point of sale - how to set more than one timer in verifone vx520 -

i want set timer inputting key , 1 timer turning light off use first timer set , can't set more 1 timer , second timer didn't work.

i use code below

int timer1, timer2; long events; timer1 = set_timer(8000, evt_timer); timer2 = set_timer(5000, evt_timer); while(1){ events = wait_event(); if(events & evt_kbd){ clr_timer(timer1); break; } else if (events & evt_timer) { printf("time_out"); break; }  while(1){ events = wait_event(); if(events & evt_kbd){ clr_timer(timer2); break; } else if (events & evt_timer) { printf("time_out2"); break; } } 

you need use different event mask (evt_timer) if want capture them different events. tricky thing need careful use because may trigger other actions. these events defined in svc.h (note mask long , long defined being 32 bits, don't have left after standard events used).

the news set_timer returns id (that's timer1 , timer2 in code). can use svc_ticks api determine timer has expired. wrote wrapper called "timeremains" me that.

//first, define "timeremains" char timeremains(long* timer) {     return svc_ticks(0, timer); }  //here's code may like: if(!timeremains(&timer1)) {     //timer1 has expired.  whatever wanted when happens.     //note: don't know state of timer2--it may have expired,      //      need deal }  if(!timeremains(&timer2)) {     //timer2 has expired.  whatever wanted when happens.     //note: though pretty sure timer1 has not yet expired,     // can't forget it. if going exit polling loop,      // sure clear first. }