Development Environments Raspberry Pi ® Saman Amighi 04/2014 ® Raspberry Pi Foundation

Raspberry Pi Created by the Raspberry Pi Foundation Built to be an educational tool Credit Card size computer Linux Based Can be powered up with existing power supplies or batteries

Raspberry Pi Key Parts Ports USB (1/2) Keyboard Mouse Power (microUSB) SD Card HDMI or TV Video Network/LAN (100) Other GPIO pins Audio Jack Status LEDs

Raspberry Pi General Purpose Input Output (GPIO) Key Pins 1 – 3.3 V 2 – 5 V 6 – Ground 7 – GPIO4* 13 – GPIO21/27

Raspberry Pi First steps Purchase Raspberry Pi Purchase Components Create SD card Boot up initial Image Login

Next Steps Decide on a project Which project do you want to work on? Electronics – 3 hours - $50 Media Center – 3-5 hours - $30 Linux box with 100% up time – 1 hours - $0 Printer Server (CUPS) – 1 hours - $0 NAS – 3 hours - $100 Laptop (Atrix Lapdock) – 3 hours - $100

Development Enviroment Decide on a Development Enviroment Where? Work on the Raspberry PI Work on your own Computer How? Which editor to use Locally - VI, EMACS, NANO, etc. Remotely - Windows- Notepad, Mac – TextWrangler Required native SFTP and backups

Development Environment (cont’d) Decide on a Development Environment (cont’d) Programming Language C/C++ Python Shell Scripts (+Cron) PHP Etc Native Compilers/Processors GCC++ Python PHP Non-Native Ino/Arduino Ruby

Language Examples C/C++ C++ - Compiled Language case sensitive Difficult to work with strings Very specific on variable types Code char myString[10]; int iMyInt; strcpy(myString,”Hello”); Int myFunction(int ilocalInteger) { return ilocalInteger+1;}

C++ Example bool MPU9150::begin(mpu9150_gyr o_range_t g_rng, mpu9150_accel_range_t a_rng, byte addr) { Wire.begin(); address_ = addr; // Make sure the correct device is actually connected if (read8(MPU9150_WHO_AM_I) != MPU9150_ID) { return false; } // Set the gyro range write8((byte)MPU9150_GYRO _CONFIG, (byte)g_rng << 3); // Set the accel range write8((byte)MPU9150_ACCEL _CONFIG, (byte)a_rng << 3); // Set the clock source and take the device out of sleep mode write8((byte)MPU9150_PWR_ MGMT_1, 0x02); return true; }

Language Examples Python Python – Interpretive Language Case sensitive Indentation heavy (instead of using {} or terminators) Loose on type definitions ( 1 = “1”) Can be run interactively python func1.py OR python and use command line Print “Hello World” a = 5 mult(a)

Python Example Command Line $ python -c 'print "Hello World!"’ Code import re for test_string in [' ', 'ILL-EGAL']: if re.match(r'^\d{3}-\d{4}$', test_string): print test_string, 'is a valid US local phone number' else: print test_string, 'rejected'