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PORT1 &= ~0x20;            /* set P1.5 to zero: Key Input */ 
 
/* define a debug function for the pedestrian push button */ 
signal void push_key (void)  { 
  PORT1 |=  0x20;          /* set P3.0       */ 
  twatch (`Clock*0.05);    /* wait 50 msec   */ 
  PORT1 &= ~0x20;          /* reset P3.0     */ 
} 
 
/* define a toolbar button to call push_key */ 
define button "Push for Walk", "push_key ()" 
 
RADIX=10 // decimal output in watch window