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edited Apr 28, 2022 at 2:46

Diego

iI have this code showingthat shows the available sram memory

    int freeRam() 
{
  extern int __heap_start, *__brkval; 
  int v; 
  return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 
}

void setup()
{
  Serial.begin(9600);
  Serial.println(freeRam());
}

void loop()
{
}

The arduino compiler shows a different value.

the arduino compiler shows 1856 bytes and
Serial port shows 1850 bytes

What is the correct value?

i have this code showing sram memory

    int freeRam() 
{
  extern int __heap_start, *__brkval; 
  int v; 
  return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 
}

void setup()
{
  Serial.begin(9600);
  Serial.println(freeRam());
}

void loop()
{
}

The arduino compiler shows a different value.

the arduino compiler shows 1856 bytes and
Serial port shows 1850 bytes

What is the correct value?

I have this code that shows the available sram memory

    int freeRam() 
{
  extern int __heap_start, *__brkval; 
  int v; 
  return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 
}

void setup()
{
  Serial.begin(9600);
  Serial.println(freeRam());
}

void loop()
{
}

The arduino compiler shows a different value.

the arduino compiler shows 1856 bytes and
Serial port shows 1850 bytes

What is the correct value?

Source Link

asked Apr 28, 2022 at 2:39

Diego

Arduino compiler shows different value of sram memory

i have this code showing sram memory

    int freeRam() 
{
  extern int __heap_start, *__brkval; 
  int v; 
  return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 
}

void setup()
{
  Serial.begin(9600);
  Serial.println(freeRam());
}

void loop()
{
}

The arduino compiler shows a different value.

the arduino compiler shows 1856 bytes and
Serial port shows 1850 bytes

What is the correct value?

arduino-uno