Introduction

The AVer HID In-System-Programming plugin is used for various products that can be updated using a proprietary HID protocol.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a packed binary file format.

This plugin supports the following protocol ID:

• com.aver.hid

GUID Generation

These devices use the standard DeviceInstanceId values, e.g.

• USB\VID_2574&PID_09F0

Update Behavior

The device is updated using a HID request/response with a fixed size payload.

Once ready, the plugin can start the update with the UVCX_UCAM_ISP_FILE_START header. After the device sends back the UVCX_UCAM_ISP_FILE_START packet, the PC process can send the firmware file in chunks using UVCX_UCAM_ISP_FILE_DNLOAD. After the last chunk, the plugin sends UVCX_UCAM_ISP_FILE_END packet and the device will check whether the firmware is valid. If the firmware file is correct, the device will send UVCX_UCAM_ISP_START to PC, and the plugin can continuously send UVCX_UCAM_ISP_STATUS to get the ISP progress percentage.

If the firmware file is incorrect, the device sends UVCX_UCAM_ISP_STOP back to the plugin, and the ISP progress should be terminated. The PC process should go back to UVCX_UCAM_ISP_STATUS and restart the process if needed.

Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to USB:0x2574

External Interface Access

This plugin requires read/write access to /dev/bus/usb.

Version Considerations

This plugin has been available since fwupd version 1.9.2.

Owners

Anyone can submit a pull request to modify this plugin, but the following people should be consulted before making major or functional changes:

• Pierce Wang: PierceWangAVer