When you have more than 2 or 3 names that are the same except for a trailing number, it's time to consider arrays and loops:
const byte triggerPin = 13;
const byte echoPin = 12;
const unsigned long t = 10;
const unsigned long sec = 2000;
const byte ledPins[10] = {11, 10, 9, 8, 7, 6, 5, 4, 3, 2};
void setup()
{
pinMode (triggerPin, OUTPUT);
pinMode (echoPin, INPUT);
Serial.begin (9600);
/*
[quote="TheMemberFormerlyKnownAsAWOL, post:7, topic:898057"]
make the LED pins outputs
[/quote]
*/
for (int i = 0; i < 10; i++)
{
pinMode (ledPins[i], OUTPUT);
}
}
void loop()
{
//the code below this line sends a ping through the ultrasonic sensor
digitalWrite (triggerPin, LOW);
delayMicroseconds(t);
digitalWrite(triggerPin, HIGH);
delayMicroseconds(t);
digitalWrite (triggerPin, LOW);
// the code below this line calculates the distance
unsigned long pingtime = pulseIn(echoPin, HIGH, 30000UL);
int distanceCM = pingtime / 58; // Round-trip time for sound is 58.2 microseconds per cm
Serial.println(distanceCM);
Serial.print(" cm");
// A distanceCM of zero means no echo was seen
if (distanceCM != 0 && distanceCM <= 5)
{
for (int i = 0; i < 10; i++)
{
digitalWrite (ledPins[i], HIGH);
delay (sec);
}
for (int i = 0; i < 10; i++)
{
digitalWrite (ledPins[i], LOW);
}
}
}
this is a small doubt of mine. i wanted two chunks of code to run at the same time . i think that the ide executes the code line by line. so is there any way to run two chinks of code at a time?
The usual approach is to break each chunk into small pieces, execute one piece of chunk1, execute one piece of chunk2, execute the next piece of chunk1, the next piece of chunk2 and so on. That way there is the perception that it runs in parallel.
