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USB Superspeed Peripherals

1 Solution
Employee

你可以参考如下的步骤(就不翻译了)

  1. After the FX3 device gets connected to a Type-C host, the FX3 device gets powered.
  2. Once powered, the firmware starts running inside FX3.
  3. Configure the GPIO as an output that is used as a MUXSEL line.
  4. Before the USB connect, the USB2.0 PHY is disabled in the firmware.
  5. Then, the firmware attempts a USB 3.0 connection.
  6. If it finds the terminations, it will enumerate as a SuperSpeed device.
  7. If it does not find a termination. It will enable a USB2.0 PHY.
  8. Then the MUXSEL GPIO is toggled by FX3 in order to change the Mux switch position.
  9. Again, the firmware attempts a USB3.0 connection/.
  10. If it is a USB 3.0 device, it will enumerate as a USB 3.0 device or else it will enumerate as a USB 2.0 device.

The code snippet snapshot for the above mentioned flowchart is as under:

1.png

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1 Reply
Employee

你可以参考如下的步骤(就不翻译了)

  1. After the FX3 device gets connected to a Type-C host, the FX3 device gets powered.
  2. Once powered, the firmware starts running inside FX3.
  3. Configure the GPIO as an output that is used as a MUXSEL line.
  4. Before the USB connect, the USB2.0 PHY is disabled in the firmware.
  5. Then, the firmware attempts a USB 3.0 connection.
  6. If it finds the terminations, it will enumerate as a SuperSpeed device.
  7. If it does not find a termination. It will enable a USB2.0 PHY.
  8. Then the MUXSEL GPIO is toggled by FX3 in order to change the Mux switch position.
  9. Again, the firmware attempts a USB3.0 connection/.
  10. If it is a USB 3.0 device, it will enumerate as a USB 3.0 device or else it will enumerate as a USB 2.0 device.

The code snippet snapshot for the above mentioned flowchart is as under:

1.png

View solution in original post

0 Likes
Reply