seven segment display 4in1

Author: yehnan

SevenSegment4in1/SevenSegment4in1.fzz

@@ -0,0 +1,114 @@
+
+#define PIN_0 2
+#define PIN_g 3
+#define PIN_c 4
+#define PIN_h 5
+#define PIN_d 6
+#define PIN_e 7
+#define PIN_b 8
+#define PIN_1 9
+#define PIN_2 10
+#define PIN_f 11
+#define PIN_a 12
+#define PIN_3 13
+
+#define POS_NUM 4
+#define SEG_NUM 8
+const byte pos_pins[POS_NUM] = {PIN_0, PIN_1, PIN_2, PIN_3};
+const byte seg_pins[SEG_NUM] = {PIN_a, PIN_b, PIN_c, PIN_d, PIN_e, PIN_f, PIN_g, PIN_h};
+
+#define t true
+#define f false
+const boolean data[10][SEG_NUM] = {
+  {t, t, t, t, t, t, f, f}, // 0
+  {f, t, t, f, f, f, f, f}, // 1
+  {t, t, f, t, t, f, t, f}, // 2
+  {t, t, t, t, f, f, t, f}, // 3
+  {f, t, t, f, f, t, t, f}, // 4
+  {t, f, t, t, f, t, t, f}, // 5
+  {t, f, t, t, t, t, t, f}, // 6
+  {t, t, t, f, f, f, f, f}, // 7
+  {t, t, t, t, t, t, t, f}, // 8
+  {t, t, t, t, f, t, t, f}, // 9
+};
+
+void pf(const char *fmt, ... ){
+    char tmp[128]; // max is 128 chars
+    va_list args;
+    va_start (args, fmt );
+    vsnprintf(tmp, 128, fmt, args);
+    va_end (args);
+    Serial.print(tmp);
+}
+
+void setDigit(int pos, int n){
+  if(pos < 0 || 3 < pos){
+    pf("error pos=%d\n", pos);
+    return;
+  }
+  
+  for(int p = 0; p < POS_NUM; p++){
+    if(p == pos)
+      digitalWrite(pos_pins[p], LOW);
+    else
+      digitalWrite(pos_pins[p], HIGH);
+  }
+    
+  if(0 <= n && n <= 9){
+    for(int i = 0; i < SEG_NUM; i++){
+      digitalWrite(seg_pins[i], data[n][i] == t ? HIGH : LOW);
+    }
+  }
+  else{
+    for(int i = 0; i < SEG_NUM; i++){
+      digitalWrite(seg_pins[i], LOW);
+    }
+    digitalWrite(PIN_h, HIGH);
+    pf("error pos=%d, n=%d\n", pos, n);
+  }
+}
+
+void setNumber(int number)
+{
+  int n0, n1, n2, n3;
+  n3 = number / 1000;
+  number %= 1000;
+  n2 = number / 100;
+  number %= 100;
+  n1 = number / 10;
+  n0 = number % 10;
+  
+  setDigit(0, n0); delay(5);
+  setDigit(1, n1); delay(5);
+  setDigit(2, n2); delay(5);
+  setDigit(3, n3); delay(5);
+}
+
+unsigned long time_previous;
+void setup() {
+  Serial.begin(115200);
+  
+  for(int i = 0; i < POS_NUM; i++){
+    pinMode(pos_pins[i], OUTPUT);
+    digitalWrite(pos_pins[i], HIGH);
+  }
+  for(int i = 0; i < SEG_NUM; i++){
+    pinMode(seg_pins[i], OUTPUT);
+    digitalWrite(seg_pins[i], LOW);
+  }
+  
+  time_previous = millis();
+}
+
+int number = 0;
+void loop() {
+  unsigned long time_now = millis();
+  if(time_now - time_previous > 1000){
+    number++;
+    time_previous += 1000;
+    pf("number=%d\n", number);
+  }
+
+  setNumber(number);
+}
+