dependencies) on Ubuntu:

sudo add-apt-repository ppa:zfs-native/stable
sudo apt-get update
sudo apt-get install libnvpair1

mharsch

Connecting a 2012 samsung chromebook XE303C12 ($249 ARM-based model) to a Dell E2209W 22"
widescreen LCD monitor (using a DVI to HDMI cable) produces inconsistent resolution
detection for the external monitor.  The E2209W reports it's optimal resolution
(when connected to the chromebook) to be 1680x1050@60Hz, but often syncs at 1788x1050@60Hz.
On my system, this produces a black stripe on the right side of the screen.  The state of
the external monitor (on/off, connected/disconnected) at boot-time determines whether
or not the resolution will successfully sync to the optimal setting.  Through
trial-and-error, I've determined that the following sequence always lands on the optimal
monitor resolution:

mharsch

mharsch@linbrook:~/tmp$ uname -a
Linux linbrook 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
mharsch@linbrook:~/tmp$ cd papi-5.0.1/
mharsch@linbrook:~/tmp/papi-5.0.1$ cd src/components/cuda
mharsch@linbrook:~/tmp/papi-5.0.1/src/components/cuda$ echo $LD_LIBRARY_PATH
/usr/local/cuda-5.0/lib64:/usr/local/cuda-5.0/extras/CUPTI/lib64:/lib:
mharsch@linbrook:~/tmp/papi-5.0.1/src/components/cuda$ echo $PATH
/home/mharsch/local/bin:/usr/local/cuda-5.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
mharsch@linbrook:~/tmp/papi-5.0.1/src/components/cuda$ ./configure --help|grep with-cu
--with-cuda_incdir=<path> Specify path to CUDA includes

mharsch

ls *.flv | awk '{ print "file '\''"$1"'\''" }'

mharsch

Notes for final nodebots day organizer's meeting:

Chris will record his intro video and give to dshaw before Thursday
length will be 20min max
content will include 'get to blinking led' bootstrap sequence

dshaw recommends following up with all attendees this week to combat attrition

Medellín is considering streaming video toward the end of their event

mharsch

pi@raspberrypi ~ $ cat /etc/network/interfaces
auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet static 
    address 10.0.0.1
    netmask 255.0.0.0