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Max Tasks
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Rookie
Joined: Sun Feb 23, 2014 3:56 pm Posts: 8 
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 Max TasksI have received an error indicating the maximum number of tasks is limited to 5... Is this correct?
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| Thu Mar 06, 2014 9:59 pm |
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Moderator   Joined: Wed Mar 05, 2008 8:14 am Posts: 3163 Location: Rotterdam, The Netherlands
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Re: Max Tasks Yes, according to LoadBuildOptionsVEXIQ.h, it's 5:
= Xander _________________ | Professional Conduit of Reasonableness | (Title bestowed upon on the 8th day of November, 2013) | My Blog: I'd Rather Be Building Robots | ROBOTC 3rd Party Driver Suite: [Project Page] |
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| Fri Mar 07, 2014 3:26 am |
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Rookie
Joined: Sun Feb 23, 2014 3:56 pm Posts: 8
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Re: Max Tasks Is this something that is limited by the capabilities of the VexIQ brain?
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| Fri Mar 07, 2014 4:42 pm |
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Site Admin  Joined: Wed Jan 24, 2007 10:42 am Posts: 601
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Re: Max Tasks Yep - each task that's running needs it's own stack/call space. ROBOTC only has about 16KB of the 32KB of RAM available to us (VEX's 'master firmware' uses the rest for things like radio/I2C buffers). So if we were to leave a reasonable of memory for each task (approx 2K per task), plus the ROBOTC overhead, that affects the number of tasks/threads we can run.
The VEX IQ supports 5 tasks: 1 "main" and 4 "user" tasks. There is a bug in the current build that "main" isn't being counted by the compiler when it compile-time allocates memory for each task. |
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| Fri Mar 07, 2014 4:48 pm |
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Rookie
Joined: Sun Feb 23, 2014 3:56 pm Posts: 8
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Re: Max Tasks Ok, so if the individual tasks are very small and the total code size would remain under ~10k it shouldn’t present any problems… correct?
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| Fri Mar 07, 2014 5:07 pm |
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