反发行（C程序）

Question

I only want my count_float to reset back to 0 when Alarm_Status.bits.b3 is not set and when leakDetected=0 . However it never seems to reset for some reason. When alarm goes off I put leakDetected to 1 so the counter cant be reset. But if alarm goes off for 2 seconds and is disabled again it holds this count of 2. It should reset to 0.

{   
    int count_float     
    int fixedCount = 50;
    short  leakDetected=0;
    BS(TRISB,7);    // Bund sw port=input.
    DelayMs(2); // will rise is bund SW open
    if(RB7){                                
        if(Control.bits.BUND_ENABLE){       // if bund alarm enabled
            if(Alarm_Status.bits.b3){   // if  already set
                count_float +=10;       //count increased by 10
                if(count_float == fixedCount) { 
                    leakDetected=1;
                    DU_Reason.bits.EmergencyDialIn=1;// alarm!
                }
            }
            if((!Alarm_Status.bits.b3)&&(!leakDetected)){
                count_float=0;
            }                           
        }   
    } else {
        Alarm_Status.bits.b3=1;     // Bund Sw Closed
        BC(TRISB,7);
    }
}

Answer 1

You are using count_float uninitialized. Accessing a variable without initializing it leads to undefined behavior.

To fix it, simply initialize as:

int count_float = 0;

---

About your updated question, you initialize count_float everytime you come to this loop. If you want it to maintain the previous count(as it is looping every second), please make it static as shown below.

static int count_float = 0;  /* '= 0' is optional but recommended */