good afternoon,
i am speed testing a project that tracks an objects speed between to gates, i was doing some testing a low speeds getting 61.73 feet per second. So i decided to up the speed of the object and my display is giving me INF.
I am using to IR sensors to pull the D7 and D8 pins low to start and stop a timer, while using 37.5mm as the distance between them. please send help because i'm running out of ideas what it could be
//#include <splash.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
//#include <QTRSensors.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
const int LED = 13;
float csped = 000;
float msped = 000;
const int IRA = 7;
const int IRB = 8;
int gata = HIGH;
int gatb = HIGH;
int t1 = 0;
int t2 = 0;
float ti = 0;
float dist = .0375;
int isped = 0;
int L = 0;
int k = 0;
void setup() {
// put your setup code here, to run once:
pinMode( IRA, INPUT_PULLUP);
pinMode( IRB, INPUT_PULLUP);
pinMode( LED, OUTPUT);
Serial.begin(9600);
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) // Address 0x3C for 128x64
{
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
display.display();
delay(2000); // Pause for 2 seconds
// Clear the buffer
display.clearDisplay();
}
void loop() {
// put your main code here, to run repeatedly:
for(; L == 0; L++)
{
display.clearDisplay();
display.setTextColor(WHITE);
display.setTextSize(2);
display.setCursor(45,25);
display.print(csped);
display.setCursor(45,40);
display.print(isped);
display.display();
k=0;
}
gata = digitalRead(IRA);
if( gata == LOW)
{
t1 = millis();
while( k == 0 )
{
digitalWrite(LED, HIGH);
gatb = digitalRead(IRB);
if( gatb == LOW)
{
t2 = millis();
ti = t2-t1;
delay (1);
ti = ti/1000;
msped = dist/ti;//velocity in m/s
csped = msped*3.2808398950131; //velocity in feet per second
//isped = csped + .5;
k= 1;
digitalWrite(LED, LOW);
L = 0;
}
}
}
}
my theory is that the float can't handle the math on the metres divided by the time which is very quick