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Automatic Door using RIMS

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John Pinares

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Hi everyone. I have this assignment I have to do using RIMS and I need help coming up with an algorithm. The assignment is this:

An automatic door at a store has a sensor in front (A0) and behind (A1). The
door opens (B0=1) when a person approaches from the front, and stays open as
long as a person is detected in front or behind. If the door is closed and a person
approaches from the behind, the door does not open. If the door is closed and a
person approaches from the front but a person is also detected behind, the door
does not open, to prevent hitting the person that is behind.

Specifically the first one.
When A0 = 1 then B0=1 and stays 1 as long as A0 or A1 are 1, but the next part says if A1=1 then B0=0. Here is my code so far
Code:

Code: 
void main()
{
   while (1) { 
       if(!A0 && !A1)
       {
           !B0;
       }
      if(A0 && !A1)
      {
            B0 = 1;
      }
      if (A1)
      {
            B0 = 0;
      }
      /*if (A1 && A0)
      {
            !B0;
      }*/
   }
}

the current outcome. Right now when I flip A0, B0 lights up but when I flip A0 back and flip A1, B0 shuts off. Then when I set both A0 and A1 to 1, B0 starts flashing.
Thank you in advanced. Also if anyone knows how to use the RIBS software or knows a good tutorial may you please share. Thanks!
 

you are doing each test in seqience so a following test may invert a previous test therefore B0 flashes - try some les e statements, e.g
Code: 
      if (A1)
      {
            B0 = 0;
      }
     else
      if (A1 && A0)
      {
            !B0;
      }
 

man did that help! Thanks a ton. Here's the final code, if anyone could run it and see if it meets the qualifications or if you have any input, it is appreciated and welcome. Thanks again!

Code: 
#include "rims.h"

int main()
{
   while (1) 
   {
    if (!B0)
    {
        if (A0 && !A1)
        {
            B0=1;
            if (B0 && A1)
            {
                B0=1;
            }
            else if (!A0 && A1)
            {
                B0 = 0;
            }
            else if (!B0 && A1)
            {
                 if(A0)
                 {
                     B0=0;
                 }
            }
            
   
        }
        
    } 
    else if (!A0 && !A1)
    {
        B0=0;
    }
    
    
   }
}
 

Explain the conditions you need and also the value of required B0 for different conditions. I will write a working code.
 

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