Thomas GöttgensandGitHub
56fd9c7813
* simplify the observer pattern, since all the called functions are const getters. * use arduino macro over std: for numerical values and refactor local variables in drawScrollbar() * oh, so Cppcheck actually complained about const pointers not being const. * slowly getting out of ifdef hell * fix inkHUD warnings as well * last 2 check warnings * git checks should fail on low defects from now on
109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
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#include "./LatchingBacklight.h"
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#include "assert.h"
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#include "sleep.h"
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using namespace NicheGraphics::Drivers;
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// Private constructor
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// Called by getInstance
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LatchingBacklight::LatchingBacklight()
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{
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// Attach the deep sleep callback
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deepSleepObserver.observe(¬ifyDeepSleep);
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}
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// Get access to (or create) the singleton instance of this class
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LatchingBacklight *LatchingBacklight::getInstance()
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{
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// Instantiate the class the first time this method is called
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static LatchingBacklight *const singletonInstance = new LatchingBacklight;
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return singletonInstance;
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}
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// Which pin controls the backlight?
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// Is the light active HIGH (default) or active LOW?
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void LatchingBacklight::setPin(uint8_t pin, bool activeWhen)
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{
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this->pin = pin;
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this->logicActive = activeWhen;
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pinMode(pin, OUTPUT);
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off(); // Explicit off seem required by T-Echo?
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}
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// Called when device is shutting down
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// Ensures the backlight is off
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int LatchingBacklight::beforeDeepSleep(void *unused)
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{
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// Contingency only
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// - pin wasn't set
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if (pin != static_cast<uint8_t>(-1)) {
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off();
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pinMode(pin, INPUT); // High impedance - unnecessary?
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} else
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LOG_WARN("LatchingBacklight instantiated, but pin not set");
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return 0; // Continue with deep sleep
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}
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// Turn the backlight on *temporarily*
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// This should be used for momentary illumination, such as while a button is held
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// The effect on the backlight is the same; peek and latch are separated to simplify short vs long press button handling
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void LatchingBacklight::peek()
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{
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assert(pin != static_cast<uint8_t>(-1));
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digitalWrite(pin, logicActive); // On
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on = true;
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latched = false;
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}
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// Turn the backlight on, and keep it on
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// This should be used when the backlight should remain active, even after user input ends
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// e.g. when enabled via the menu
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// The effect on the backlight is the same; peek and latch are separated to simplify short vs long press button handling
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void LatchingBacklight::latch()
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{
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assert(pin != static_cast<uint8_t>(-1));
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// Blink if moving from peek to latch
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// Indicates to user that the transition has taken place
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if (on && !latched) {
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digitalWrite(pin, !logicActive); // Off
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delay(25);
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digitalWrite(pin, logicActive); // On
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delay(25);
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digitalWrite(pin, !logicActive); // Off
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delay(25);
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}
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digitalWrite(pin, logicActive); // On
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on = true;
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latched = true;
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}
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// Turn the backlight off
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// Suitable for ending both peek and latch
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void LatchingBacklight::off()
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{
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assert(pin != static_cast<uint8_t>(-1));
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digitalWrite(pin, !logicActive); // Off
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on = false;
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latched = false;
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}
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bool LatchingBacklight::isOn()
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{
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return on;
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}
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bool LatchingBacklight::isLatched()
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{
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return latched;
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}
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#endif
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