EmbeddedDelay.c

#include <stdbool.h>
#include <stdint.h>

#define DELAY_INIT  {0x0000, false}

typedef struct{
    uint16_t time;
    bool set;
}delay_t;

void setDelay(volatile delay_t*, uint16_t);
bool isDelayCount(volatile delay_t*);
void handleDelayInterrupt(volatile delay_t*);

void setDelay(volatile delay_t* delay, uint16_t time){
    delay->set = false;
    delay->time = time;
    if (time)
        delay->set = true;
}

bool isDelayCount(volatile delay_t* delay){
    return delay->set;
}

void handleDelayInterrupt(volatile delay_t* delay){
    if ((delay->set)&&(!(--delay->time)))
        delay->set = false;
}