Arduino Cheat Sheet: Main Concepts, Cheat Sheet of Software Engineering

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ARDUINO CHEAT SHEET Content for this Cheat Sheet provided by Gavin from Robots and Dinosaurs. For more information visit: http://arduino.cc/en/Reference/Extended Structure void setup() void loop() Control Structures if (x<5){ } else {} switch (myvar) { case 1: break; case 2: break; default: } for (int i=0; i <= 255; i++){} while (x<5){ } do {} while (x<5); continue; //Go to next in do/for/while loop return x; // Or ‘return;’ for voids. goto // considered harmful :-) Further Syntax // (single line comment) /* (multi-line comment) */ #define DOZEN 12 //Not baker's! #include General Operators = (assignment operator) + (addition) - (subtraction) * (multiplication) / (division) % (modulo) == (equal to) != (not equal to) < (less than) > (greater than) <= (less than or equal to) >= (greater than or equal to) && (and) || (or) ! (not) Pointer Access & reference operator * dereference operator Bitwise Operators & (bitwise and) | (bitwise or) 4 (bitwise xor) ~ (bitwise not) << (bitshift left) >> (bitshift right) Compound Operators ++ (increment) -- (decrement) += (compound addition) (compound subtraction) (compound multiplication) /= (compound division) &= (compound bitwise and) |= (compound bitwise or) Constants HIGH | LOW INPUT | OUTPUT true | false 143 // Decimal number 0173 // Octal number 0b11011111 //Binary 0x7B // Hex number 7U // Force unsigned 10L // Force long 15UL // Force long unsigned 10.0 // Forces floating point 2.4e5 // 240000 Data Types void boolean (0, 1, false, true) char (e.g. ‘a’ -128 to 127) unsigned char (0 to 255) byte (0 to 255) int (-32,768 to 32,767) unsigned int (0 to 65535) word (0 to 655word (0 to 65535) long (-2,147,483,648 to 2,147,483,647) unsigned long (0 to 4,294,967,295) float (-3.4028235E+38 to 3.4028235E+38) double (currently same as float) sizeof(myint) // returns 2 bytes Strings char S1[15]; char S2/[8]={'a' char S3/[8]={'a','r','d','u','i','n', //\ncluded \O null termination char S4{ ] = "arduino"; char S5[8] char S6[15] = Arrays int myints[6]; int myPins[] = {2, 4, 8, 3, 6}; int mySensVals[6] = {2, 4, -8, 3, 2}; Conversion char() — byte() int() ‘word() long() _ float() Qualifiers static // persists between calls volatile // use RAM (nice for ISR) const // make read-only PROGMEM // use flash Digital VO pinMode(pin, [INPUT,QUTPUT]) digitalWrite(pin, value) int digitalRead(pin) /N\rite High to inputs to use pull-up res Analog /O analogReference([DEFAULT, INTERNAL,EXTERNAL]) int analogRead(pin) //Call twice if ‘switching pins from high Z source. analogWrite(pin, value) // PWM. Advanced /O tone(pin, freqhz) tone(pin, freqhz ,duration_ms) noTone(pin) shiftOut(dataPin, clockPin, [MSBFIRST,LSBFIRST], value) unsigned long pulseln(pin,[HIGH,LOW)) Time unsigned long millis() // 50 days overflow. unsigned long micros() // 70 min overflow delay(ms) delayMicroseconds(us) Math min(x, y) max(x, y) abs(x) constrain(x, minval, maxval) map(val, fromL, fromH, toL, toH) pow(base, exponent) sqrt(x) ‘sin(rad) cos(rad) tan(rad) Random Numbers randomSeed(seed) // Long or int long random(max) long random(min, max) Bits and Bytes lowByte() highByte() bitRead(x,bitn) bitWrite(x,bitn, bit) bitSet(x,bitn) bitClear(x,bitn) bit(bitn) //bitn: O-LSB 7-MSB. External Interrupts attachinterrupt(interrupt, function, [LOW,CHANGE, RISING, FALLING]) detachinterrupt(interrupt) interrupts() nointerrupts() Serial. begin([300, 1200, 2400, 4800, 9600,14400, 19200, 28800, 38400, 57600,115200]}) end() int available() int read() flush() print() printin() write() EEPROM (#include ) byte read(intAddr) write(intAddr,myByte) Servo (#include ) attach(pin , [min_uS, max_uS]) write(angle) // 0-180 writeMicroseconds(uS) //1000- 2000,1500 is midpoint read() // 0-180 attached() //Returns boolean detach() SoftwareSerial(RxPin,TxPin) // #include begin(longSpeed) // up to 9600 char read() // blocks till data print(myData) or printin(myData) Wire (#include ) // For 120 begin() // Join as master begin(addr) // Join as slave @ addr requestFrom(address, count) beginTransmission(addr) // Step 1 send(mybyte) // Step 2 ‘send(char * mystring) send(byte * data, size) endTransmission() // Step 3 byte available() // Num of bytes byte receive() //Return next byte onReceive(handler) onRequest(handler) ‘ATMega168 | ATMega328 | ATMega280 Flash (2k for corres sams 2a SRAM | 1K 28 exe EEPROM 5128 1K 8 Duemitanover Nano/ Pro/ Mega Frown 14+ 6andop sy y yeaa #otl0 (Nano has 14 +8) S416 analog o-RXI 1-71 sete! Ping | 0°8X 19-AX2 18-12 1K 17-8xS 16-136 1S-Axe 14-14 2 rio) 23,21,20,9,8 Ext Interrupts | (int 1) (RQ0™- IFS) PWM Pins 0-19 38S : 51 MOS! spt 12-MISO- 50-MISO 18-ScK 52-S0K wo ‘Analogs “SDA |20= SDA Analogs -Sck _|21 Sct es ia elo so EFS] @ woe nsenped "spo || 38 SFE] oe es (faD}Poo2 Besriscy (0) ots exraigiease7Blpos qos oraLieros Beas 6 q s mons ‘Amogetwanen28 Arauino reser] 09" rxo bor og Bee q moa bog git isco oor (wm) 008 he] gis isp oo%0 qu doe 86 SO |S Head 0-0 arduino.ce