Good day!
It seems I know why it does not work.
Because I bought the board in China
When I installed the driver from Arduino.
It ceases to work even in Arduino IDE.
I decided not to torture myself or yourself)
I thought I'll upload sketches via port (Native CSS)
And debug the port through the Program.
But it did not help.
That's what happens.
If I connect both ports, debugging does not stop at the breakpoint.And if you leave it connected only to Native USB , everything works.
Maybe I did not set up work with the second port?
Help me how to do this?
I see a peculiarity when working with one or two ports.
When the card is connected only via the Native USB port
The driver is called Arduino DUE and is connected to COM10
When I connect the second port, the driver for the Native USB is called the Bossf program port and connected via another COM port
If you want I can help you understand why the Chinese driver is not loaded sketch. I can send debugging information.
Now I will learn how to debug the CSS USB TTL converter.