Hi Everyone,
I use Usb to Serial adaptor to communicate between Pic and PC. I noticed that when I fire the coil without the high tension lead and spark plug (the spark jumps to the secondary earth wire that goes to the battery negative terminal) my Usb to Serial adaptor locks up and I have to reconnect it on the usb side. But if I communicate with stand alone Pic powered from a separate power supply and trigger the coil from my circuit everything works fine.
I tried to Debug Status and Pcon registers to determine the cause of the reset. When I disconnect power or ground the MCLR pin it doesn’t change the registers. I attached the code. Can someone have a look at it please
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