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This is a library for easily button usage
Supports natvelly ESP32 and and Arduino processors
Library supports multi touch functionality with internal queue stack. For instance you fast pressed double, even triple times. But want to execute quite long code, for instance push some data to the internet cloud. All presses will be stored and and callback will be execute seqentially one by one. Definetelly those calls will be out of ISR Supports two modes: Short press and Long Press
Button library is implementd by attaching hardware interrupts and each event is stored in queue immediatelly, than each callback is processed with possible option
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By timer (supports only ESP32), means on timer function (out of ISR) callback will be called. this is simplify a process
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By Standard loop. You need a call .HandleLoop function and than your defined callback will be called in the same process (loop process)
Due to the hardware limitation not all gpio's supports interrupts. Button will still work without Queue possibbilities In this case button state is analyzed each loop. This give an advantage to simplify code
You can check here which pins are supported by interrupts
There are some feathures as well availbale to handle interrupts on ATMega328 platform on PORTB which are pins D8-D15 When is standard Arduino libs interrupt not available and gpio is between 8 and 15, custom ISR implemented
first declare a button CSimpleButton btn;
in setup call
btn.Create(gpionum, callback,pressed);
where :
gpionum - gpio number
callback - callback function
pressed - bool , defines initial state. For instance for button that wired to gnd during the press should be false. For touch button when is raised signal during touch should be true
CSimpleButton btn; //declare button
void button_callback(uint8_t gpio, button_event_t event) {
Serial.println("Button callback");
}
void setup() {
// put your setup code here, to run once:
btn.Create(4, button_callback,true); //create button attache to gpio 4 and with normal low value
}
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