Arduino vs mBed

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Arduino vs mBed

Arduino	mBed
Basic GPIO
void foo() { pinMode(4, INPUT_PULLUP); pinMode(5, OUTPUT); digitalWrite(5, !digitalRead(4)); }	void foo() { DigitalIn pin4(D4, PullUp); DigitalOut pin5(D5); pin5 = !pin4; }
Attach interrupt to pin 3
void callback() {} void setup() { // Replace 1 with 3 for Arduino Due. 1 means pin 3 on Uno. attachInterrupt(1, callback, FALLING); }	void callback() {} InterruptIn button(D1); void main() { button.fall(callback); }
Waiting
void foo() { // Wait 60 seconds. Note that the L suffix is required because // the Uno boards are 16 bit, and int can only go up to 32767. delay(60 * 1000L); // Wait 500 milliseconds. delay(500); // Wait 500 microseconds. delayMicroseconds(500); }	void foo() { // Wait 60 seconds. wait(60); // Or using integers (faster on processors without FPU). mBed boards // are 32-bit so no need for an L suffix. wait_ms(60 * 1000); // Wait 500 milliseconds. wait_ms(500); // Or using floats: wait(0.5); // Wait 500 microseconds. wait_us(500); }
Get system time in milliseconds
unsigned long t = millis();	// clock() returns microseconds since boot in a 64-bit integer. unsigned int t = clock() / 1000;
Periodically call function
	void callback() { } Ticker f; void main() { // Call callback every 0.5 seconds. f.attach(callback, 0.5f);
Time a function call
Use PWM
Write to serial port
Quickly read/write multiple GPIOs
Use SPI
Use I2C
Analogue Input
void setup() { pinMode(A0, INPUT); } void foo() { int x = analogRead(A0);	AnalogIn ain(A0); void foo() { float x = ain;
Analogue Output
Not possible	AnalogOut aout(A0); void foo() { aout = 0.5f;
SD cards
Run multithreaded code
Print to serial
void setup() { Serial.begin(115200); } void foo(int a, float b, const char* c) { Serial.print("a: "); Serial.print(a); Serial.print(" b: "); Serial.print(b); Serial.print(" c: "); Serial.println(c); }	Serial serial(USBTX, USBRX); int main() { serial.baud(115200); // ... } void foo(int a, float b, const char* c) { serial.printf("a: %d b: %f c: %s\n", a, b, c); }