Comment Comment by not_the_fda Embedded is a PIA, its not web development and shouldn't be treated as such.Printf isn't re-entrant, and they are calling it from multiple threads.There are solutions with trade offs: https://interrupt.memfault.com/blog/printf-on-embeddedEverything in embedded is a tradeoff of space, performance, or cost.If you come at it as web development with IO you are going to have a very bad time. parent not_the_fda 2 years ago
Printf isn't re-entrant, and they are calling it from multiple threads.
There are solutions with trade offs: https://interrupt.memfault.com/blog/printf-on-embedded
Everything in embedded is a tradeoff of space, performance, or cost.
If you come at it as web development with IO you are going to have a very bad time.