Arduino - Reference
Reference Language (extended) Libraries Comparison Board Language Reference See the extended reference for more advanced features of the Arduino languages and the libraries page for interfacing with particular types of hardware Arduino programs can be divided in three main parts: structure, values (variables and constants), and functions
Arduino Programming Language - MR FERGUSON
Introduction to Haptics Arduino Programming Language Allison M Okamura Stanford University (optional material for beginning programmers)
Arduino : Introduction & Programming
setup : It is called only when the Arduino is powered on or reset It is used to initialize variables and pin modes • loop : The loop functions runs continuously till the device is powered off The main logic of the code goes here Similar to while (1) for micro-controller programming
Arduino Programming Cheat Sheet - PatCostacom
- Arduino board drawing original by Fritzing AREF GND DIGITAL (PWM~) 13 12 ~11 ~10 ~9 8 7 ~6 ~5 4 ~3 2 TX→1 RX←0 L TX RX POWER ANALOG IN IOREF RESET 3 3V 5V GND GND Vin A0 A1 A2 A3 A4 A5 ON WWW ARDUINO CC - Made in Italy RESET ICSP 1 int1 int0 SDA SCL SCL SDA DC in sugg 7-12V limit 6-20V ATmega382: 16MHz, 32KB Flash (prog ), 2KB SRAM
Arduino Cheat Sheet-final-01
Title: Arduino_Cheat_Sheet-final-01 Created Date: 6/22/2011 3:35:13 PM
SCIENTIFIC ARDUINO PROGRAMMING
The design of Arduino boards is such that its form factor is (almost) independent on the Arduino version The rst Arduino boards used a microcontroller whose chip took a somewhat large space; nowadays the same chip is available in a much smaller form factor, however the size and the shape of the Arduino board is still the same (and in
Arduino: A Technical Reference
J M Hughes Arduino: A Technical Reference A Handbook for Technicians, Engineers, and Makers Beijing Boston Farnham Sebastopol Tokyo
Arduino Programming Cheat Sheet Primary source: Arduino
WWW ARDUINO CC - Made in Italy RESET ICSP 1 i n t 1 i n t 0 S D A S C L S C L S D A DC in sugg 7-12V limit 6-20V ATmega382: Arduino Language Reference http
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Introduction to Haptics
Arduino Programming Language
Allison M. Okamura
Stanford University
(optional material for beginning programmers)Programming Guidance
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Potential resources:
•Online courses (e.g., EdX, Udacity) •Web tutorials (Java or C programming languages are most appropriate) •Arduino-specific tutorialsIn this class:
•You will start from existing programs (sketches) and modify them •The complexity of the programming you will do is low •Debugging can be difficult because of the real-time nature of haptic interaction •You should learn by doing. There is little you can do to damage yourHapkit through programming mistakes!
We will start by going through some examples at
http://www.learn-c.org/Arduino Programming Language Components
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
StructureVariablesFunctions
Basic syntax
Arithmetic operators
Control structures
Comparison Operators
Boolean Operators
Constants
Data types
ScopeDigital I/O
Analog I/O
MathSerial communication
Defining your own
Arduino Programming Language Components
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
StructureVariablesFunctions
Basic syntax
Arithmetic operators
Control structures
Comparison Operators
Boolean Operators
Constants
Data types
ScopeDigital I/O
Analog I/O
MathSerial communication
Defining your own
Structure: Basic Syntax
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Each statement ends in a semicolon. For example: int a = 13; Curly braces always come in pairs; they are used to define the start and end of functions, loops, and conditional statements. For example: while (boolean expression) statement(s)Single line comment
Multi-line comment
Used to give a name to a constant value. For example: #define ledPin 3 #defineStructure: Arithmetic operators
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Assignment operator stores the value to the right of the equal sign in the variable to the left of the equal sign: sensorVal = analogRead(FSRPin); Addition, subtraction, multiplication, and division. For example: result = value1 + value2; result = value1 - value2; result = value1 * value2; result = value1 / value2; where value1 and value2 are any variables or constants Tips: •Choose variable sizes that are large enough to hold the largest calculated result •For math that requires fractions, use float variables (but there are drawbacks) •Check for order of operations; use parentheses to enforce orderStructure: Control structures
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Tests whether a certain condition has been reached. Used in conjunction with a comparison operator. For example: if (someVariable > 50) // do something hereAllows you to do multiple tests. For example:
if (force > 1) // action A else // action B if if...elseStructure: Control structures
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Creates a loop for repetitive operations.
for (initialization; condition; increment) { //statement(s); forStructure: Control structures
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Allows you to specify different code that should be executed in various conditions. For example: switch (var) { case 1: //do something when var equals 1 break; case 2: //do something when var equals 2 break; default: // if nothing else matches, do the default // default is optional switch caseStructure: Comparison Operators
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
The result of a statement with a comparison operator is either TRUE (1) or FALSE (2) x == y (x is equal to y) x != y (x is not equal to y) x < y (x is less than y) x > y (x is greater than y) x <= y (x is less than or equal to y) x >= y (x is greater than or equal to y) Tips: •Be careful not to accidentally use the assignment operator = instead of ==. •Cannot use statements such as 0 < x < 1; need to do each comparison separatelyStructure: Boolean Operators
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Logical AND. True only if both operands are true, e.g. if (digitalRead(2) == HIGH && digitalRead(3) == HIGH) { // do this only if both inputs are highLogical OR. True if either operand is true, e.g.
if (x > 0 || y > 0) { // do this if either x or y is greater than 0NOT. True if the operand is false, e.g.
if (!x) { // do this if x is false (0)Arduino Programming Language Components
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
StructureVariablesFunctions
Basic syntax
Arithmetic operators
Control structures
Comparison Operators
Boolean Operators
Constants
Data types
ScopeDigital I/O
Analog I/O
MathSerial communication
Defining your own
Variables: Constants
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
When reading or writing to a digital pin, there are only two possible values a pin can take (or be set to): HIGH and LOWLogical levels (result of a comparison):
false is defined as 0 true is defined as 1 (but more broadly, anything but 0) HIGH LOW true false 10.02.34E5
67e-12
2 1013200
Decimal integersIn addition, integer and floating-point constants can be used:Floating point
Variables: Data types
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
Arduino reference materials obtained from http://arduino.cc under a Commons Attribution-ShareAlike 3.0 License.
Used in function delcarations to indicate that the function returns no information. For example: void setup() void loop() A boolean holds one of two values, true or false. For example: boolean running = false; if (running) { // do something void booleanVariables: Data types
Stanford University Introduction to Haptics © Allison M. Okamura, 2014
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