anatolykopyl/longboard-speedometer
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anatolykopyl
2019-05-30 03:25:55 +03:00
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parent 994b7f1adc
commit a212c5a49d
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#include "Timer.h"
Timer t;
//Pinout for a pro micro, check schematic
int D1 = 2;
int D2 = 5;
int D3 = 6;
int D4 = 12;
int A = 3;
int B = 7;
int C = 14;
int D = 16;
int E = 17;
int F = 4;
int G = 13;
int DOT = 15;
int SENS = 10;
int WAIT = 500; //Time between updates
double CIRCUMF = 3.14 * 7; //Circumference of your wheel
int dist = 0;
int speedKMH = 0;
bool got_signal = false;
int rotations = 0;
void draw_char(char c, int digit) {
digitalWrite(D1, HIGH);
digitalWrite(D2, HIGH);
digitalWrite(D3, HIGH);
digitalWrite(D4, HIGH);
digitalWrite(digit, LOW);
if (digit == D4) {
digitalWrite(DOT, HIGH);
} else {
digitalWrite(DOT, LOW);
}
switch(c) {
case '1':
digitalWrite(A, LOW);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, LOW);
digitalWrite(E, LOW);
digitalWrite(F, LOW);
digitalWrite(G, LOW);
break;
case '2':
digitalWrite(A, HIGH);
digitalWrite(B, HIGH);
digitalWrite(C, LOW);
digitalWrite(D, HIGH);
digitalWrite(E, HIGH);
digitalWrite(F, LOW);
digitalWrite(G, HIGH);
break;
case '3':
digitalWrite(A, HIGH);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, LOW);
digitalWrite(F, LOW);
digitalWrite(G, HIGH);
break;
case '4':
digitalWrite(A, LOW);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, LOW);
digitalWrite(E, LOW);
digitalWrite(F, HIGH);
digitalWrite(G, HIGH);
break;
case '5':
digitalWrite(A, HIGH);
digitalWrite(B, LOW);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, LOW);
digitalWrite(F, HIGH);
digitalWrite(G, HIGH);
break;
case '6':
digitalWrite(A, HIGH);
digitalWrite(B, LOW);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, HIGH);
digitalWrite(F, HIGH);
digitalWrite(G, HIGH);
break;
case '7':
digitalWrite(A, HIGH);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, LOW);
digitalWrite(E, LOW);
digitalWrite(F, LOW);
digitalWrite(G, LOW);
break;
case '8':
digitalWrite(A, HIGH);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, HIGH);
digitalWrite(F, HIGH);
digitalWrite(G, HIGH);
break;
case '9':
digitalWrite(A, HIGH);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, LOW);
digitalWrite(F, HIGH);
digitalWrite(G, HIGH);
break;
case '0':
digitalWrite(A, HIGH);
digitalWrite(B, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, HIGH);
digitalWrite(F, HIGH);
digitalWrite(G, LOW);
break;
}
delay(6);
}
void setup() {
pinMode(D1, OUTPUT);
pinMode(D2, OUTPUT);
pinMode(D3, OUTPUT);
pinMode(D4, OUTPUT);
pinMode(A, OUTPUT);
pinMode(B, OUTPUT);
pinMode(C, OUTPUT);
pinMode(D, OUTPUT);
pinMode(E, OUTPUT);
pinMode(F, OUTPUT);
pinMode(G, OUTPUT);
pinMode(DOT, OUTPUT);
pinMode(SENS, INPUT_PULLUP);
t.every(WAIT, update_speed);
}
void loop() {
t.update();
if (digitalRead(SENS) and !got_signal) {
got_signal = true;
rotations++;
}
if (!digitalRead(SENS)) {
got_signal = false;
}
draw_char(speedKMH/1000%10 + '0', D1);
draw_char(speedKMH/100%10 + '0', D2);
draw_char(speedKMH/10%10 + '0', D3);
draw_char(speedKMH%10 + '0', D4);
}
void update_speed() {
if (rotations > 1) {
dist = CIRCUMF * rotations / 2;
speedKMH = dist * 3.6 / (WAIT / 1000);
} else {
speedKMH = 0;
}
got_signal = false;
rotations = 0;
}