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  VS Arduino › Visual Micro › Usb/Serial/WiFi Debugging › Breakpoint... Break/Pause
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Normal Topic Breakpoint... Break/Pause (Read 6058 times)
Gary12
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Breakpoint... Break/Pause
Dec 21st, 2013 at 4:57pm
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Aside from being able to examine hardware, is there anything else I should be able to do? For instance examine variables...
  
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Tim@Visual Micro
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Re: Breakpoint... Break/Pause
Reply #1 - Dec 21st, 2013 at 5:50pm
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Hi Gary,

Yes you can examine variables and you can also update them while the Arduino is running or when it is paused at a breakPoint. 

The "When Hit" breakpoint property is used to identify the variables/expressions to be "watched". (Recompile and upload is required after changing breakpoint properties).

Breakpoint "When hit" examples (all {var/expr} become watched expressions)

Code
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{millis()}{foo1}


or

Code
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This is a breakpoint message combined with data {millis()} and foo1 is {foo1}


The docs do need more work but there is a lot of information on visualmicro.com. Click the "Visual Micro" tab at the top of this page.

Of note is the debugger overview and� YouTube video.

The wiki also contains additional information such as this article about how to modify the values of variables while the Arduino is running. 

Hope this helps?

Following shows highly configured breakpoint reporting with modifiable watch expressions

« Last Edit: Dec 21st, 2013 at 5:58pm by Tim@Visual Micro »  
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Gary12
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Re: Breakpoint... Break/Pause
Reply #2 - Dec 22nd, 2013 at 5:53am
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I must be missing something. I didn't see anything that described how you change the run time value of variables defined as follows in the breakpoint {i=?}... I tried changing the value of the variable in the expressions window, but the results were not what I expected. I changed i from 4 to 5, and it showed up next time through as 48... Can't figure out how to use this feature even after watching the videos, and reading the link you provided.

Frustrated...  Sad
  
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gelius59
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Re: Breakpoint... Break/Pause
Reply #3 - Dec 22nd, 2013 at 8:13am
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" changed i from 4 to 5, and it showed up next time through as 48..."

Sorry it looks like the wrong type of variable.
This may be a type byte.
Check the type of the variable in the control point.
Sincerely.
« Last Edit: Dec 22nd, 2013 at 12:45pm by gelius59 »  
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Tim@Visual Micro
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Re: Breakpoint... Break/Pause
Reply #4 - Dec 22nd, 2013 at 2:33pm
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Thanks gelius59

@Gary it sounds like your original question is answered and you can now see how to set watch expressions and other breakpoint properties?

Modifying running variables

When it comes to altering variables you do need to be aware of any special data types. Keep in mind that when values are sent to the pc from the Arduino the debugger uses (in background) Serial.print() which as you might know formats data to human readable. When updating variables Visual Micro does attempt to reverse the conversion but sounds like it isn't succeeding in your test.

Can you please give an example of the definition of the variable you are attempting to set so that we can test. Thanks


tip: you can also format data that is sent to the pc yourself if required using the same syntax as can be used normally with arduino serial as follows:-

{myVar,HEX}
{myVar,BIN}
etc
« Last Edit: Dec 22nd, 2013 at 2:35pm by Tim@Visual Micro »  
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Gary12
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Re: Breakpoint... Break/Pause
Reply #5 - Dec 22nd, 2013 at 9:26pm
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It was byte data, and when I used your formatting suggestion {VariableName,DEC=?} it worked as expected.

Thanks for your time!

I think the Debugger will be a big time saver, and will definitely purchase the license when my trial period is up.
  
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Tim@Visual Micro
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Re: Breakpoint... Break/Pause
Reply #6 - Dec 22nd, 2013 at 9:36pm
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Great thanks for the update and thanks again to gelius59 for the direction  Smiley
  
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