Kenneth: /* GPIO */

2016-12-05T14:54:52Z

GPIO

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== pcDuino Lite ==

pcDuino Lite - http://www.pcduino.com/pcduino-lite/

Features:
* 1GHz ARM Cortex A8 CPU
* GPU: OpenGL ES2.0, OpenVG 1.1 Mali 400 core
* 512 MB DRAM
* Onboard Storage: NO Flash, microSD card (TF) slot for up to 32GB
* Arduino-Style Peripheral Headers (Adapter Needed for Shield Form-Factor)
* HDMI Video Output
* Linux3.0 + Ubuntu12.04 Supported
* 0.1" Spaced GPIO Headers
* RJ45 Ethernet Connection
* Power Requirements: 2A @ 5VDC
* API to access the following interfaces:
** UART
** ADC
** PWM
** GPIO
** I2C
** SPI
* Program in C, C++ with GNU tool chain
* Python

http://www.pcduino.com/wp-content/uploads/2013/10/pcduino_lite.jpg

== SD Image ==

Download Image for pcDuino Lite ETH: http://www.linksprite.com/?page_id=839 <s>http://www.pcduino.com/images-for-pcduino-lite-eth/</s>
* Ubuntu SD Bootable image https://s3.amazonaws.com/pcduino/Images/lite-eth/pcduino-lite_ubuntu_20130929.img
* Write image with win32diskimagwriter - https://s3.amazonaws.com/pcduino/Tools/win32diskimager-v0.7-binary.zip

Default password:
user: ubuntu
pass: ubuntu
with sudo privileges

Update:
sudo board-config.sh # select “update” -> all

== Purchase ==

* SparkFun Electronics - pcDuino Lite - Dev Board - DEV-12077 ($40 + $4.50 shipping) - https://www.sparkfun.com/products/12077
* Amazon - pcDuino Lite ($43 + $4.50 shipping) - http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=pcDuino%20Lite

== pcDuino Comparison Chart ==

pcDuino Family - http://www.pcduino.com/pcduino-family/
* pcDuino Lite
* pcDuino Lite WiFi
* pcDuino v1
* pcDuino v2
* pcDuino3

== Update pcDuino ==

Update pcDuino specific:
sudo board-config.sh
# select "update" -> "all"

Update packages: (May have to comment out wiimu repo)
sudo apt-get update
sudo apt-get upgrade

== Boot No GUI ==

For the latest bootable SD image (31052013), you can boot into terminal with:

sudo mv /etc/init/lightdm.conf /etc/init/lightdm.conf.nostart

This way, lightdm is disabled on boot. Still after booting into terminal you can start desktop with the command "lightdm" (without quotes of course)

To switch back to autostart of desktop:

sudo mv /etc/init/lightdm.conf.nostart /etc/init/lightdm.conf

References:
* Boot to console, without GUI? - http://pcduino.com/forum/index.php?topic=3645.0

== GPIO ==

Load GPIO module:
/sbin/modprobe gpio

Pins:
<pre>
gpio0
gpio1
gpio2
gpio3
gpio4
gpio5
gpio6
gpio7
gpio8
gpio9
gpio10
gpio11
gpio12
gpio13
gpio14
gpio15
gpio16
gpio17
gpio18
gpio19
gpio20
gpio21
gpio22
gpio23
</pre>

Set mode:
# input
echo 0 > /sys/devices/virtual/misc/gpio/mode/gpio1
# output
echo 1 > /sys/devices/virtual/misc/gpio/mode/gpio1

Set level:
# low
echo 0 > /sys/devices/virtual/misc/gpio/pin/gpio1
# high
echo 1 > /sys/devices/virtual/misc/gpio/pin/gpio1

References:
* Programming the pcDuino - learn.sparkfun.com - https://learn.sparkfun.com/tutorials/programming-the-pcduino/accessing-gpio-pins
* Programming the pcDuino - learn.sparkfun.com - https://learn.sparkfun.com/tutorials/programming-the-pcduino

== Pins ==

https://cdn.sparkfun.com/r/600-600/assets/d/7/c/4/0/51683a30ce395f5524000001.png

https://cdn.sparkfun.com/r/600-600/assets/2/4/9/a/2/51549986ce395f9554000000.png

== Issues ==

=== apt-get update expected pcduino but got ===

Error:
# apt-get update
...
W: Conflicting distribution: http://www.wiimu.com pcduino Release (expected pcduino but got )

Solution:
* Edit /etc/apt/sources.list and comment out the wiimu lines
#deb http://www.wiimu.com:8020/pcduino/ pcduino main
#deb-src http://www.wiimu.com:8020/pcduino/ pcduino main

References:
* Install ROS Groovy on pcDuino » pcDuino - http://www.pcduino.com/install-ros-groovy-on-pcduino/

=== mac changes every reboot ===

Edit /etc/network/interfaces and add:
iface eth0 inet dhcp
hwaddress ether xx:xx:xx:xx:xx:xx
auto eth0

References:
* Fix Ethernet MAC address · Issue #47 · cubieplayer/Cubian - https://github.com/cubieplayer/Cubian/issues/47
* [ubuntu] MAC address changes after every reboot - http://ubuntuforums.org/showthread.php?t=1647460

=== Please set the screen resolution ===

When trying to exit the board-config.sh from a remote SSH connection you may get the following warning, which won't let you exit:
Please set the screen resolution

As far as I can tell, this would have to be fixed from a console session connected to HDMI. So just kill the SSH connection and connect again.

== keywords ==

[[Category:Linux]]
[[Category:Anites]]

PcDuino Lite - Revision history

Kenneth: /* GPIO */