新颖的烧录程序方式

USB Host Programming

You can program the FPGA from a pen drive attached to the USB-HID port (J2) by doing the following:

  1. 1. Format the storage device (Pen drive) with a FAT32 file system.
  2. 2. Place a single .bit configuration file in the root directory of the storage device.
  3. 3. Attach the storage device to the Basys3.
  4. 4. Set the JP1 Programming Mode jumper on the Basys3 to “USB”.
  5. 5. Push the PROG button or power-cycle the Basys3.

The FPGA will automatically be configured with the .bit file on the selected storage device. Any .bit files that are not built for the proper Artix-7 device will be rejected by the FPGA. The Auxiliary Function Status, or “BUSY” LED (LD16), gives visual feedback on the state of the configuration process when the FPGA is not yet programmed:

  • When steadily lit the auxiliary microcontroller is either booting up or currently reading the configuration medium (pen drive) and downloading a bitstream to the FPGA.
  • A slow pulse means the microcontroller is waiting for a configuration medium to be plugged in.
  • In case of an error during configuration the LED will blink rapidly.

When the FPGA has been successfully configured, the behavior of the LED is application-specific. For example, if a USB keyboard is plugged in, a rapid blink will signal the receipt of an HID input report from the keyboard.

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