구차니의 잡동사니 모음

$ cat sr04.c

/*

 *  dht11.c:

 *      Simple test program to test the wiringPi functions

 *      DHT11 test

 */

#include <wiringPi.h>

#include <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include <sys/time.h>

#define TRIG_PIN        4

#define ECHO_PIN        5

void read_sr04_dat()

{

        int counter = 0;

        struct timeval start_point, end_point;

        double operating_time;

        double len;

        pinMode(TRIG_PIN, OUTPUT);

        pinMode(ECHO_PIN, INPUT);

        digitalWrite(TRIG_PIN, LOW);

//      delay(500); // 500 msec

        digitalWrite(TRIG_PIN, HIGH);

        delayMicroseconds( 10 );

        digitalWrite(TRIG_PIN, LOW);

        while ( digitalRead(ECHO_PIN) == LOW)

        {

                counter++;

                delayMicroseconds( 1 );

                if ( counter == 38000 )

                {

                        return;

                }

        }

        gettimeofday(&start_point, NULL);

        while ( digitalRead(ECHO_PIN) == HIGH)

        {

                counter++;

                delayMicroseconds( 1 );

                if ( counter == 38000 )

                {

                        return;

                }

        }

        gettimeofday(&end_point, NULL);

        operating_time = (double)(end_point.tv_sec)+(double)(end_point.tv_usec)/1000000.0-(double)(start_point.tv_sec)-(double)(start_point.tv_usec)/1000000.0;

        len = operating_time * 34300 / 2;

        printf("%f sec %4.2f cm %d\n",operating_time, len, counter);

}

int main( void )

{

        if ( wiringPiSetup() == -1 )

                exit( 1 );

        while ( 1 )

        {

                read_sr04_dat();

                delay( 100 ); /* wait 1sec to refresh */

        }

        return(0);

$ sudo apt-get install redmine

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

  bundler dbconfig-common fonts-droid ghostscript imagemagick-common libev4 libfcgi-ruby1.9.1

  libfcgi0ldbl libgmp-dev libgmpxx4ldbl libgs9 libgs9-common libijs-0.35 libjbig2dec0

  libjs-coffeescript libjs-jquery-ui libjs-prototype libjs-scriptaculous libjsoncpp0 liblqr-1-0

  libmagickcore-6.q16-2 rake redmine-sqlite ruby-actionmailer ruby-actionpack

  ruby-actionpack-action-caching ruby-actionview ruby-activemodel ruby-activerecord

  ruby-activesupport ruby-arel ruby-atomic ruby-awesome-nested-set ruby-blankslate ruby-builder

  ruby-celluloid ruby-coderay ruby-coffee-rails ruby-coffee-script ruby-coffee-script-source

  ruby-dev ruby-erubis ruby-execjs ruby-fcgi ruby-ffi ruby-hike ruby-hmac ruby-i18n

  ruby-jbuilder ruby-jquery-rails ruby-json ruby-listen ruby-mail ruby-mime-types ruby-minitest

  ruby-multi-json ruby-net-http-persistent ruby-net-ldap ruby-oj ruby-openid ruby-passenger

  ruby-polyglot ruby-protected-attributes ruby-rack ruby-rack-openid ruby-rack-test ruby-rails

  ruby-rails-observers ruby-railties ruby-rb-inotify ruby-redcarpet ruby-request-store

  ruby-rmagick ruby-sass ruby-sass-rails ruby-sdoc ruby-spring ruby-sprockets

  ruby-sprockets-rails ruby-sqlite3 ruby-thor ruby-thread-safe ruby-tilt ruby-timers

  ruby-treetop ruby-turbolinks ruby-tzinfo ruby-uglifier ruby-yajl ruby2.1-dev sqlite3 zip

Suggested packages:

  virtual-mysql-client mysql-client postgresql-client ghostscript-x libgmp10-doc libmpfr-dev

  coffeescript libjs-jquery-ui-docs libmagickcore-6.q16-2-extra bzr cvs darcs mercurial

  subversion ruby-builder-doc rails ruby-passenger-doc ruby-compass treetop doc-base sqlite3-doc

The following NEW packages will be installed:

  bundler dbconfig-common fonts-droid ghostscript imagemagick-common libev4 libfcgi-ruby1.9.1

  libfcgi0ldbl libgmp-dev libgmpxx4ldbl libgs9 libgs9-common libijs-0.35 libjbig2dec0

  libjs-coffeescript libjs-jquery-ui libjs-prototype libjs-scriptaculous libjsoncpp0 liblqr-1-0

  libmagickcore-6.q16-2 rake redmine redmine-sqlite ruby-actionmailer ruby-actionpack

  ruby-actionpack-action-caching ruby-actionview ruby-activemodel ruby-activerecord

  ruby-activesupport ruby-arel ruby-atomic ruby-awesome-nested-set ruby-blankslate ruby-builder

  ruby-celluloid ruby-coderay ruby-coffee-rails ruby-coffee-script ruby-coffee-script-source

  ruby-dev ruby-erubis ruby-execjs ruby-fcgi ruby-ffi ruby-hike ruby-hmac ruby-i18n

  ruby-jbuilder ruby-jquery-rails ruby-json ruby-listen ruby-mail ruby-mime-types ruby-minitest

  ruby-multi-json ruby-net-http-persistent ruby-net-ldap ruby-oj ruby-openid ruby-passenger

  ruby-polyglot ruby-protected-attributes ruby-rack ruby-rack-openid ruby-rack-test ruby-rails

  ruby-rails-observers ruby-railties ruby-rb-inotify ruby-redcarpet ruby-request-store

  ruby-rmagick ruby-sass ruby-sass-rails ruby-sdoc ruby-spring ruby-sprockets

  ruby-sprockets-rails ruby-sqlite3 ruby-thor ruby-thread-safe ruby-tilt ruby-timers

  ruby-treetop ruby-turbolinks ruby-tzinfo ruby-uglifier ruby-yajl ruby2.1-dev sqlite3 zip

0 upgraded, 93 newly installed, 0 to remove and 0 not upgraded.

Need to get 850 kB/21.7 MB of archives.

After this operation, 83.3 MB of additional disk space will be used.

Do you want to continue? [Y/n] 

$ sudo apt-get install apache2 mysql-server redmine redmine-mysql libapache2-mod-passenger

$ sudo ln -s /usr/share/redmine/public /var/www/redmine

$ sudo chown -R www-data:www-data /var/www/redmine

$ sudo vi /etc/apache2/sites-available/redmine.conf

DocumentRoot /var/www/

PassengerDefaultUser www-data

<Location /redmine>

RailsEnv production

RackBaseURI /redmine

Options -MultiViews

</Location>

$ sudo a2dissite 000-default

$ sudo a2ensite redmine

$ sudo /etc/init.d/apache2 reload

$ sudo /etc/init.d/apache2 restart