           8x: 5 6
           6x: 6 5
           4x: 5 6
-      When weaving, the "xx" line would be repeated indefinitely until a button is pushed.
+      When weaving, the "xx" line would be repeated indefinitely until a button is pushed to advance.
       Either this "treadle loop" notation or a reconstructed "treadle sequence" notation could be displayed.
       The 7-digit display could show how far along in a repeat sequence we are.
       The file format would have to be elaborated to be able to save and load these looped treadle sequences.

   #endif
   if (DEBUG) {
      if (digitalRead(PB4) == LOW) // magic: if black button is down during powerup
        erase_EEPROM();            // then maybe erase the memory
      dump_file( "initial state");
      Serial.print("config size:"); Serial.println(CONFIG_SIZE);
      Serial.print("file size:"); Serial.println(FILE_SIZE); }

                                  - clean up compiler warnings
   10 Feb 2017, L. Shustek, V1.3  - separate motor hardware config, and don't write it to memory
                                  - better debugging output
                                  - parametrize CW/CCW motor initialization
                                  - highlight the treadle while weaving, not just the line
*/

/* TODO:
