88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
/*
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* A demo of a simple AceButton used to handle the events from one button.
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* Pretty much the same as SingleButton.ino example but the button is wired with
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* an external pull-down resistor, instead of using the built-in pull-up
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* resistor.
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*/
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#include <AceButton.h>
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using namespace ace_button;
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// The pin number attached to the button.
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const int BUTTON_PIN = 7;
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#ifdef ESP32
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// Different ESP32 boards use different pins
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const int LED_PIN = 2;
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#else
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const int LED_PIN = LED_BUILTIN;
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#endif
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// LED states. Some microcontrollers wire their built-in LED the reverse.
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const int LED_ON = HIGH;
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const int LED_OFF = LOW;
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// Automatically uses the default ButtonConfig. We will configure this later
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// using AceButton::init() method in setup() below.
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AceButton button;
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void handleEvent(AceButton*, uint8_t, uint8_t);
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void setup() {
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delay(1000); // some microcontrollers reboot twice
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Serial.begin(115200);
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while (! Serial); // Wait until Serial is ready - Leonardo/Micro
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Serial.println(F("setup(): begin"));
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// initialize built-in LED as an output
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pinMode(LED_PIN, OUTPUT);
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// Button uses an external 10k resistor.
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pinMode(BUTTON_PIN, INPUT);
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// We use the AceButton::init() method here instead of using the constructor
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// to show an alternative. Using init() allows the configuration of the
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// hardware pin and the button to be placed closer to each other.
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button.init(BUTTON_PIN, LOW);
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// Configure the ButtonConfig with the event handler, and enable the LongPress
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// and RepeatPress events which are turned off by default.
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ButtonConfig* buttonConfig = button.getButtonConfig();
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buttonConfig->setEventHandler(handleEvent);
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buttonConfig->setFeature(ButtonConfig::kFeatureClick);
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buttonConfig->setFeature(ButtonConfig::kFeatureDoubleClick);
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buttonConfig->setFeature(ButtonConfig::kFeatureLongPress);
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buttonConfig->setFeature(ButtonConfig::kFeatureRepeatPress);
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Serial.println(F("setup(): ready"));
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}
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void loop() {
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// Should be called every 20ms or faster for the default debouncing time
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// of ~50ms.
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button.check();
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}
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// The event handler for the button.
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void handleEvent(AceButton* /* button */, uint8_t eventType,
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uint8_t buttonState) {
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// Print out a message for all events.
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Serial.print(F("handleEvent(): eventType: "));
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Serial.print(eventType);
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Serial.print(F("; buttonState: "));
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Serial.println(buttonState);
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// Control the LED only for the Pressed and Released events.
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// Notice that if the MCU is rebooted while the button is pressed down, no
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// event is triggered and the LED remains off.
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switch (eventType) {
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case AceButton::kEventReleased:
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digitalWrite(LED_PIN, LED_ON);
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break;
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case AceButton::kEventPressed:
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digitalWrite(LED_PIN, LED_OFF);
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break;
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}
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}
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