arduino ignore NOP timing

Projects Programming
1 
#define NOP __asm__ __volatile__ ("nop")
void setup() {
  DDRB |= 0b00100000; 
  cli();
}

// the loop function runs over and over again forever
void loop() {


  PORTB |= 0b00100000;
  //digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
   
  NOP;
NOP;
NOP;
..... many more NOPS;

then code to turn it on

}

hi guys,
WHERE is that stupid function like add -z to assembly to don't skip NOP blocks? cannot find it anywhere.. :frowning: timing is ignored. with delay - code works. thanx for help!

2 
#define NOP __asm__ __volatile__ ("nop")
void setup() {
  DDRB |= 0b00100000; 
  cli();
}

// the loop function runs over and over again forever
void loop() {


  PORTB |= 0b00100000;

__builtin_avr_delay_cycles (800);
   
    PORTB &= ~0b00100000;

__builtin_avr_delay_cycles (800);


}

even this code doesn't work.. should wait 50ms which is visible as blinking (tested with delay(50))

3

biely123:
WHERE is that stupid function

Evidently not in the Arduino reference, so perhaps you can draw your own conclusions.

with delay - code works.

So why not use it?
This was not hard to find.
https://forum.arduino.cc/index.php?topic=43333.0

4

I have found out. it was not 800 but 800000 cycles to have 50ms.. my bad...