Accessory booting over USB

摘要

Methods, systems, and apparatuses for booting an accessory with an accessory firmware image received from a host device are described. When the host device detects a connection between the accessory and the host device, the host device may send a request for an accessory identifier to the accessory. The accessory may send an accessory identifier to the host device in response. The host device may select an accessory firmware image that is suitable for the accessory, and may transmit the accessory firmware image to the accessory. The accessory firmware image may include information that the accessory can use to enable the accessory to exchange application data with the host device.

主权项

1. A method for booting an accessory using a host device that includes a host firmware image and a plurality of accessory firmware images stored therein, the method comprising:
detecting, by the host device, a connection between the host device and the accessory; sending, by the host device to the accessory, a request for an accessory identifier; receiving, by the host device from the accessory, the accessory identifier; selecting, by the host device, an accessory firmware image, from among the plurality of accessory firmware images, based at least in part on the accessory identifier, wherein the selected accessory firmware image includes information usable by the accessory to establish an operating system running on the accessory and transmitting, by the host device to the accessory, the selected accessory firmware image.