TCP Connection in Interrupt

[d-marson]

TCP Connection in Interrupt

[rsta2]

This behavior is intended. The networking functions have to run in a task context at TASK_LEVEL, because they may block, while waiting for some event from the network. In an IRQ handler at IRQ_LEVEL the execution cannot block, because an IRQ handler has to be finished as soon as possible, so that the system remains responsive on other arriving IRQs.

As a solution you can set a volatile flag in the IRQ handler, when the button is pressed, which is read in the main loop. When in the main loop the flag is read as set, the network connection is established there. The flag has to be reset then.

Thanks for appreciating Circle!

[d-marson]

Thank you for the rapid and detailed response, this is very helpful for our understanding!