Difference between revisions of "Raspberry Pi"

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* http://www.raspbian.org/
  
* http://www.raspbian.org/
 
* http://elinux.org/RaspberryPiBoard
  
* http://elinux.org/RaspberryPiBoard
  +
* http://www.element14.com/community/groups/raspberry-pi
  ⚫
* http://elinux.org/RPi_VerifiedPeripherals
  +
Hardware:
  +
* http://elinux.org/RPi_Low-level_peripherals
  +
* http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf
  +
* http://www.raspberrypi.org/wp-content/uploads/2012/04/Raspberry-Pi-Schematics-R1.0.pdf
  +
==Startup==
  +
Remotely: provide DHCP over Ethernet
  ⚫
<br>Access via ssh, Username: pi Password: raspberry
  +
<br>First time, the device propose to run [http://elinux.org/RPi_raspi-config raspi-config]
  +
sudo raspi-config
  +
<br>Then, better to renew SSH server keys, see [http://elinux.org/RPi_Remote_Access RPi remote access]
  +
sudo rm /etc/ssh/ssh_host_* && sudo dpkg-reconfigure openssh-server
   
  +
sudo apt-get update
⚫
Username: pi Password: raspberry
  
   
  +
==Wi-Fi==
⚫
* http://elinux.org/RPi_Remote_Access
  
  +
Using [http://www.element14.com/community/docs/DOC-48541/l/wi-pi-wlan-usb-module-for-the-raspberry-pi Wi-Pi]
  +
<br>See [http://www.element14.com/community/servlet/JiveServlet/downloadBody/49107-102-1-257014/Wi_Pi.User_Manual.pdf user manual] for Raspbian.
  +
<br>Edit /etc/network/interfaces and add wlan0 section similar to:
  +
auto wlan0
  +
iface wlan0 inet dhcp
  +
wpa-ssid <name of your WiFi network>
  +
wpa-psk <password of your WiFi network>
  +
Then
  +
sudo /etc/init.d/networking restart
  +
==NFC==
  +
apt-get install git autoconf libtool gcc libusb-dev
  +
apt-get install dpkg-dev debhelper dh-autoreconf
  +
git clone https://code.google.com/p/libnfc/
  +
cd libnfc
  +
dpkg-buildpackage -b -uc -us
  +
cd ..
  +
dpkg -i *deb
  +
For a SCL3711:
  +
modprobe -r pn533
  +
echo blacklist pn533 > /etc/modprobe.d/pn533-blacklist.conf
  +
  +
==GPIO==
  +
RPi-GPIO is already pre-installed on Raspbian
  +
dpkg -l|grep gpio
  +
ii python-rpi.gpio 0.4.1a-1 armhf Python GPIO module for Raspberry Pi
  +
ii python3-rpi.gpio 0.4.1a-1 armhf Python 3 GPIO module for Raspberry Pi
  +
Usage: https://code.google.com/p/raspberry-gpio-python/wiki/BasicUsage
  +
  +
Refs:
  +
* http://elinux.org/RPi_BCM2835_GPIOs
  +
* http://elinux.org/RPi_Low-level_peripherals#General_Purpose_Input.2FOutput_.28GPIO.29
  +
  +
==SPI==
  +
See http://elinux.org/RPi_Low-level_peripherals#General_Purpose_Input.2FOutput_.28GPIO.29 for pinout
  +
===Enable===
  +
Edit /etc/modprobe.d/raspi-blacklist.conf and comment:
  +
#blacklist spi-bcm2708
  +
Reboot
  +
<br>There should now be some /dev/spi*
  +
$ ls /dev/spi*
  +
/dev/spidev0.0 /dev/spidev0.1
  +
===Test===
  +
wget "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob_plain;f=Documentation/spi/spidev_test.c" -O spidev_test.c
  +
gcc -o spidev_test spidev_test.c
  +
sudo ./spidev_test -D /dev/spidev0.0
  +
We should get a bunch of zeroes.
  +
<br>Now, be very careful!!
  +
<br>Shortcut GPIO9(MISO)(pin21) and GPIO10(MOSI)(pin19).
  +
<br>Check on [https://www.modmypi.com/blog/raspberry-pi-gpio-cheat-sheet a pinout diagram] first...
  +
<br>And run again the command, now we should get some hex dump about dead beef and bad food ;-)
  +
sudo ./spidev_test -D /dev/spidev0.0
  +
If test fails, see here for updating stuffs:
  +
* http://www.brianhensley.net/2012/07/getting-spi-working-on-raspberry-pi.html
  +
* see also [http://mitchtech.net/wp-content/uploads/2012/08/raspi_arduino_spi.png SPI pinout] example with an Arduino
  +
===SPI-Python===
  +
* http://louisthiery.com/spi-python-hardware-spi-for-raspi/
  +
* https://github.com/lthiery/SPI-Py
  +
Warning: at time of writing, functions described in the [https://github.com/lthiery/SPI-Py/wiki/Functions wiki] didn't match code anymore.
  +
  +
wget https://raw.github.com/lthiery/SPI-Py/master/spi.c
  +
wget https://raw.github.com/lthiery/SPI-Py/master/setup.py
  +
apt-get install python2.7-dev
  +
python setup.py build
  +
Result spi.so is in build/lib.linux-armv6l-2.7/spi.so to be dropped in python path
  +
  +
===SPI-NFC===
  +
tests...
  +
  +
max speed achieved with debug on: 7.8MHz (PN532 spec says 5MHz)
  +
LIBNFC_DEFAULT_DEVICE=pn532_spi:/dev/spidev0.0:7800000 LIBNFC_LOG_LEVEL=3 utils/nfc-list
  +
max speed achieved without debug: 480kHz
  +
LIBNFC_DEFAULT_DEVICE=pn532_spi:/dev/spidev0.0:480000 LIBNFC_LOG_LEVEL=2 utils/nfc-list
  +
===Raspdancer===
  +
See [[Raspdancer]]
  +
  +
===Untested===
  +
modprobe spidev??

Latest revision as of 17:36, 4 June 2013

Links

Hardware:

Startup

Remotely: provide DHCP over Ethernet
Access via ssh, Username: pi Password: raspberry
First time, the device propose to run raspi-config 

sudo raspi-config


Then, better to renew SSH server keys, see RPi remote access 

sudo rm /etc/ssh/ssh_host_* && sudo dpkg-reconfigure openssh-server

sudo apt-get update

Wi-Fi

Using Wi-Pi
See user manual for Raspbian.
Edit /etc/network/interfaces and add wlan0 section similar to: 

auto wlan0
iface wlan0 inet dhcp
wpa-ssid <name of your WiFi network>
wpa-psk <password of your WiFi network>

Then 

sudo /etc/init.d/networking restart

NFC

apt-get install git autoconf libtool gcc libusb-dev
apt-get install dpkg-dev debhelper dh-autoreconf
git clone https://code.google.com/p/libnfc/
cd libnfc
dpkg-buildpackage -b -uc -us
cd ..
dpkg -i *deb

For a SCL3711: 

modprobe -r pn533
echo blacklist pn533 > /etc/modprobe.d/pn533-blacklist.conf

GPIO

RPi-GPIO is already pre-installed on Raspbian 

dpkg -l|grep gpio
ii  python-rpi.gpio                       0.4.1a-1                   armhf        Python GPIO module for Raspberry Pi
ii  python3-rpi.gpio                      0.4.1a-1                   armhf        Python 3 GPIO module for Raspberry Pi

Usage: https://code.google.com/p/raspberry-gpio-python/wiki/BasicUsage

Refs:

SPI

See http://elinux.org/RPi_Low-level_peripherals#General_Purpose_Input.2FOutput_.28GPIO.29 for pinout

Enable

Edit /etc/modprobe.d/raspi-blacklist.conf and comment: 

#blacklist spi-bcm2708

Reboot
There should now be some /dev/spi* 

$ ls /dev/spi*
/dev/spidev0.0 /dev/spidev0.1

Test

wget "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob_plain;f=Documentation/spi/spidev_test.c" -O spidev_test.c
gcc -o spidev_test spidev_test.c
sudo ./spidev_test -D /dev/spidev0.0

We should get a bunch of zeroes.
Now, be very careful!!
Shortcut GPIO9(MISO)(pin21) and GPIO10(MOSI)(pin19).
Check on a pinout diagram first...
And run again the command, now we should get some hex dump about dead beef and bad food ;-) 

sudo ./spidev_test -D /dev/spidev0.0

If test fails, see here for updating stuffs:

SPI-Python

Warning: at time of writing, functions described in the wiki didn't match code anymore. 

wget https://raw.github.com/lthiery/SPI-Py/master/spi.c
wget https://raw.github.com/lthiery/SPI-Py/master/setup.py
apt-get install python2.7-dev
python setup.py build

Result spi.so is in build/lib.linux-armv6l-2.7/spi.so to be dropped in python path

SPI-NFC

tests...

max speed achieved with debug on: 7.8MHz (PN532 spec says 5MHz) 

LIBNFC_DEFAULT_DEVICE=pn532_spi:/dev/spidev0.0:7800000 LIBNFC_LOG_LEVEL=3 utils/nfc-list

max speed achieved without debug: 480kHz 

LIBNFC_DEFAULT_DEVICE=pn532_spi:/dev/spidev0.0:480000 LIBNFC_LOG_LEVEL=2 utils/nfc-list

Raspdancer

See Raspdancer

Untested

modprobe spidev??
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