Error while inputting EEPROM.read() and EEPROM.write()

Question

I am trying to store data in ATmega328 (Arduino Uno) using the following code using tinkercad:

#include <EEPROM.h>

void setup() {
  int addr, data=1;
  Serial.begin(9600);
  for (addr=0; addr<1023; addr++) {
    EEPROM.write(addr, data);
  }
  for (addr=0; addr<1023 ; addr++) {
    Serial.print(EEPROM.read(addr), DEC);
  }
}

When I simulate the code in the tinkercad, then i get the following error:

In function `main':
43: undefined reference to `loop'
 error: ld returned 1 exit status

Please help me where is the error in my code. I am not able to understand the error source.

StarCat · Accepted Answer · 2020-06-25 05:56:48Z

4

Have you looked at any Arduino IDE example programs?

They all have a setup() and loop() function.

Apparently, Tinkercad is missing the loop() function in your code.

You can solve the issue by adding an empty void loop() { } after your void setup() { ... } code.

answered Jun 25, 2020 at 5:56

StarCat

1,6811 gold badge7 silver badges15 bronze badges

Thank you, now the code works. But I have a question in this code why there is use of the empty void loop() because it executes infinitely. It may be a silly question, I am a beginner to Arduino programming. But please tell what is the significance of empty void loop() in this code?

Manu
– Manu

2020-06-25 07:42:08 +00:00
Commented Jun 25, 2020 at 7:42
1

In most projects, Arduino code does not just execute once, but runs in a continuous loop, for example to service button presses, display data, take sensor measurements and act on them. The creators of the Arduino IDE have made the loop() function a standard part of every Arduino program to facilitate this. It's not part of standard C++. In your case your program just executes once and the loop() function does not have any significance. It's just doing nothing in a "controlled" way (continuous loop) and waiting for a reset.

StarCat
– StarCat

2020-06-25 08:19:54 +00:00
Commented Jun 25, 2020 at 8:19

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