USB class - DFU(Device Firmware Upgrade)

아이폰이나 아이패드에서 DFU 어쩌구 하길래 들어본적은 있는데

먼가해서 찾아본 건 아니고..

부트로더 관련해서 보다 보니(tivaware bootloader)

Three update protocols are utilized. On UART, SSI, I2C, and CAN, a custom protocol is used to communicate with the download utility to transfer the firmware image and program it into flash. When using Ethernet or USB DFU, however, different protocols are employed. On Ethernet the standard bootstrap protocol (BOOTP) is used and for USB DFU, updates are performed via the standard Device Firmware Upgrade (DFU) class.

이런게 보여서 검색해보니..

USB HID class 처럼 

USB DFU class가 존재하는 표준으로 제공되는 클래스 이다.

[링크 : https://cscott.net/usb_dev/data/devclass/usbdfu10.pdf]

USB Device Firmware Upgrade (DFU) is an official USB device class specification of the USB Implementers Forum. It specifies a vendor and device independent way of updating the firmware of a USB device. The idea is to have only one vendor-independent firmware update tool as part of the operating system, which can then (given a particular firmware image) be downloaded into the device.

[링크 : http://wiki.openmoko.org/wiki/USB_DFU_-_The_USB_Device_Firmware_Upgrade_standard]

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[링크 : http://www.usb.org/developers]