Enabling FPU causes device to reboot

RE: Enabling FPU causes device to reboot

Susheel Nuguru — Wed, 09 Oct 2024 07:04:15 GMT

Try this

# Debugging configuration
CONFIG_THREAD_NAME=y
CONFIG_THREAD_ANALYZER=y
CONFIG_THREAD_ANALYZER_AUTO=y
CONFIG_THREAD_ANALYZER_RUN_UNLOCKED=y
CONFIG_THREAD_ANALYZER_USE_PRINTK=y

# Add asserts
CONFIG_ASSERT=y
CONFIG_ASSERT_VERBOSE=y
CONFIG_ASSERT_NO_COND_INFO=n
CONFIG_ASSERT_NO_MSG_INFO=n
CONFIG_RESET_ON_FATAL_ERROR=n
CONFIG_THREAD_NAME=y

Also try the breakpoint on sys_reboot and starting your program in the debug mode to attempt to hit the breakpoint and looking at the function call stack to understand the context of the reboots. We need to get the context of reboot one way or the other to get a proper debugging direction here.

RE: Enabling FPU causes device to reboot

IvanR — Tue, 08 Oct 2024 10:40:14 GMT

CONFIG_LOG=y

gives no info. Which logs options should I enable?

RE: Enabling FPU causes device to reboot

Susheel Nuguru — Tue, 08 Oct 2024 09:02:14 GMT

[quote user=""]Any ideas why enabling FPU would cause it? Thanks![/quote]

It would be best to first understand the nature of the reboot. If it is a softreset, then you should be able to put a breakpoint in sys_reboot function, start the application in debugger and try to understand the context of this reboot. If it is hardfault then you should enable the more logs to catch some serial logs to get the nature of the hardfault.