CCS/CC1350STK: Hard Faulting when using "to_string" or an ITOA Function

Zachary Asmussen

Part Number: CC1350STK
Other Parts Discussed in Thread: CC1350

Tool/software: Code Composer Studio

Hello,

I have been developing firmware for our own custom board using the CC1350 in Code Composer studio. Our project relies on an LCD library using C++ so we are using strings. I grab sensor data as doubles and convert those using this third party LCD's ITOA function to display out. It worked great, although once I combined this LCD project with our BLE project every time I try using an ITOA function I get a hard fault shortly after it converts it. Looking at the string it looks perfectly fine, it has all the correct characters and is identical to a string if I set it directly myself (meaning this only happens when using the third party ITOA). I tried using the C++ to_string library function and get the same hard fault.

Below is the snippet of code I am looking at with 719 line being the issue. If it is commented out it runs fine, but of course undesirably as I need to dynamically change data.

Thank you for your time!

over 5 years ago

0 Tomasz Kocon over 5 years ago

Guru 26200 points

Do you have enough heap space?

0 Keith Barkley over 5 years ago in reply to Tomasz Kocon

Guru 35620 points

Or too little Stack space.

0 Zachary Asmussen over 5 years ago in reply to Keith Barkley

Prodigy 110 points

Thank you for your responses!

I fiddled with adding more heap and stack space in the project options to no avail, it appears it's happening on the part of the ITOA function that uses sprintf. No idea why, but I have my own ITOA that doesn't use strings now and it works better, but hard faults intermittently after 10 or so minutes.

0 Keith Barkley over 5 years ago in reply to Zachary Asmussen

Guru 35620 points

C++ is not a good mix with an MCU. It is much better to use C where you have marginally better control over memory footprint.

0 IUsedToBeARealPerson (M-W) over 5 years ago in reply to Zachary Asmussen

TI__Guru 58425 points

When you experience the hard fault, have you tried using the CCS ROV to inspect the Hwi exception and the root of it?

0 IUsedToBeARealPerson (M-W) over 4 years ago in reply to IUsedToBeARealPerson (M-W)

TI__Guru 58425 points

Hi Z,

I'm closing the thread due to inactivity, if you have any additional information, feel free to continue posting it here or open up a new thread using the "Ask a related question" button.

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CCS/CC1350STK: Hard Faulting when using "to_string" or an ITOA Function