Using the Ping))) sensor with an ATmega 328p microcontroller

mirzam

Hallo I am beginner at embedded c programming. I have ATmega 328p microcontrol that is programmed in C, want to use Ping sensor and I want to blink LED when the objects is 20 cm from the sensor.

Can anyone help me with the code or how to star. I understand how Ping sensor works but i can not write code.

please help

Franklin

There is code to read the ping with Arduino here http://arduino.cc/en/Tutorial/ping It should be a start to writing 328 code if you are not using an arduino. To blink the led you need to test for the distance and when it reaches 20cm call some code to blink the LED.

mirzam

problem is that I don't know how to time a puls..

Mike Green

We can't really help you with that level of detail on programming a non-Parallax product. There must be some function calls in one of the libraries available to you for your embedded C compiler that will do the sort of timing you need. The Arduino library has a pulse-in function that does this. You might get some ideas from that.

Chris Savage

I updated the subject of your thread to indicate the help you actually need. The original subject gave the impression you may have had a malfunctioning PING))) Sensor.

jtilghman

Franklin wrote: »

There is code to read the ping with Arduino here http://arduino.cc/en/Tutorial/ping It should be a start to writing 328 code if you are not using an arduino. To blink the led you need to test for the distance and when it reaches 20cm call some code to blink the LED.

const int pingPin = 11;
 unsigned int duration, inches;
  void setup() {
   Serial.begin(9600);
 }
 void loop() {
   pinMode(pingPin, OUTPUT);          // Set pin to OUTPUT
  digitalWrite(pingPin, LOW);           // Ensure pin is low
   delayMicroseconds(2);
   digitalWrite(pingPin, HIGH);       // Start ranging
   delayMicroseconds(5);              //   with 5 microsecond burst
   digitalWrite(pingPin, LOW);        // End ranging
   pinMode(pingPin, INPUT);           // Set pin to INPUT
   duration = pulseIn(pingPin, HIGH); // Read echo pulse
   inches = duration / 74 / 2;        // Convert to inches
   Serial.println(inches);            // Display result
   delay(200);                     // Short delay }

I found this http://learn.parallax.com/kickstart/28015 as well. I use these sensors on all of my robots and this code
here is pretty much all you need to get something out of them.

I hope this helps you out.

JT