Requesting help for Stepper motor block

[smallbot]

Hi everyone,

This is my first attempt at blockly. I would like to generate a gcode with Blockly and send that via serail port to Arduino. 

So far, I understand how to create custom blocks and created a very simple block with steps and speed variables. 

 But I don't know how to generate a corresponding Gcode (for example X100 S10, X100 means to move 100 steps and S10 means speed is 10rpm) within the code generator. I know that I have to write just a single line  below this line, but I have no idea how to do that.

 // TODO: Assemble JavaScript into code variable.

I have looked in the below link for reference, but in that link he was sending an http request, not generating any Gcode type stuff. 

http://www.hairyraho.com/blockly-create-new-block/

Please help me to complete this project. Many thanks in advance.

My block's langauge code is:

Blockly.Blocks['move_stepper'] = {
  init: function() {
    this.appendValueInput("steps")
        .setCheck("Number")
        .appendField(new Blockly.FieldTextInput("steps"), "steps");
    this.appendValueInput("speed")
        .setCheck("Number")
        .appendField(new Blockly.FieldTextInput("speed"), "speed");
    this.setInputsInline(true);
    this.setPreviousStatement(true, null);
    this.setNextStatement(true, null);
    this.setColour(100);
    this.setTooltip('');
    this.setHelpUrl('http://www.example.com/');
  }
};

and the corresponding Javascript is:

Blockly.JavaScript['move_stepper'] = function(block) {
  var text_steps = block.getFieldValue('steps');
  var value_steps = Blockly.JavaScript.valueToCode(block, 'steps', Blockly.JavaScript.ORDER_ATOMIC);
  var text_speed = block.getFieldValue('speed');
  var value_speed = Blockly.JavaScript.valueToCode(block, 'speed', Blockly.JavaScript.ORDER_ATOMIC);
  // TODO: Assemble JavaScript into code variable.
  var code = '...;\n';
  return code;
};

[Wolfgang Koehler]

see if my reply here helps: https://groups.google.com/forum/#!topic/blockly/EouLdHA1fds

[Miroslav Lazarevic]

I dunno is this the same for what you are asking but here https://anibit.com/webtools/3pi/ is a complete project that use blockly for Arduino programming. You can see how they are made it because whole source code for that project is hosted on github. There is a also Scratch for Arduino look this video https://www.youtube.com/watch?v=5RhRf_yhsrM Hope this could help you.

[smallbot]

Hi Wolfgang. Thanks for the link, but I think I am really a noob to understand the answer in full, I will try this weekend.

[smallbot]

Hi Miroslav,

Thanks for your reply. I am aware of scratch, but I would like to just send serial commands to Arduino, not to flash Arduino everytime.