From d56ea0dab0b8ca32e1c3ddc7afc643a73482d4c1 Mon Sep 17 00:00:00 2001
From: wancat <wancat@wancat.cc>
Date: Wed, 16 Mar 2022 10:54:01 +0800
Subject: [PATCH] Week 4

---
 week4-1/week4-1.ino |  17 ++++++
 week4-2/week4-2.ino |  21 +++++++
 week4-3/week4-3.ino |  25 +++++++++
 week4-4/week4-4.ino | 130 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 193 insertions(+)
 create mode 100644 week4-1/week4-1.ino
 create mode 100644 week4-2/week4-2.ino
 create mode 100644 week4-3/week4-3.ino
 create mode 100644 week4-4/week4-4.ino

diff --git a/week4-1/week4-1.ino b/week4-1/week4-1.ino
new file mode 100644
index 0000000..bb16957
--- /dev/null
+++ b/week4-1/week4-1.ino
@@ -0,0 +1,17 @@
+const int LED[] = {11, 10, 9, 8, 7, 6, 5, 4};
+
+void setup() {
+  for (int i = 0; i < 8; i++) {
+    pinMode(LED[i], OUTPUT);
+    digitalWrite(LED[i], HIGH);
+  }
+}
+
+void loop() {
+  static bool clk = 0;
+  for (int i = 0; i < 8; i++) {
+    digitalWrite(LED[i], i % 2 == clk);
+  }
+  delay(250);
+  clk = !clk;
+}
diff --git a/week4-2/week4-2.ino b/week4-2/week4-2.ino
new file mode 100644
index 0000000..a0baeaf
--- /dev/null
+++ b/week4-2/week4-2.ino
@@ -0,0 +1,21 @@
+const int LED[] = {11, 10, 9, 8, 7, 6, 5, 4};
+
+void setup() {
+  for (int i = 0; i < 9; i++) {
+    pinMode(LED[i], OUTPUT);
+    digitalWrite(LED[i], HIGH);
+  }
+}
+
+void loop() {
+  for (int i = 0; i < 9; i++) {
+    digitalWrite(LED[i], LOW);
+    delay(100);
+    digitalWrite(LED[i-2], HIGH);
+  }
+  for (int i = 0; i < 8; i++) {
+    digitalWrite(LED[6-i], LOW);
+    delay(100);
+    digitalWrite(LED[8-i], HIGH);
+  }
+}
diff --git a/week4-3/week4-3.ino b/week4-3/week4-3.ino
new file mode 100644
index 0000000..decb5b3
--- /dev/null
+++ b/week4-3/week4-3.ino
@@ -0,0 +1,25 @@
+const int LED[] = {11, 10, 9, 8, 7, 6, 5, 4};
+
+void setup() {
+  for (int i = 0; i < 9; i++) {
+    pinMode(LED[i], OUTPUT);
+    digitalWrite(LED[i], HIGH);
+  }
+}
+
+void loop() {
+  for (int i = 0; i < 3; i++) {
+    digitalWrite(LED[3-i], LOW);
+    digitalWrite(LED[4+i], LOW);
+    delay(100);
+    digitalWrite(LED[3-i], HIGH);
+    digitalWrite(LED[4+i], HIGH);
+  }
+  for (int i = 0; i < 3; i++) {
+    digitalWrite(LED[i], LOW);
+    digitalWrite(LED[7-i], LOW);
+    delay(100);
+    digitalWrite(LED[i], HIGH);
+    digitalWrite(LED[7-i], HIGH);
+  }
+}
diff --git a/week4-4/week4-4.ino b/week4-4/week4-4.ino
new file mode 100644
index 0000000..9836f6a
--- /dev/null
+++ b/week4-4/week4-4.ino
@@ -0,0 +1,130 @@
+#define DELAY 200
+
+const int LED[] = {11, 10, 9, 8, 7, 6, 5, 4};
+const int BUTTON[] = {A0, A1, A2, A3};
+
+int clk = 0;  // 定義每個模式中的計數器
+
+void setup() {
+  for (int i = 0; i < 8; i++) {
+    pinMode(LED[i], OUTPUT);
+    digitalWrite(LED[i], HIGH);
+  }
+  for (int i = 0; i < 4; i++) {
+    pinMode(BUTTON[i], INPUT);
+  }
+}
+
+void call_interval( void (*f)(unsigned int) ) {
+  static unsigned long checkpoint = 0;
+  if (millis() - checkpoint > DELAY) {
+    for (int i = 0; i < 8; i++) {
+      digitalWrite(LED[7 - i], !((value >> i) % 2));
+    }
+    clk += 1;
+    checkpoint = millis();
+  }
+}
+
+/*
+ * Function: get_mode
+ * Return the current mode from buttons input
+ * 
+ * Side effects: reset the clk on button pressed
+ */
+unsigned int get_mode() {
+  static int last = 0;
+  for (int i = 0; i < 4; i++) {
+    if (!digitalRead(BUTTON[i])) {
+      last = i + 1;
+      clk = 0;
+      return last;
+    }
+  }
+  return last;
+}
+
+/*
+ * Function: binary
+ * Display the LED as binary of clk
+ * 
+ * increase clk per DELAY
+ * Side effect: increase clk per DELAY
+ */
+void binary(unsigned int value) {
+  static unsigned long checkpoint = 0;
+  if (millis() - checkpoint > DELAY) {
+    for (int i = 0; i < 8; i++) {
+      digitalWrite(LED[7 - i], !((value >> i) % 2));
+    }
+    clk += 1;
+    checkpoint = millis();
+  }
+}
+
+void gray_code(unsigned int value) {
+  binary(value ^ (value >> 1));
+}
+
+/*
+ * Function: random_popup
+ * Randomly blink LED
+ * 
+ * Randomly select LED. Each LED will turn on for 3 clk
+ * Side effect: increase clk per DELAY
+ */
+void random_popup() {
+  static unsigned long checkpoint = 0;
+  static int hp[] = {0, 0, 0, 0, 0, 0, 0, 0};
+  
+  // Reset hp on mode changing
+  if (clk == 0) {
+    for (int i = 0; i < 8; i++) {
+      hp[i] = 0;
+    }
+  }
+
+  if (millis() - checkpoint > DELAY) {
+    for (int i = 0; i < 8; i++) {
+
+      // Decrease hp
+      if (hp[i] > 0) {
+        hp[i] -= 1;
+      }
+      digitalWrite(LED[i], !(hp[i]));
+    }
+
+    // randomly select LED which is not turned on
+    int choice;
+    do {
+      choice = random(8);
+    } while (hp[choice] > 0);
+    hp[choice] = 4;
+    
+    checkpoint = millis();
+    clk++;
+  }
+}
+
+void clear_all() {
+  for (int i = 0; i < 8; i++) {
+    digitalWrite(LED[i], HIGH);
+  }
+}
+
+void loop() {
+  const int mode = get_mode();
+  if (mode == 1) {
+    binary(clk);
+  }
+  if (mode == 2) {
+    gray_code(clk);
+  }
+  if (mode == 3) {
+    random_popup();
+  }
+  if (mode == 4) {
+    clear_all();
+  }
+  delay(1);
+}