Thread: crazy if statement

hi i have this code

Code:

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
//#include <iof1.h>
#include <stdarg.h>
#include <time.h>


int main()
{
        int PORTE,i;
        int trigarray[5];
        int trigmask;
        int totalmask;
        int trig;

    trigarray[0]=0;
    trigarray[1]=0;
    trigarray[2]=0;
    trigarray[3]=0;
    trigarray[4]=0;
    trigarray[5]=0;


    while(1)
    {
        PORTE=4;

  if((PORTE=1)&& (trigarray[0]==0)){trigarray[0]=1; trig=1;}
  if((PORTE=2) &&(trigarray[1]==0)){trigarray[1]=1; trig=2;}
  if((PORTE=4) &&(trigarray[2]==0)){trigarray[2]=1; trig=4;}
  if((PORTE=8) &&(trigarray[3]==0)){trigarray[3]=1; trig=8;}
  if((PORTE=16) &&(trigarray[4]==0)){trigarray[4]=1; trig=16;}
  if((PORTE=32) &&(trigarray[5]==0)){trigarray[5]=1; trig=32;}


totalmask+=trig;
printf("%d",totalmask);;

     }
}

and what i want it to only run each of the if statement so it doesnt mess up my mask

sooo i only want the because coz i need the while loop it will bump my total mask up beacuse it will keep running the same if statement soo i try to use trigarray and set it to 1 and make the if statements need to requirements to run but its not working my knowledge is not that great can you guys help?

well i want to build up a mask by adding 1 , 2 ,4 ,8 ,16 , 32 which i will then use to make my lights flash but i can only have the 1 be used once or the 2 be used once or the 18 . so i can get get a maximum of 63 if all the ifs add up the final mask.

its like i only want to allow the if statement to only run once but allow the others to run but when one of them have been used stop it from being used

its a little hard to understand maybe that helped


im using this code as if the switch is flicked on make the light blink dont keep running the if statement and if the switch is flicked back down the light will still be blinking

yea that sounds kinda what im trying to do when its on stay on and dont change kinda thing

soz i was replying to the other guy i think i want to toggle i think what i want is

if (port1)&&(toggle off) mask=X, toggle on

so when it then comes back around it wont execute that if because toggle is now on

Originally Posted by Nightowl

Well . . . .

Just go something like this to set a bit . . .

Code:

/* to set a bit on . . . in this case, the third */
flags |= 0x08;
/* to remove a bit */
flags &= ~0x08;

Make sense? The ~ operator inverts all the bits in a given variable.

i dont understand if i set the"bit" on what will happen it dont know about bit shifting ect

okky i will try and explain
i have a bigger program which i will put all this into. i have a while infinity loop in my main program becasue it is responsible for making the zones flash


zone1=1 000001
zone2=2 000010
zone3=4 000100
zone4=8 001000
zone5=16 010000
zone6=32 100000

these all need to be toggled on ONCE because if zone 1 is used once it will mess up my binary mask. soo thats what i was trying to do with the if statement

if(TOGGLE=0)&&(zone1) toggle=1

soo it has to have 2 true requirements for it to run the if but after it runs it once toggle=1 soo only 1 of the requirements is now true so that if will not run

sorry im not the best of explaining things