Disable on/off button temporarily

fixes #1

src/gbmanager.cpp

@@ -31,7 +31,7 @@ using std::string;
 
 void buttonPressedCallback(uint gpio, [[maybe_unused]] uint32_t events) {
     absolute_time_t now = get_absolute_time();
-    if (absolute_time_diff_us(lastPressed, now) < 750000) {
+    if (absolute_time_diff_us(lastPressed, now) < 500000) {
         return;
     } else {
         lastPressed = now;
@@ -65,7 +65,9 @@ int main() {
     oneWire.single_device_read_rom(address);
 
     // Initialize the relais
-    Relais relais(RELAIS_PIN);
+    // It need the button callback function, since it has to disable the on/off
+    // button for a short amount of time
+    Relais relais(RELAIS_PIN, &buttonPressedCallback);
 
     // Initialize the Buttons
     gpio_set_irq_enabled_with_callback(BUTTON_1_PIN, GPIO_IRQ_EDGE_FALL, true,
@@ -88,6 +90,8 @@ int main() {
     sleep_ms(3000);
 
     while (true) {
+        uint64_t destTime = time_us_64() + 1000000;
+
         oneWire.convert_temperature(address, true, false);
         temp_act = oneWire.temperature(address);
 
@@ -109,5 +113,7 @@ int main() {
                               CUSTOM_CHAR_DEG, systemInfo);
         myLCD.setCursor(0, 0);
         myLCD.sendString(lcdText);
+
+        sleep_until((absolute_time_t){destTime});
     }
 }

src/relais.cpp

@@ -1,12 +1,26 @@
 #include "relais.h"
 
-Relais::Relais(uint gpio) : gpio{gpio} {
+Relais::Relais(uint gpio, gpio_irq_callback_t callback)
+    : gpio{gpio}, callback{callback} {
     gpio_init(gpio);
     gpio_set_dir(gpio, GPIO_OUT);
     off();
 }
 
-void Relais::activate(bool active) { gpio_put(gpio, !active); }
+void Relais::activate(bool active) {
+    if (active == lastState) {
+        return;
+    }
+
+    lastState = active;
+
+    gpio_set_irq_enabled_with_callback(BUTTON_3_PIN, GPIO_IRQ_EDGE_FALL, false,
+                                       callback);
+    gpio_put(gpio, !active);
+    sleep_ms(100);
+    gpio_set_irq_enabled_with_callback(BUTTON_3_PIN, GPIO_IRQ_EDGE_FALL, true,
+                                       callback);
+}
 
 void Relais::on() { activate(true); }
 

src/relais.h

@@ -4,15 +4,19 @@
 #include "hardware/gpio.h"
 #include "pico/stdlib.h"
 
+extern const uint BUTTON_3_PIN; // declared in gbmanager.cpp
+
 class Relais {
   public:
-    Relais(uint gpio);
+    Relais(uint gpio, gpio_irq_callback_t callback);
     void activate(bool active);
     void on();
     void off();
 
   private:
     uint gpio;
+    bool lastState;
+    gpio_irq_callback_t callback;
 };
 
 #endif