From 60b30c036397cb5627fa374bb930794b225daa29 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Fri, 7 Jul 2017 11:55:23 -0400 Subject: Squashed 'lib/lufa/' content from commit 385d40300 git-subtree-dir: lib/lufa git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b --- .../AndroidAccessoryHost/DeviceDescriptor.c | 67 ++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 Demos/Host/LowLevel/AndroidAccessoryHost/DeviceDescriptor.c (limited to 'Demos/Host/LowLevel/AndroidAccessoryHost/DeviceDescriptor.c') diff --git a/Demos/Host/LowLevel/AndroidAccessoryHost/DeviceDescriptor.c b/Demos/Host/LowLevel/AndroidAccessoryHost/DeviceDescriptor.c new file mode 100644 index 000000000..03841a990 --- /dev/null +++ b/Demos/Host/LowLevel/AndroidAccessoryHost/DeviceDescriptor.c @@ -0,0 +1,67 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaims all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * USB Device Descriptor processing routines, to determine the overall device parameters. Descriptors are special + * computer-readable structures which the host requests upon device enumeration, to determine information about + * the attached device. + */ + +#include "DeviceDescriptor.h" + +/** Reads and processes an attached device's Device Descriptor, to determine compatibility + * + * This routine checks to ensure that the attached device's VID and PID matches Google's for Android devices. + * + * \return An error code from the \ref AndroidHost_GetDeviceDescriptorDataCodes_t enum. + */ +uint8_t ProcessDeviceDescriptor(void) +{ + USB_Descriptor_Device_t DeviceDescriptor; + + /* Send the request to retrieve the device descriptor */ + if (USB_Host_GetDeviceDescriptor(&DeviceDescriptor) != HOST_SENDCONTROL_Successful) + return DevControlError; + + /* Validate returned data - ensure the returned data is a device descriptor */ + if (DeviceDescriptor.Header.Type != DTYPE_Device) + return InvalidDeviceDataReturned; + + /* Check the product ID to determine if the Android device is in accessory mode */ + if ((DeviceDescriptor.ProductID != ANDROID_ACCESSORY_PRODUCT_ID) && + (DeviceDescriptor.ProductID != ANDROID_ACCESSORY_ADB_PRODUCT_ID)) + { + return NonAccessoryModeAndroidDevice; + } + + return AccessoryModeAndroidDevice; +} + -- cgit v1.2.3