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| #define l1 13 #define l2 12 #define l3 11 #define l4 2 #define la 10 #define lb 8 #define lc 4 #define ld 6 #define le 7 #define lf 9 #define lg 3 #define ldp 5
#define GND A2 #define ECHO A3 #define TRIG A4 #define VCC A5
#define DELAY 5
void setup() { for (int i = 2; i < 14; i++) { pinMode(i, OUTPUT); } pinMode(GND, OUTPUT); pinMode(VCC, OUTPUT); pinMode(TRIG, OUTPUT); pinMOde(ECHO, INPUT);
digitalWrite(VCC, HIGH); digitalWrite(GND, LOW); }
void loop() { digitalWrite(TRIG, LOW); delayMicroseconds(5); digitalWrite(TRIG, HIGH); delayMicroseconds(50); digitalWrite(TRIG, LOW);
double time = double(pulseIn(ECHO, HIGH)) / 10000;
show(int(time * 340 / 2)); }
void show(int num) { for (int i = 0; i < 300 / DELAY; i++) { int tmp = num; int j;
flush(); j = tmp % 10; show_num(j); digitalWrite(l4, LOW); delay(DELAY); digitalWrite(l4, HIGH); tmp -= j; tmp /= 10;
flush(); j = tmp % 10; show_num(j); digitalWrite(l3, LOW); delay(DELAY); digitalWrite(l3, HIGH); tmp -= j; tmp /= 10;
flush(); j = tmp % 10; show_num(j); digitalWrite(ldp, HIGH); digitalWrite(l2, LOW); delay(DELAY); digitalWrite(l2, HIGH); tmp -= j; tmp /= 10;
flush(); j = tmp % 10; show_num(j); digitalWrite(l1, LOW); delay(DELAY); digitalWrite(l1, HIGH); } }
void flush() { digitalWrite(la, LOW); digitalWrite(lb, LOW); digitalWrite(lc, LOW); digitalWrite(ld, LOW); digitalWrite(le, LOW); digitalWrite(lf, LOW); digitalWrite(lg, LOW); digitalWrite(ldp, LOW); }
void show_num(int num) { switch (num) { case 0: _show_0(); break; case 1: _show_1(); break; case 2: _show_2(); break; case 3: _show_3(); break; case 4: _show_4(); break; case 5: _show_5(); break; case 6: _show_6(); break; case 7: _show_7(); break; case 8: _show_8(); break; case 9: _show_9(); break; default: break; } }
void _show_1() { digitalWrite(lb, HIGH); digitalWrite(lc, HIGH); } void _show_2() { digitalWrite(la, HIGH); digitalWrite(lb, HIGH); digitalWrite(lg, HIGH); digitalWrite(ld, HIGH); digitalWrite(le, HIGH); } void _show_3() { digitalWrite(la, HIGH); digitalWrite(lb, HIGH); digitalWrite(lg, HIGH); digitalWrite(ld, HIGH); digitalWrite(lc, HIGH); } void _show_4() { digitalWrite(lf, HIGH); digitalWrite(lg, HIGH); digitalWrite(lb, HIGH); digitalWrite(lc, HIGH); } void _show_5() { digitalWrite(la, HIGH); digitalWrite(lf, HIGH); digitalWrite(lg, HIGH); digitalWrite(lc, HIGH); digitalWrite(ld, HIGH); } void _show_6() { digitalWrite(la, HIGH); digitalWrite(lf, HIGH); digitalWrite(le, HIGH); digitalWrite(ld, HIGH); digitalWrite(lc, HIGH); digitalWrite(lg, HIGH); } void _show_7() { digitalWrite(la, HIGH); digitalWrite(lb, HIGH); digitalWrite(lc, HIGH); } void _show_8() { digitalWrite(la, HIGH); digitalWrite(lb, HIGH); digitalWrite(lc, HIGH); digitalWrite(ld, HIGH); digitalWrite(le, HIGH); digitalWrite(lf, HIGH); digitalWrite(lg, HIGH); } void _show_9() { digitalWrite(la, HIGH); digitalWrite(lb, HIGH); digitalWrite(lc, HIGH); digitalWrite(ld, HIGH); digitalWrite(lf, HIGH); digitalWrite(lg, HIGH); } void _show_0() { digitalWrite(la, HIGH); digitalWrite(lb, HIGH); digitalWrite(lc, HIGH); digitalWrite(ld, HIGH); digitalWrite(le, HIGH); digitalWrite(lf, HIGH); }
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