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Ticker
The Ticker interface is used to setup a recurring interrupt to repeatedly call a function at a specified rate.
Any number of Ticker objects can be created, allowing multiple outstanding interrupts at the same time. The function can be a static function, or a member function of a particular object.
Hello World!¶
A simple program to setup a Ticker to invert an LED repeatedly...
Example attaching a static function to a ticker
#include "mbed.h" Ticker flipper; DigitalOut led1(LED1); DigitalOut led2(LED2); void flip() { led2 = !led2; } int main() { led2 = 1; flipper.attach(&flip, 2.0); // the address of the function to be attached (flip) and the interval (2 seconds) // spin in a main loop. flipper will interrupt it to call flip while(1) { led1 = !led1; wait(0.2); } }
API¶
Examples¶
Example attaching a member function to a ticker
#include "mbed.h" // A class for flip()-ing a DigitalOut class Flipper { public: Flipper(PinName pin) : _pin(pin) { _pin = 0; } void flip() { _pin = !_pin; } private: DigitalOut _pin; }; DigitalOut led1(LED1); Flipper f(LED2); Ticker t; int main() { t.attach(&f, &Flipper::flip, 2.0); // the address of the object, member function, and interval // spin in a main loop. flipper will interrupt it to call flip while(1) { led1 = !led1; wait(0.2); } }