arduino online grbl modified

First install plugin from here 

http://create.arduino.cc/getting-started/plugin

After installed plugin corectly , open https://create.arduino.cc/ and click arduino webeditor.

I modified in grbl 08c original >>config.h :

......

#define X_STEP_BIT         5  // Uno Digital Pin 2

#define Y_STEP_BIT         6  // Uno Digital Pin 3

#define Z_STEP_BIT         7  // Uno Digital Pin 4

#define X_DIRECTION_BIT    2  // Uno Digital Pin 5

#define Y_DIRECTION_BIT    3  // Uno Digital Pin 6

#define Z_DIRECTION_BIT    4  // Uno Digital Pin 7

.......

with

......

#define X_STEP_BIT         5  // Uno Digital Pin 2

#define Y_STEP_BIT         6  // Uno Digital Pin 3

#define Z_STEP_BIT         7  // Uno Digital Pin 4

#define X_DIRECTION_BIT    2  // Uno Digital Pin 5

#define Y_DIRECTION_BIT    3  // Uno Digital Pin 6

#define Z_DIRECTION_BIT    4  // Uno Digital Pin 7

....

Because my arduino cnc shield have  step with direction pin inversed.

Really i can inverse soldering some wiring ... but modifing software , leave shield intact!

and for my cnc some init commands:

in default.h 

....

  #define DEFAULT_X_STEPS_PER_MM 250.0

  #define DEFAULT_Y_STEPS_PER_MM 250.0

.....

with

.....

  #define DEFAULT_X_STEPS_PER_MM 340.0

  #define DEFAULT_Y_STEPS_PER_MM 340.0

......

        and 

.....

#define DEFAULT_FEEDRATE 250.0

.....

with

.....

  #define DEFAULT_FEEDRATE 150.0

.....

grbl 08c modificat     modificat.hex

grbl 08c original