Keil Compiler timer.h Include Function

It's not actually provided by the Compiler - it's from a Library.

You would be best to ask SiLabs if they have a standard delay library for their processors.

But the basic approach is the same for whatever processor you use; eg:

https://www.keil.com/support/docs/606.htm

community.arm.com/.../87452

Thanks. Will update what SiLabs' reply is.

Here is the SiLabs reply;

No, you have to write your own delay_ms(), delay_ms(), functions! If it's just delay func.(controller do nothing, just stay in some loop) here is sample functions:
void delay_us(unsigned int usec){
 unsigned int i;
    for(i = 0; i < usec; i++){        
        ;//j++;
    }
}
void delay_ms(unsigned int msec){
 unsigned int i, j;
    
    for(i = 0; i < msec; i++){        
        for(j = 0; j < 2400; j++){        
            ;// Wait!
        }
    }
}
, which are valid for "SYSCLK=24Mhz"!
If you don't want controller to stay in 'delay loop', you have to use any  timer as systick timer with or without using interrupt!
 

void DELAY_USEC(int){ // where XXXX requires tweaking for each time delay used
   for(i = 0; i < XXXX; i++);

}

void DELAY_MSEC(int){ // where XXXX & YYYY require tweaking for each time delay used
   for(i = 0; i < XXXX; i++);{
      for(j = 0; j < YYYY; j++);};
}

Based on testing using the EFM8BB1LCK, the above delay methods provide very limited utility compared to the typical timer library functions of most compilers.