VS Arduino - Putting breakpoint in CPP file breaks code

Jul 11^th, 2025 at 11:53am (UTC)

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VS Arduino › Visual Micro › Usb/Serial/WiFi Debugging › Putting breakpoint in CPP file breaks code

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Putting breakpoint in CPP file breaks code (Read 5112 times)

IanS Junior Member Offline Posts: 14 Joined: Jun 29^th, 2016	Putting breakpoint in CPP file breaks code Aug 8^th, 2016 at 4:10pm	Print Post
	I am working on a large project and thus have multiple CPP and H files in addition to my loop in the .INO file. I am able to insert breakpoints anywhere in the INO file but if I insert them into any of my CPP files it breaks my entire code and nothing works. Everything freezes and it will not do anything. If in the same place I put the breakpoint I have a Serial.print() that works just fine. So, in theory debug should work. I am running a fairly normal code setup, although I am using the same interrupt that millis uses to debounce a couple buttons. Any reason why this would be happening?


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Tim@Visual Micro Administrator Offline Posts: 12191 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Putting breakpoint in CPP file breaks code Reply #1 - Aug 8^th, 2016 at 4:35pm	Print Post
	If you are using the millis() timer you could try switching off the throttle in the visual micro debugger project properties. ThrottleEnabled=False If that fails please switch on vMiro>compiler>show build folder Then email one of the cpp's that contains breakpoints after a debug upload. the cpp will be in the temp build folder. Thanks


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IanS Junior Member Offline Posts: 14 Joined: Jun 29^th, 2016	Re: Putting breakpoint in CPP file breaks code Reply #2 - Aug 8^th, 2016 at 4:49pm	Print Post
	Disabling the millis() throttle seems to have fixed it. Any reason why that was a causing an issue before? Was it stripping out my code that's in the same time interrupt as millis()? If I didn't miss it in the documentation would it be possible to add a note that you could run into issues if you're using CPP and H files and timer0?


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Tim@Visual Micro Administrator Offline Posts: 12191 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Putting breakpoint in CPP file breaks code Reply #3 - Aug 8^th, 2016 at 4:57pm	Print Post
	Hi see if this makes sense to you. First of all there is a note in the breakpoint docs about switching off the throttle if using timers and isr's but will check it is clear when I get a mo. there isn't a difference between .ino and .cpp. in fact .ino is saved into a .cppthen compiled. I suspect your timer code hadn't been hit when methods in the .ino were hit. All switching off throttle does is to prevent visual micro from using the standard aduino delay() method. The delay() is used to prevent two breakpoints from executing within approx 80-100ms of each other which prevents newer users from using non-breaking trace points inside a fast loop which then flood the pc with serial messages. Did your breakpoints break or just trace?


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IanS Junior Member Offline Posts: 14 Joined: Jun 29^th, 2016	Re: Putting breakpoint in CPP file breaks code Reply #4 - Aug 8^th, 2016 at 5:07pm	Print Post
	That makes sense. Yes, my code was actually breaking. With further testing I've found that even with throttling disabled I will continue to have breakpoint issues. It seems to be very dependent on what function and where I put the breakpoint. If I put it one spot everything. Yet, if I put the same breakpoint somewhere else it crashes the entire program..... So it seems I've got it partially working, but not to a point where its actually useful for what I need.


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Tim@Visual Micro Administrator Offline Posts: 12191 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Putting breakpoint in CPP file breaks code Reply #5 - Aug 8^th, 2016 at 5:10pm	Print Post
	Okay. what it does it clearly visible in the temp folder so should relatively easy to track. You can zip and email the build folder to info[at]visualmicro.com if you want me to look into it. By the way, did you use the free 45 day trial to test debug? Thanks
	« Last Edit: Aug 8^th, 2016 at 5:11pm by Tim@Visual Micro »

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