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--- arduino_cpp [2018/11/14 13:46]
super_admin
+++ arduino_cpp [2019/06/24 20:29] (текущий)
@@ Строка 114: / Строка 114: @@
 }
+</code>
+===== Traffic lights example (без использования блокировочных функций delay()) =====
+<code C++>
+/*
+ * Traffic lights example
+ *
+ * Red light to pin 7
+ * Yellow light to pin 6
+ * Green light to pin 5
+ *
+ * Pedestrian Red light to pin 4
+ * Pedestrian Green light to pin 3
+ * Pedestrian pushbutton pin 2 (it is connected to the GND, therefore internal PULLUP resistor must be ON)
+ *
+ * Arduino IDE 1.6.12
+ */
+ // Pins
+ int red = 7, yellow = 6, green = 5;
+ int p_red = 4, p_green = 3;
+ int button_1 = 2;
+ int butState_1 = HIGH;
+ int butDelay = 10;
+ int checkButton_1 = 0;
+ uint32_t prevButt_time_1 = 0;
+ uint32_t prevTraffic_time = 0;
+ // System variables
+ byte state = 0; // initial state
+ unsigned long i = 1; // system counter
+ unsigned int del = 100; // system delay legnth
+ boolean flag = false;
+void change_traffic_lights(uint8_t r,uint8_t y, uint8_t g){
+    digitalWrite(red, r);
+    digitalWrite(yellow, y);
+    digitalWrite(green, g);
+}
+void change_pedastrian_lights(uint8_t r,uint8_t g){
+    digitalWrite(p_red, r);
+    digitalWrite(p_green, g);
+}
+uint8_t checkButton(){
+  uint8_t newButtonState = digitalRead(button_1);
+  if(newButtonState != butState_1){
+    Serial.print("newButtonState  = "); Serial.println(newButtonState);
+    return true;
+  } else {
+    return false;
+  }
+}
+void setup() {
+  pinMode(red, OUTPUT);
+  pinMode(yellow, OUTPUT);
+  pinMode(green, OUTPUT);
+  pinMode(p_red, OUTPUT);
+  pinMode(p_green, OUTPUT);
+  pinMode(button_1, INPUT_PULLUP);
+  Serial.begin(9600);
+}
+void loop() {
+  // Check button
+  switch(state){
+    case 0:
+      change_traffic_lights(0,0,1);
+      change_pedastrian_lights(1,0);
+      if(checkButton()){
+          prevTraffic_time = millis();
+          state = 5;
+          Serial.println("state = 0; ");
+        }
+    break;
+    case 5:
+      change_traffic_lights(0,0,1);
+      change_pedastrian_lights(1,0);
+      if(millis() - prevTraffic_time >= 3000){
+        prevTraffic_time = millis();
+          state = 3;
+      Serial.println("state = 5; ");
+        }
+    break;
+    case 1:
+      change_traffic_lights(1,1,0);
+      change_pedastrian_lights(1,0);
+      if(millis() - prevTraffic_time >= 3000){
+        prevTraffic_time = millis();
+          Serial.println("state = 1; ");
+          state = 0;
+        }
+    break;
+    case 2:
+      change_traffic_lights(1,0,0);
+      change_pedastrian_lights(0,1);
+      if(millis() - prevTraffic_time >= 5000){
+        prevTraffic_time = millis();
+        Serial.println("state = 2; ");
+        state = 1;
+       }
+    break;
+    case 3:
+      change_traffic_lights(0,1,0);
+      change_pedastrian_lights(1,0);
+      if(millis() - prevTraffic_time >= 2000){
+        prevTraffic_time = millis();
+        Serial.println("state = 3; ");
+        state = 2;
+      }
+    break;
+    default:
+    break;
+  }
+}
 </code>

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