pcDuino Presentation at SparkFun

Overview of pcDuino
www.pcduino.com
learn.linksprite.com

Agenda
 pcDuino: a platform open source software meets open
source hardware
 Programming under Ubuntu (linux)
 Arduino style programming ( C ) for pcDuino
 Python programming for pcDuino
 Java programming for pcDuino
 Go
 Cloud 9 IDE
 Scratch for pcDuino
 Project Showcase
 Programming under Android ICS
 Command line programming
 QT GUI

pcDuino: where open software meets open hardware
 pcDuino = mini PC + Arduino
 pcDuino is a kind of super Arduino with the brain
power of a mini PC.
 Existing Arduino shield can work on pcDuino.
 pcDuino can run Ubuntu. The desktop outputs from
HDMI. User can remotely access its desktop via VNC
(Network or OTG-USB).
 pcDuino has built-in Arduino style IDE environment.
It also supports programming in Python, Cloud 9
IDE, Java, Go-lang, Scratch, etc.
 pcDuino can run full Android ICS, and support
Arduino style hardware programming under Android.
 pcDuino is a server, a WiFi router, a printer
server, a IP-PBX, and more.
pcDuino is a platform where open software meets open
hardware.

pcDuino FamilypcDuino Lite pcDuino Lite WiFi pcDuino v1 pcDuino v2 pcDuino v3
CPU
Allwinner A101GHz
ARM Cortex A8
Allwinner A101GHz
ARM Cortex A8
Allwinner A101GHz
ARM Cortex A8
Allwinner A101GHz
ARM Cortex A8
GPU
OpenGL
ES2.0OpenVG 1.1
Mali 400 core
OpenGL
ES2.0OpenVG 1.1
Mali 400 core
OpenGL
ES2.0OpenVG 1.1
Mali 400 core
OpenGL
ES2.0OpenVG 1.1
Mali 400 core
DRAM 512MB 256MB 1GB 1GB
Storage
NO FlashmicroSD
card (TF) slot for up to
32GB
2GB FlashmicroSD
32GB
2GB Flash (4GB after
2/1/2014)microSD
32GB
2GB Flash (4GB after
2/1/2014)
microSD card (TF) slot
for up to 32GB
Video HDMI HDMI HDMI HDMI
OS Support
• Lbuntu 12.04
•Android
•Lbuntu 12.04
•Doesn’t support
Android
•Lbuntu 12.04
•Android
•Lbuntu 12.04
•Android
ExtensionInterface 2.54mm headers Arduino (TM) Headers 2.54mm headers Arduino (TM) Headers
NetworkInterface
•10/100Mbps RJ45
•USB WiFi extension
(not included)
WiFi, No Ethernet
•10/100Mbps RJ45
•USB WiFi extension
(not included)
•10/100Mbps RJ45
•WiFi
Power 5V, 2000mA 5V, 2000mA 5V, 2000mA 5V, 2000mA

Frizting Files
http://www.github.com/pcduino/frizting

pcDuino Presentation at SparkFun

pcDuino boot modes
 Default to boot from SD
 If there is no bootable image in SD, it will try to boot
from NAND.
 For Ubuntu OS, the system and data in NAND can be copied
to SD seamlessly.

Programming under Ubuntu (linux)

VNC to pcDuino through its USB-
OTG

 Two flavors
 Command line
 IDE
Arduino style programming ( C )

C Command line
Setup (one time)
If not already done, set up git. Do this using the command:
ubuntu@ubuntu:~$ sudo apt-get install git
Make sure you’re in your home folder by typing
ubuntu@ubuntu:~$ cd
ubuntu@ubuntu:~$ pwd
/home/Ubuntu
Now download the distribution from github by typing
ubuntu@ubuntu:~$ git clone https://github.com/pcduino/c_enviroment

C Command lineChange into the c_enviroment folder:
ubuntu@ubuntu:~$ cd c_enviroment
ubuntu@ubuntu:~/c_enviroment$ ls
Makefile hardware libraries output sample
Now run make to make the libraries and the examples with the following command:
ubuntu@ubuntu:~/c_enviroment$ make
Make[1]: Leaving directory `/home/ubuntu/c_enviroment/sample'
The resulting binary files are found in the output/test folder
ubuntu@ubuntu:~/c_enviroment$ cd output/test
ubuntu@ubuntu:~/c_enviroment/output/test$ ll
total 660
drwxrwxr-x 2 ubuntu ubuntu 4096 Apr 27 06:59 ./
drwxrwxr-x 3 ubuntu ubuntu 4096 Apr 27 06:49 ../
-rwxrwxr-x 1 ubuntu ubuntu 13868 Apr 27 06:58 adc_test*
-rwxrwxr-x 1 ubuntu ubuntu 28284 Apr 27 06:58 adxl345_test*
-rwxrwxr-x 1 ubuntu ubuntu 14209 Apr 27 06:58 interrupt_test*
-rwxrwxr-x 1 ubuntu ubuntu 13726 Apr 27 06:58 io_test*
-rwxrwxr-x 1 ubuntu ubuntu 13712 Apr 27 06:59 linker_button_test*
-rwxrwxr-x 1 ubuntu ubuntu 13907 Apr 27 06:59 linker_buzzer_test*
-rwxrwxr-x 1 ubuntu ubuntu 13689 Apr 27 06:59 linker_hall_sensor_test*
-rwxrwxr-x 1 ubuntu ubuntu 13760 Apr 27 06:59 linker_joystick_test*
-rwxrwxr-x 1 ubuntu ubuntu 13769 Apr 27 06:59 linker_led_bar_test*
-rwxrwxr-x 1 ubuntu ubuntu 13690 Apr 27 06:59 linker_led_test*
-rwxrwxr-x 1 ubuntu ubuntu 14290 Apr 27 06:59 linker_light_sensor_test*
““

C Command lineTo view the contents of a sample sketch, (this
example we’ll look at the contents of
linker_led_test.c) type:
ubuntu@ubuntu:~/c_enviroment/sample$ cat
linker_led_test.c
/*
* LED test program
*/
#include <core.h>
int led_pin = 1;
void setup()
{
if(argc != 2){
goto _help;
}
led_pin = atoi(argv[1]);
if((led_pin < 0) || (led_pin > 13)){
goto _help;
}
pinMode(led_pin, OUTPUT);
return;
_help:
printf("Usage %s LED_PIN_NUM(0-13)n", argv[0]);
exit(-1);
}
void loop()
{
digitalWrite(led_pin, HIGH); // set the LED
on
delay(1000); // wait for a second
digitalWrite(led_pin, LOW); // set the LED
off
delay(1000); // wait for a second
}

Creating Your Own Sketch
ubuntu@ubuntu:~/c_enviroment/sample$ nano button_led.c
An empty nano screen should appear.
Copy and paste the following code into it. (Remember to paste in nano at the cursor,
just right click the mouse button).
#include <core.h> // Required first line to run on pcDuino
int ledPin = 8;
int buttonPin = 7;
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}

void loop(){
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
}
else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}

Modify the Makefile and Compile
ubuntu@ubuntu:~/c_enviroment/sample$ nano Makefile
You will see a section that lists all the OBJS something like:
OBJS = io_test adc_test pwm_test spi_test adxl345_test serial_test liquidcrystal_i2c
liquidcrystal_spi interrupt_test tone_test
OBJS += linker_led_test linker_potentiometer_test linker_tilt_test linker_light_sensor_test
linker_button_test
OBJS += linker_touch_sensor_test linker_magnetic_sensor_test linker_temperature_sensor_test
linker_joystick_test
OBJS += linker_rtc_test linker_sound_sensor_test linker_buzzer_test linker_hall_sensor_test
linker_led_bar_test linker_relay_test
OBJS += pn532_readAllMemoryBlocks pn532readMifareMemory pn532readMifareTargetID
pn532writeMifareMemory

Creating Your Own SketchWe’re going to add a line to the end of this with the name of the
scketch we just created:
OBJS += button_led
Save the file and exit nano using <CTRL>X with a y and <enter>.
We now run make by typing:
ubuntu@ubuntu:~/c_enviroment/sample$ make
You should see a whole bunch of text with the end being:
button_led.c -o ../output/test/button_led ../libarduino.a
If all went well, you can go to the output/test folder and find your executable you have created:
ubuntu@ubuntu:~/c_enviroment/sample$ cd ../output/test/
ubuntu@ubuntu:~/c_enviroment/output/test$ ll
total 676
drwxrwxr-x 2 ubuntu ubuntu 4096 Apr 27 07:51 ./
drwxrwxr-x 3 ubuntu ubuntu 4096 Apr 27 06:49 ../
-rwxrwxr-x 1 ubuntu ubuntu 13868 Apr 27 07:51 adc_test*
-rwxrwxr-x 1 ubuntu ubuntu 28284 Apr 27 07:51 adxl345_test*
-rwxrwxr-x 1 ubuntu ubuntu 13668 Apr 27 07:51 button_led*
“..(not showing rest of listing here)

Creating Your Own SketchRun Your Sketch
To run it, once you have wired up a switch and led to the right pins, type:
ubuntu@ubuntu:~/c_enviroment/output/test$ ./button_led
To stop the program, <Ctrl>C
A Quick Re-Cap
Add #include <core.h> to the top of your sketch.
Create your sketch in the samples folder (if your familiar with linux,
makefiles, and compiling code, you could set up your own)
Add the filename to the Makefile in the samples folder in the OBJS section
without the .c
Run make
Run the executable from the output/test folder.
You can introduce command line arguments into your sketch to make it more
transportable.

Digital Humidity and Temperature
Sensor

Extends to 4 UARTS
http://jbvsblog.blogspot.com/2013/09/pcduino-extends-to-4-
uarts.html

Cottonwood:UHF ultra-distance RFID Reader

Python
ubuntu@ubuntu:~/python-pcduino/Samples/blink_led$ more blink_led.py
#!/usr/bin/env python
# blink_led.py
# gpio test code for pcduino ( http://www.pcduino.com )
#
import gpio
import time
led_pin = "gpio2"
def delay(ms):
time.sleep(1.0*ms/1000)
def setup():
gpio.pinMode(led_pin, gpio.OUTPUT)
def loop():
while(1):
gpio.digitalWrite(led_pin, gpio.HIGH)
delay(200)

pcDuino as Networked Device to
feed data to Xively (Internet of
Things)

Smart Garage powered by pcDuino

OpenCV
def process(infile):
image = cv.LoadImage(infile);
if image:
faces = detect_object(image)
im = Image.open(infile)
path = os.path.abspath(infile)
save_path = os.path.splitext(path)[0]+"_face"
try:
os.mkdir(save_path)
except:
pass
if faces:
draw = ImageDraw.Draw(im)
count = 0
for f in faces:
count += 1
draw.rectangle(f, outline=(255, 0, 0))
a = im.crop(f)
file_name =
os.path.join(save_path,str(count)+".jpg")
# print file_name
a.save(file_name)
drow_save_path =
os.path.join(save_path,"out.jpg")
im.save(drow_save_path, "JPEG", quality=80)
else:
print "Error: cannot detect faces on %s" %
infile
if __name__ == "__main__":
process("./opencv_in.jpg")

OpenCV
#!/usr/bin/env python
#coding=utf-8
import os
from PIL import Image, ImageDraw
import cv
def detect_object(image):
grayscale = cv.CreateImage((image.width, image.height), 8, 1)
cv.CvtColor(image, grayscale, cv.CV_BGR2GRAY)
cascade = cv.Load("/usr/share/opencv/haarcascades/haarcascade_frontalface_alt_tree.xml")
rect = cv.HaarDetectObjects(grayscale, cascade, cv.CreateMemStorage(), 1.1, 2,
cv.CV_HAAR_DO_CANNY_PRUNING, (20,20))
result = []
for r in rect:
result.append((r[0][0], r[0][1], r[0][0]+r[0][2], r[0][1]+r[0][3]))
return result

Go Langpackage main
import (
"fmt"
"./gpio"
"time"
)
func main() {
g, err := gpio.NewGPIOLine(7,gpio.OUT)
if err != nil {
fmt.Printf("Error setting up GPIO %v: %v", 18, err)
return
}
blink(g, 100)
g.Close()
}
func blink(g *gpio.GPIOLine, n uint) {
fmt.Printf("blinking %v time(s)n", n)
for i := uint(0); i < n; i++ {
g.SetState(true)
time.Sleep(time.Duration(1000) * time.Millisecond)
g.SetState(false)
time.Sleep(time.Duration(1000) * time.Millisecond)
}
}

Cloud 9 IDE
 Cloud9 IDE is an online development environment
for Javascript and Node.js applications as well
as HTML, CSS, PHP, Java, Ruby and 23 other
languages.
 You're programming for the web, on the web.
Teams can collaborate on projects and run them
within the browser. When you're finished,
deploy it—and you're done!

Scratch
$sudo apt-get install pcduino-scratch

Blink LED (Scratch for
pcDuino)

Press Button to Turn on LED
(Scratch for pcDuino)

Touch the Finish Line (Scratch for
pcDuino)

Play Pong with Scratch for
pcDuino

pcDuino as banaba piano using
Scratch for pcDuino

Home Automation：IP controllable LED
 Many users are asking if the hardware part can be
programmed together with the Ubuntu linux?
 Sure. This is the beauty of pcDuino. The Arduino compatible hardware is a native part
of the OS.
 pcDuino includes Ethernet port, USB Wifi dongle, so there is no
need for Ethernet shield, Ethernet shield , USB host shield, MP3
shields and so on.
Now, we are going to implement a TCP/IP
socket server on pcDuino to listen to the
data coming from client.
When it receives character ’O', it will
turn on the LED, and when it receives ‘F‛,
it will turn on the LED. No actions if
receive something else.

Home Automation：IP controllable LED#include ‚sys/socket.h‛
#include ‚netinet/in.h‛
#include ‚arpa/inet.h‛
#include ‚sys/types.h‛
int led_pin = 2;
int listenfd = 0, connfd = 0;
int n;
struct sockaddr_in serv_addr;
char sendBuff[1025];
time_t ticks;
void loop()
{
n = read(connfd, sendBuff, strlen(sendBuff) );
if(n>0)
{
if(sendBuff[0]=='O') digitalWrite(led_pin,
HIGH); // set the LED on
if(sendBuff[0]=='F') digitalWrite(led_pin,LOW);
// set the LED off
}
}
void setup()
{
led_pin = 2;
pinMode(led_pin, OUTPUT);
listenfd = socket(AF_INET, SOCK_STREAM, 0);
memset(serv_addr, '0', sizeof(serv_addr));
memset(sendBuff, '0', sizeof(sendBuff));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(5000);
bind(listenfd, (struct sockaddr*) serv_addr, sizeof(serv_addr));
listen(listenfd, 10);
connfd = accept(listenfd, (struct sockaddr*)NULL, NULL);
}

pcDuino as 3D printer control
console

Two flavors to program under Android
 There are two flavors to program under
Android:
 Command line
 QT5 GUI

QT5 GUI
We can copy the apk though pcDuino OTG or
SD card to pcDunio and install it there.

Connect with pcDuino
Facebook.com/linksprit
e

pcDuino Presentation at SparkFun

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