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STM32F777: Strange NETCONN behavior?

Dimonira
Associate II

Hello!

There are two FreeRTOS tasks, each of which creates its own NETCONN object. In one task (the first one begins to execute) there are no oddities when creating a NETCONN object. And in the second task there is: the object returned by netconn_new contains the incorrect address of the pcb union - it seems to be back to front.

I went step by step into the netconn_new_with_proto_and_callback function (it is called when netconn_new), the conn object is created absolutely normal in it:

0690X00000AQuwwQAD.png

But in the next step, when its address returns to the function call point, the debugger shows the NETCONN object with the incorrect pcb address:

0690X00000AQuxLQAT.png

Further, at the very first attempt to use, for example, p UdpConn-> pcb.udp-> loc al_ip, the processor goes into the hardware error handler.

Why it happens? The task stack increased - it did not help.

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