RE: Do threads yield during synchronous operations?

Amanda Hsieh — Wed, 11 Sep 2024 13:12:05 GMT

Hi,

When a thread calls a blocking synchronous function, such as i2c_write_dt or i2c_burst_read_dt, the thread will indeed yield and another thread can run while the first one is blocked. This is because these high-level calls accessed through device-specific APIs are usually intended as synchronous and thus, they should be blocked. See Thread life cycle.

You can take a look at the nRF Connect SDK Fundamentals course and nRF Connect SDK Intermediate course which provides a comprehensive overview of these topics, including hands-on exercises to practice creating threads, thread yielding and sleeping, and offloading work to a workqueue.

Regards,
Amanda H.