STM32F401RE threads on bare metal

[Petrarka]

I need to make a "multi threaded" application, my mentor told me this, and I quote 
"

you should create a thread by yourself

use any system timer, e.g. simple tick timer

"

I do not really understand this, but he gave me some example pseudocode, hopefully someone can decipher what he meant.

int main(void){

  uint8_t done{0};
  while (1)   
  {
    thread_Xms(&done);
    
    if(done & 1)
    {// exactly 1 ms loop
      
      function_LED_1ms();  //< no any delay sould be contains!!!
      
      function_Input_1ms();//< no any delay sould be contains!!!
      
      function_ETC_1ms();  //< no any delay sould be contains!!!
      
    }    
    if(done & 0x80)
    {// exactly 1 sec loop for example
     // TODO something every 1 sec
    }  
    
    
  }
}
​

[Pavel A.]

>I do not really understand this

Better ask him, to avoid "broken phone" situation. People that teach software in various schools often have peculiar ideas about software, different from what professional developers can suggest.

Just note that he prefers C++, because of syntax in line 3.