The document provides a comprehensive guide on setting up and using a Raspberry Pi, detailing its specifications, initial setup instructions, and introductory projects. It covers different model features, how to create an image on an SD card, and includes basic Python scripts for GPIO and analog input usage. Additionally, it discusses the I2C and SPI protocols, with examples for interfacing with hardware components.

1. Getting Started with
Raspberry Pi
Tom Paulus
www.tompaulus.com
@tompaulus

2. Recommended

3. Books

4. Hardware

5. Model B

6. Model A

7. Model B

8. Raspberry

9. Pi
Text
“Take

10. a

11. bite!”
CPU
Broadcom ARM11
SoC
Broadcom ARM11
SoC
Clock
Speed
Up to 1GHz
ClockSpeed*
Up to 1GHz
ClockSpeed*
Memory 256 MB 512 MB
USB 1 USB Port 2 USB Ports
Network None Onboard Ethernet
Model

12. BModel

13. A

15. Arduino

16. UNO

18. :

20. Arduino

21. MEGA

23. :

26. Raspberry

27. Pi

29. UNO MEGA DUE Pi Model A Pi Model B
Operating
Voltage
SRAM
FLASH-
Memory
Clock Speed
USB Host
Network
Audio /Video
Current I/O
pins
Digital I/O Pins
Analog Input
Pins
Price
5V 5V 3.3V 3.3V 3.3V
2 KB 8 KB 96 KB 265 MB 512 MB
32 KB 256 KB 512 KB up to 64 MB up to 64 MB
16 MHz 16 MHz 84 MHz 700 MHz* 700 MHz*
n/a n/a 1 1 2
n/a n/a n/a n/a
10/100 wired
Ethernet RJ45
n/a n/a n/a
HDMI, Composite
Video,
TRS-audio jack
HDMI, Composite
Video,
TRS-audio jack
40 mA 40 mA total 130 mA 2 to 16 mA 2 to 16 mA
14 (6 PWM) 54 (15 PWM) 54 (12 PWM) 17 (1 PWM) 17 (1 PWM)
6 16
12
2DAC Analog Out
0* 0*
$30 $59 $50 $25 $35

30. Initial Setup

31. http://www.raspberrypi.org/downloads

32. Recommended

33. SD

34. Cards
•Class

35. 4

36. Minimum
•2

37. GB

38. or

39. More
•Major

40. Brands

41. are

42. Better!

43. Creating Your Image
1. Download and Unzip the .img from www.raspberrypi.com
2. Format the SD Card to clear all Data
Windows
Users:
Use
Win32DiskImager
Mac Users:
in a Terminal--
sudo diskutil unmount /dev/disk1s1
sudo dd bs=1m if=(Insert Location of .img) of=(SD Card)
sync
sudo diskutil eject /dev/rdisk1

45. Demo

46. GPIO

48. sudo apt-get install python-dev python-pip
sudo easy_install -U distribute
sudo pip install RPi.GPIO
Preparing

49. Python

50. Simple

51. Blink

52. App

53. #! /usr/bin/python
import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
#use the common numeration,
#also the one found on the Adafruit Cobbler
led = 25
delay = .5
GPIO.setup(led, GPIO.OUT)
#Set 'led' as and Output
while True:
GPIO.output(led, True) #led On
time.sleep(delay) #wait 'delay' seconds
GPIO.output(led, False) #led off
time.sleep(delay) #wait another 'delay' seconds

55. Demo

56. Analogue

57. Input

58. MCP3008 8-Channel 10-Bit ADC With SPI Interface
Ra!berryPi
wi ADC

59. SPI requires four signals:
clock (SCLK)
master output/slave input (MOSI)
master input/slave output (MISO)
slave select (SS) or (CS) chip-select
Ra!berryPi
Se#al Pe#pheral Interface Bus - SPI

60. pi@raspberrypi ~ $ cat /etc/modprobe.d/raspi-blacklist.conf
# blacklist spi and i2c by default (many users don't need them)
blacklist spi-bcm2708
blacklist i2c-bcm2708
Loading Kernel Modules:
Edit the raspi-blacklist.conf, so that the spi module gets loaded,
Reboot, and confirm with lsmod that ‘spidev’ and ‘spi_bcm2708’ are now loaded and
ls /dev/spi* shows two spi devices: /dev/spidev0.0 and /dev/spidev0.1
Installing Dependencies:
sudo apt-get install python-dev git-core
Install Python bindings for Linux SPI access through spidev:
cd ~
git clone git://github.com/doceme/py-spidev
cd py-spidev/
sudo python setup.py install
... which creates /usr/local/lib/python2.7/dist-packages/spidev.so
SPI

61. I2C
SPI

62. IN =[0000 0001][1CNL ----][---- ----]
(8+channel) 4
OUT=[---- ----][---- -XXX][XXXX XXXX] (10bit)
((r[1] 3) 8) + r[2]

63. IN =[0000 0001][1CNL ----][---- ----]
(8+channel) 4
OUT=[---- ----][---- -XXX][XXXX XXXX]
r[0] ((r[1] 3) 8) + r[2]
r = spi.xfer2( [1, (8+chnnl)4, 0] )
return ((r[1] 3) 8) + r[2]

64. #! /usr/bin/python
#Written By Tom Paulus, @tompaulus, www.tompaulus.com
import time
import spidev
import RPi.GPIO as GPIO
spi = spidev.SpiDev()
light_adc = 7
statusLED = 25
GPIO.setmode(GPIO.BCM)
GPIO.setup(statusLED, GPIO.OUT)
print Press CTRL+Z to exit
def analogRead(port):
Read the given ADC port and preform the necessary shifting of bits
spi.open(0, 0)
if (port 7) or (port 0):
print 'analogRead -- Port Error, Must use a port between 0 and 7'
return -1
r = spi.xfer2([1, (8 + port) 4, 0])
value = ((r[1] 3) 8) + r[2]
spi.close()
return value
while True:
GPIO.output(statusLED, True)
print analogRead(light_adc)
time.sleep(.125)
GPIO.output(statusLED, False)
time.sleep(.175)