After the single chip microcomputer is connected to the computer through SPI to USB, can it be debugged with serial assistant? Or use another program?
After the MCU is connected to the computer through SPI to USB, it can't be debugged with the serial assistant, because the serial assistant is used for serial communication. After the MCU is connected to the computer through SPI to USB, the communication follows the USB communication protocol. You can download USB debugging assistant for debugging, similar to using serial assistant.