Difference between revisions of "Raspberry Pi"
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m (→SPI) |
m (→SPI) |
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$ ls /dev/spi* |
$ ls /dev/spi* |
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/dev/spidev0.0 /dev/spidev0.1 |
/dev/spidev0.0 /dev/spidev0.1 |
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| − | + | Test: |
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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 |
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 |
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| − | Edit the file to point to /dev/spidev0.0 |
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gcc -o spidev_test spidev_test.c |
gcc -o spidev_test spidev_test.c |
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| − | sudo ./spidev_test |
+ | sudo ./spidev_test -D /dev/spidev0.0 |
We should get a bunch of zeroes. |
We should get a bunch of zeroes. |
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<br>Now, be very careful!! Shortcut GPIO9(MISO)(pin21) and GPIO10(MOSI)(pin19). Check on [https://www.modmypi.com/blog/raspberry-pi-gpio-cheat-sheet a pinout diagram] first... |
<br>Now, be very careful!! Shortcut GPIO9(MISO)(pin21) and GPIO10(MOSI)(pin19). Check on [https://www.modmypi.com/blog/raspberry-pi-gpio-cheat-sheet a pinout diagram] first... |
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<br>And run again the command, now we should get some hex dump about dead beef and bad food ;-) |
<br>And run again the command, now we should get some hex dump about dead beef and bad food ;-) |
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| + | sudo ./spidev_test -D /dev/spidev0.0 |
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| − | + | If test fails, see here for updating stuffs: |
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* http://www.brianhensley.net/2012/07/getting-spi-working-on-raspberry-pi.html |
* http://www.brianhensley.net/2012/07/getting-spi-working-on-raspberry-pi.html |
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* see also [http://mitchtech.net/wp-content/uploads/2012/08/raspi_arduino_spi.png SPI pinout] example with an Arduino |
* see also [http://mitchtech.net/wp-content/uploads/2012/08/raspi_arduino_spi.png SPI pinout] example with an Arduino |
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Revision as of 20:35, 25 March 2013
Links
- Raspberry Pi on Wikipedia
- Raspbian on Wikipedia
- http://www.raspberrypi.org/
- http://www.raspbian.org/
- http://elinux.org/RaspberryPiBoard
- http://www.element14.com/community/groups/raspberry-pi
- http://elinux.org/RPi_VerifiedPeripherals
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
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
SPI
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:
- http://www.brianhensley.net/2012/07/getting-spi-working-on-raspberry-pi.html
- see also SPI pinout example with an Arduino
With Python: