State Machine

The control6/control6.src contains:

CONTROL_START

ECMD_GLOBAL(state,255);
ECMD_GLOBAL(c,0);

PIN_INPUT(Key_green)
PIN_INPUT(Key_red)
PIN_OUTPUT(LED_green)
PIN_OUTPUT(LED_red)
PIN_OUTPUT(Pulserelais_on)
PIN_OUTPUT(Pulserelais_off)

THREAD(states)
   ON state==0 DO
      PIN_SET(LED_red);
      PIN_CLEAR(LED_green);
      PIN_SET(Pulserelais_off);
      ESEND(192.168.28.1, "Off\");
      state=10;
      c=0;
   END
   ON state==10 DO
      c=c+1;
      ON c==20 DO
         c=0;
         PIN_CLEAR(Pulserelais_on);
         PIN_CLEAR(Pulserelais_off);
         state=100;
      END
   END

   ON state==1 DO
      PIN_SET(LED_green);
      PIN_CLEAR(LED_red);
      PIN_SET(Pulserelais_on);
      ESEND(192.168.28.1, "On\");
      state=11;
      c=0;
   END
   ON state==11 DO
      c=c+1;
      ON c==20 DO
         c=0;
         PIN_CLEAR(Pulserelais_on);
         PIN_CLEAR(Pulserelais_off);
         state=101;
      END
   END

   ON state==2 DO
      PIN_CLEAR(LED_red);
      PIN_CLEAR(LED_green);
      ESEND(192.168.28.1, "Cleaning\");
      state=20;
   END
   ON state==20 DO
      c=c+1;
      ON c==15 DO
         PIN_SET(LED_green);
      END
      ON c==30 DO
         PIN_CLEAR(LED_green);
         c=0;
      END
   END
THREAD_END(states)

ON PIN_FALLING(Key_green) DO
   state=1;
END

ON PIN_FALLING(Key_red) DO
   ON state==101 DO
      state=2;
   END
   ON state==20 DO
      state=0;
   END
END

ON STARTUP DO
   ESEND(192.168.28.1, "Start\");
   state=0;
   THREAD_RESTART(states);
END

CONTROL_END

The pinning/named_pin/default file should be:

PC0     INPUT   LOW             Key_green       
PC1     INPUT   LOW             Key_red       
PC2     OUTPUT  HIGH            LED_green
PC3     OUTPUT  HIGH            LED_red 
PC4     OUTPUT  HIGH            Pulserelais_on  
PC5     OUTPUT  HIGH            Pulserelais_off

and "Named pin configuration" must be switched on and use the file "default".

This is a state machine to control a pulse relais with two coils for a coffeemachine. I always had the problem that when I clean the machine in the evening, I have to wait about 10 minutes and then I can switch it off.

With ethersex it works like this: If you press the green button the machine is switched on and the green LED comes up. At the same time the server gets the message "On". If you press the red button it sends a message "Cleaning" to the server and starts to flash the green LED. After about 10 minutes the relais is switched off by the server. If you press the button again while the green led flashes it sends "Off" and switches the relais off. Then the red led comes on. The server can control the circuit by sending a message like this:

echo "c6 set state 1" | netcat -q1 coffeemachine 2701

To check the status it should send something like:

echo "c6 get state" | netcat -q1 coffeemachine 2701

Is the answer e.g. "state 100" the machine is off. The job is done without timers because there was no space left in the device. With TCP, control6, named pins and rfm12 it nearly takes 16K and fits in a Atmega168.