Hello I'm working on stm32f10x but some times it hangs or jumps to unknown location or I missed my Ethernet connection abruptly. I want to know how can do full debug with keil and JTAG (I use J-link programmer and debugger)? for example I need to know 1)which function and line was the last function or line before MCu got hang? 2)how can debug network interface socket?(I have read www.keil.com/.../network_create_app.html but I can't understand how to debug)