marcsauter/buzzer

Pitch buzzer

Pitch Buzzer / Ticker

Raspberry Pi

root-Filesystem

First of all enlarge the root filesystem with raspi-config, to use the whole size of the SD card.

Packages

Buzzer:

Raspbian

apt-get install mercurial \
    libgles1-mesa-dev \
    libgles2-mesa-dev \
    libperl-dev \
    libgtk2.0-dev

RHEL:

yum install pango.x86_64 \
    pango-devel.x86_64 \ 
    gdk-pixbuf2.x86_64 \
    gdk-pixbuf2-devel.x86_64 \
    gtk2-devel.x86_64 

Ticker:

Console

For the Ticker you will need the /dev/ttyAMA0, which is in use for the serial console. Remove appropriate console entry in /boot/cmdline.txt and reboot.

change:

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

to:

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

see also: http://0pointer.de/blog/projects/serial-console.html

WLAN

/etc/network/interfaces

allow-hotplug wlan0
iface wlan0 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

/etc/wpa_supplicant/wpa_supplicant.conf

network={
  ssid="INSERT"
  psk="INSERT"
  proto=RSN
  key_mgmt=WPA-PSK
  pairwise=CCMP
  auth_alg=OPEN
}

Golang

Install the latest go version from:

• http://dave.cheney.net/unofficial-arm-tarballs

  tar -C /usr/local -xzf go1.5.2.linux-arm.tar.gz

$HOME/.profile

if [ -d /usr/local/go/bin ]; then
    PATH="/usr/local/go/bin:$PATH"
fi

export PATH
export GOPATH=$HOME/golang
export CDPATH=$HOME/golang/src/gitlab.com/marcsauter

Packages

Buzzer:

• github.com/luismesas/goPi/piface
• github.com/luismesas/goPi/spi
• github.com/mattn/go-gtk

Ticker:

• github.com/tarm/serial

PiFace Digital 2

• https://godoc.org/github.com/luismesas/goPi/piface
• http://www.piface.org.uk/assets/docs/PiFace-Digital2_getting-started.pdf

Ticker

Pin Assignment:

Ticker Plug RJ11/RS-485 (front view)
                                           ----------
RX  / connect to GPIO 15 (RXD)   1 |-       |
TX  / connect to GPIO 14 (TXD)   2 |-       ---
DTR / not connected              3 |-         |
GND / connect to GND             4 |-         |
RTS / not connected              5 |-       ---
not used                         6 |-       |
                                           ----------

Raspi Plug GPIO (top view):
   o     o     o     o    o-- 3.3V
-------------------
| RXD | TXD | GND |  o    o-- 5V
-------------------

Web service

buzzer-ws on Google Appengine