static void Delay(unsigned int ms)
{
    uint32_t start = getCurrentMillis();
    do
    {
        asm("nop");
    } while (getCurrentMillis() - start < ms); // от clock.c
}

void delayMicroseconds(unsigned int us)
{
    if (us)
    {
        uint32_t begin = getCurrentMicros();
        while ((begin - getCurrentMicros()) < us) // пак от там
        {
        }
    }
}

/******************************************************************************/
/*                      delay.h:                                              */
/******************************************************************************/
/*              edition this &                                                */
/******************************************************************************/

#ifndef _DELAY_INCLUDED_
#define _DELAY_INCLUDED_

//presentation variable

/********************************************************************************/
unsigned long crystal=100000000; // frequecy of MCU - for other crystal change
/********************************************************************************/

unsigned long x;
unsigned long y;

//presentation subs ( we have three sub 1- delay_us 2- delay_ms 3- delay_s

void delay_us(unsigned long a);
void delay_ms(unsigned long b);
void delay_s(unsigned long c);

/******************************************************************************/
// sub delay_us
/******************************************************************************/
void delay_us(unsigned long a){
do{
unsigned long d=0;
x=crystal/50000000;    //
for (d=0;d<x;d++);    //start the VALUE off d is 0 ,  increase  d ,
//if d > x goto next line ,else (d<x) increase d
y++;   // increase y
} while(y<a);  //if y > a goto next line ,else (y<a) goto "do{"
y=0;
}

//in mine program , you write "delay_s(4);" . in this Header "a" is 4 & do-while
//loop repeat 4 ---time = (x*5)/ crystal

/******************************************************************************/
// sub delay_ms
/******************************************************************************/
void delay_ms(unsigned long b){
do{
unsigned long e=0;
x=crystal/5000;   
for (e=0;e<x;e++);
y++;
} while(y<b);
y=0;
}
/******************************************************************************/
// sub delay_s
/******************************************************************************/
void delay_s(unsigned long c){
do{
unsigned long f=0;
x=crystal/5;
for (f=0;f<x;f++);
y++;
} while(y<c);
y=0;
}
#endif

int main(void) {
float temp=4532.1;
    printf("Темп = %.3f°C\n",temp);
}

Темп = 4532.100°C