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James Peret 5 years ago
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_drafts/2016-03-24-jasper-install.md

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+---
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+layout: post
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+title:  "Jasper Install"
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+date:   2016-03-24 21:14:01
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+categories: article diary
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+published: false
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+image:
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+  feature: artpimp-radio.jpg
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+  topPosition: 0px
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+bgContrast: dark
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+bgGradientOpacity: darker
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+syntaxHighlighter: yes
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+---
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+
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+This tutorial will cover how to install the Jasper speech project in a Raspberry Pi 3 using the Raspbian Jesse OS.
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+
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+## Configuring Audio
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+
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+Follow this [tutorial](http://cagewebdev.com/index.php/raspberry-pi-getting-audio-working/) to get audio working on the raspberry pi using a external microfone or sound card. To keep your configurations aftwards, follow this [tutorial](http://www.linuxcircle.com/2013/05/08/raspberry-pi-microphone-setup-with-usb-sound-card/.)
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+
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+## python pip problems
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+
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+If you have problems with pip, try uninstalling it and then using *easy_install* to reinstall pip:
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+
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+```bash
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+    apt-get remove python-pip
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+    easy_install pip
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+```
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+
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+## Links
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+
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+- [Making Jasper use the AT&T Speech API](http://changingjasper.blogspot.de/2014/06/making-jasper-use-at-speech-api.html)
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+- [Better system for sharing modules](https://github.com/jasperproject/jasper-client/issues/163) - Interesting conversation about a module sharing system
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+- [Jasper Module Hub](http://jaspermoduleshub.herokuapp.com/) - Experimental website with some jasper modules
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+- [Parsing English in 500 lines of Python](https://spacy.io/blog/parsing-english-in-python)
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+- [Give "Jasper" a different name](https://github.com/jasperproject/jasper-client/issues/8)
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+- [Building application with pocketsphinx](http://cmusphinx.sourceforge.net/wiki/tutorialpocketsphinx)

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_drafts/2016-04-25-RPI-Touchscreen.md

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+---
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+layout: post
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+title:  "Raspberry Pi Touchscreen Tutorial"
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+date:   2016-04-25 15:25:01
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+categories: article diary
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+published: false
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+image:
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+  feature:
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+  topPosition: 0px
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+bgContrast: dark
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+bgGradientOpacity: darker
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+syntaxHighlighter: yes
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+---
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+
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+Sainsmart doesn’t provide any sources or usefull information, but the module is very easy to use.
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+
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+First, install the display module on the Raspberry Pi board, and power it.
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+
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+Now, install fbtft kernel with SPI DMA support.
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+
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+sudo REPO_URI=https://github.com/notro/rpi-firmware rpi-update
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+Download waveshare overlays and copy them in /boot/overlays/.
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+
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+cd /tmp
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+git clone https://github.com/swkim01/waveshare-dtoverlays.git
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+sudo cp waveshare-dtoverlays/*.dtb /boot/overlays/
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+Specify this overlay file in your /boot/config.txt along with activating SPI.
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+
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+sudo nano /boot/config.txt
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+Add these 2 lines at the end of the file :
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+
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+dtparam=spi=on
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+dtoverlay=waveshare32b
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+Enable console on the display
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+
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+Edit /boot/cmdline.txt
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+
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+sudo nano /boot/cmdline.txt
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+At the end of the line, add this :
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+
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+fbcon=map:10
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+This is also where you could rotate the console display, with fbcon=rotate:n where n is a different orientation (0,1,2,3)
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+
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+Enable X window on the display
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+
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+Edit xorg config file and change default framebuffer device (fb0) to our new framebuffer (fb1)
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+
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+sudo nano /usr/share/X11/xorg.conf.d/99-fbturbo.conf
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+Change this line to fb1 :
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+
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+Option          "fbdev" "/dev/fb1"
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+Now, reboot your Pi. Your console should show on the display.
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+
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+
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+5- Console touch calibration
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+
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+Edit, 2016.02.14 : A bug in the Debian 8 « Jessie » libsdl component prevents the touchpanel to work reliably in Pygame, from the console. For a workaround, please read this blog article if you are using Debian Jessie.
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+
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+Input devices get a device name which depends on the order of detection (/dev/input/eventX).
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+
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+These udev rules will create a symlink /dev/input/touchscreen pointing to the touch controller device. Reloading the driver or rebooting is necessary for the change to take effect.
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+
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+/etc/udev/rules.d/95-ads7846.rules
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+
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+SUBSYSTEM=="input", KERNEL=="event[0-9]*", ATTRS{name}=="ADS7846*", SYMLINK+="input/touchscreen"
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+/etc/udev/rules.d/95-stmpe.rules
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+
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+SUBSYSTEM=="input", ATTRS{name}=="stmpe-ts", ENV{DEVNAME}=="*event*", SYMLINK+="input/touchscreen"
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+Now, reboot.
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+
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+In order to use the touch panel with python, X, and to calibrate it, a few packages need loading :
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+
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+sudo apt-get install -y libts-bin evtest xinput python-dev python-pip
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+sudo pip install evdev
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+
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+# install ts_test with Quit button
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+sudo wget -O /usr/bin/ts_test http://tronnes.org/downloads/ts_test
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+sudo chmod +x /usr/bin/ts_test
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+To calibrate the touchscreen :
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+
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+sudo TSLIB_FBDEVICE=/dev/fb1 TSLIB_TSDEVICE=/dev/input/touchscreen ts_calibrate
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+6- X windows touch calibration
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+
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+xinput-calibrator provides a way to calibrate the touchpanel for X windows use. Install
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+
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+cd /tmp
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+wget http://tronnes.org/downloads/xinput-calibrator_0.7.5-1_armhf.deb
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+sudo dpkg -i -B xinput-calibrator_0.7.5-1_armhf.deb
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+rm xinput-calibrator_0.7.5-1_armhf.deb
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+Configure xinput-calibrator to autostart with X windows.
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+
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+sudo wget -O /etc/X11/Xsession.d/xinput_calibrator_pointercal https://raw.github.com/tias/xinput_calibrator/master/scripts/xinput_calibrator_pointercal.sh
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+echo "sudo /bin/sh /etc/X11/Xsession.d/xinput_calibrator_pointercal" | sudo tee -a /etc/xdg/lxsession/LXDE-pi/autostart
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+On first start of X windows a calibration window will be displayed.
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+
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+startx
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+Delete /etc/pointercal.xinput and restart X to recalibrate.
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+
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+### Touch panel rotation
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+
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+xinput-calibrator doesn’t handle touchpanels with X/Y swapped.
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+If your calibration results in swapped axis, add these config files.
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+
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+`/usr/share/X11/xorg.conf.d/99-ads7846-cal.conf`
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+
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+```
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+Section "InputClass"
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+        Identifier      "calibration"
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+        MatchProduct    "ADS7846 Touchscreen"
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+        Option  "SwapAxes"      "1"
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+        Option "InvertX" "true"
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+EndSection
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+```
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+
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+`/usr/share/X11/xorg.conf.d/99-stmpe-cal.conf`
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+
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+```
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+Section "InputClass"
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+        Identifier      "calibration"
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+        MatchProduct    "stmpe-ts"
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+        Option  "SwapAxes"      "1"
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+        Option "InvertX" "true"
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+EndSection
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+```
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+
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+### Disable screen blanking
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+
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+Edit /boot/cmdline.txt and add consoleblank parameter
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+
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+sudo nano /boot/cmdline.txt
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+add this to the end of the line :
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+
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+consoleblank=0
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+Edit /etc/kbd/config and edit display blanking parameters
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+
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+sudo nano /etc/kbd/config
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+Find these lines and replace the values with 0 (zero) :
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+
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+BLANK_TIME=0
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+POWERDOWN_TIME=0
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+8- Use the buttons
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+
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+The 3 buttons are very easy to use, once pinout is found.
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+
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+Here is a very simple python example :
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+
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+import RPi.GPIO as GPIO
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+
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+GPIO.setmode(GPIO.BOARD)
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+
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+GPIO.setup(12, GPIO.IN, pull_up_down = GPIO.PUD_UP)
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+GPIO.setup(16, GPIO.IN, pull_up_down = GPIO.PUD_UP)
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+GPIO.setup(18, GPIO.IN, pull_up_down = GPIO.PUD_UP)
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+
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+while True:
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+	if(GPIO.input(12) == 0):
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+	print(“Button 1 pressed”)
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+	if(GPIO.input(16) == 0):
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+	print(“Button 2 pressed”)
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+	if(GPIO.input(18) == 0):
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+	print(“Button 3 pressed”)
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+
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+GPIO.cleanup()
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+Save it to /home/pi/buttons.py (for an example) and execute it with
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+
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+python /home/pi/buttons.py
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+Once your are happy with your script, execute it at boot.
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+
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+sudo nano /etc/rc.local
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+Add your script before the exit line, with a « & » to make it non-blocking :
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+
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+python /home/pi/buttons.py &
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+You could find easily adaptable and more advanced scripts on my previous articles here and here.
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+
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+9- Conclusion
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+
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+This is nice little display with good view angles, a good brightness and 3 usefull buttons. It is also easy to set up, which is nice.
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+
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+Sources
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+- https://github.com/notro/fbtft/wiki/FBTFT-on-Raspian
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+- http://hardware-libre.fr/2015/07/review-guide-waveshare-sainsmart-3-2-inch-rpi-lcd/
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+- http://www.circuitbasics.com/raspberry-pi-touchscreen-calibration-screen-rotation/
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+- [Joy-it 3,2“ Touch-Display-V2 manual](http://files.voelkner.de/1300000-1399999/001380381-an-01-de-8_13_CM__3_2__TOUCH_DISPLAY_320X240_PX.pdf)

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_posts/2015-06-27-raspberry-pi-getting-started.markdown

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 ### First Boot
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-The username and password for Raspbian “squeeze” are:
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+The username and password for Raspbian “squeeze” or "Jessie" are:
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     $ Username: Pi
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     $ startx
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+To enter the Raspbian system settings:
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+
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+    $ sudo raspi-config
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+
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 ### Setting up Wi-Fi and Ethernet
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 To set up multiple wired and wi-fi connections using WICD-CURSES app, follow this [instructions](http://www.raspyfi.com/wi-fi-on-raspberry-pi-a-simple-guide/).
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-To set up a single wi-fi connection, follow this [instructions](http://www.howtogeek.com/167425/how-to-setup-wi-fi-on-your-raspberry-pi-via-the-command-line/)
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+To set up a single wi-fi connection on a raspberry pi 3 with Rasbian Jessie, add the following to the ```/etc/wpa_supplicant/wpa_supplicant.conf``` file:
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+
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+    network={
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+      ssid="network_name"
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+      psk="network_password"
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+    }
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+
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+For more information about setting the wifi, follow this [tutorial](http://www.howtogeek.com/167425/how-to-setup-wi-fi-on-your-raspberry-pi-via-the-command-line/).
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+
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+If you want to disable the wifi power management, so that the wifi doesnt turn of due to inactivity, change the file ```/etc/network/interfaces``` and add
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+```wireless-power off``` to your wifi connection:
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+
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+    auto wlan0
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+    allow-hotplug wlan0
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+    iface wlan0 inet dhcp
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+    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
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+    wireless-power off
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+    iface default inet dhcp
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+
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+You can also run the a command to turn wifi power management off until the next reboot:
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+    sudo iwconfig wlan0 power off
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+
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+After changing the network configurations, reboot your pi:
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+
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+    sudo reboot
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+
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+You can check your network status with the following commands. Check if ```inet addr``` is an *IP* in your network.
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+
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+    iwconfig
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+    iwconfig wlan0
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+    ifconfig
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+    ifconfig wlan0
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+
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+To manualy stop and restart your wifi connection, tun the following commands:
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+
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+    sudo ifdown wlan0
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+    sudo ifup wlan0
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 ### Installing Apps
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@@ -118,6 +159,13 @@ To [play a video with VLC thru a ssh session](http://stackoverflow.com/questions
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 [HPlayer](https://github.com/Hemisphere-Project/HPlayer) is a OSC controllable and GPU accelerated video player for Raspberry Pi with OpenGL shaders support.
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+### Prevent sleeping
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+
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+To prevent the Raspberry Pi from turning off the screen or entering in power saving mode, change the following configurations in the file ```/etc/kbd/config``` and the reboot.
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+    BLANK_TIME=0
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+    POWERDOWN_TIME=0
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+
121 169
 ## Misc
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 ### Useful commands