Not sure what is going on ?!

[coderatchance]

Hello all,

The code below adds 1 to 0 in three different variable types..
"counting" is printed in the main loop.
However, why is this abruptly "reseted" every 165 counts?

Serial print output:

159 159 159
160 160 160
161 161 161
162 162 162
163 163 163
164 164 164
165 165 165
Ò1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 7
8 8 8
9 9 9
10 10 10
11 11 11
12 12 12
13 13 13

Wondering what is going on?
Should not the loop run indefinitely, actually till the variable can be read, store the value?

Best.

byte a;
int b;
uint16_t c;

void setup() {

  Serial.swap(1);
  Serial.begin(9600);
  delay(30);

  a = 0;
  b = 0;
  c = 0;
}

void loop() {

  a = a+1;
  b = b+1;
  c = c+1;
  
  Serial.print(a);
  Serial.print(" ");
  Serial.print(b);
  Serial.print(" ");
  Serial.println(c);
  
}

[jvasileff]

Whatever the problem is, I don't think it is your code which looks fine to me. For good measure, I ran it on an attiny 1617, and the first column resets after 255 as expected.

Is your board is resetting every time at exactly 165, or does the counter/duration vary?