/*\r
LUFA Library\r
- Copyright (C) Dean Camera, 2009.\r
+ Copyright (C) Dean Camera, 2010.\r
\r
dean [at] fourwalledcubicle [dot] com\r
www.fourwalledcubicle.com\r
*/\r
\r
/*\r
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, and distribute this software\r
- and its documentation for any purpose and without fee is hereby\r
- granted, provided that the above copyright notice appear in all\r
- copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting\r
- documentation, and that the name of the author not be used in\r
- advertising or publicity pertaining to distribution of the\r
+ Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+ Permission to use, copy, modify, distribute, and sell this \r
+ software and its documentation for any purpose is hereby granted\r
+ without fee, provided that the above copyright notice appear in \r
+ all copies and that both that the copyright notice and this\r
+ permission notice and warranty disclaimer appear in supporting \r
+ documentation, and that the name of the author not be used in \r
+ advertising or publicity pertaining to distribution of the \r
software without specific, written prior permission.\r
\r
The author disclaim all warranties with regard to this\r
this software.\r
*/\r
\r
+/** \file\r
+ *\r
+ * USB Device Configuration Descriptor processing routines, to determine the correct pipe configurations\r
+ * needed to communication with an attached USB device. Descriptors are special computer-readable structures\r
+ * which the host requests upon device enumeration, to determine the device's capabilities and functions.\r
+ */\r
+\r
#include "ConfigDescriptor.h"\r
\r
+/** Reads and processes an attached device's descriptors, to determine compatibility and pipe configurations. This\r
+ * routine will read in the entire configuration descriptor, and configure the hosts pipes to correctly communicate\r
+ * with compatible devices.\r
+ *\r
+ * This routine searches for a BT interface descriptor containing bulk IN and OUT data endpoints.\r
+ *\r
+ * \return An error code from the \ref Bluetooth_GetConfigDescriptorDataCodes_t enum.\r
+ */\r
uint8_t ProcessConfigurationDescriptor(void)\r
{\r
- uint8_t* ConfigDescriptorData;\r
- uint16_t ConfigDescriptorSize;\r
+ uint8_t ConfigDescriptorData[512];\r
+ void* CurrConfigLocation = ConfigDescriptorData;\r
+ uint16_t CurrConfigBytesRem;\r
uint8_t FoundEndpoints = 0;\r
- \r
- /* Get Configuration Descriptor size from the device */\r
- if (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful)\r
- return ControlErrorDuringConfigRead;\r
- \r
- /* Ensure that the Configuration Descriptor isn't too large */\r
- if (ConfigDescriptorSize > MAX_CONFIG_DESCRIPTOR_SIZE)\r
- return DescriptorTooLarge;\r
- \r
- /* Allocate enough memory for the entire config descriptor */\r
- ConfigDescriptorData = alloca(ConfigDescriptorSize);\r
\r
/* Retrieve the entire configuration descriptor into the allocated buffer */\r
- USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData);\r
+ switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))\r
+ {\r
+ case HOST_GETCONFIG_Successful:\r
+ break;\r
+ case HOST_GETCONFIG_InvalidData:\r
+ return InvalidConfigDataReturned;\r
+ case HOST_GETCONFIG_BuffOverflow:\r
+ return DescriptorTooLarge;\r
+ default:\r
+ return ControlError;\r
+ }\r
\r
- /* Validate returned data - ensure first entry is a configuration header descriptor */\r
- if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)\r
- return InvalidConfigDataReturned;\r
-\r
- /* The bluetooth USB transport addendium mandates that the data (not streaming voice) endpoints\r
+ /* The bluetooth USB transport addendum mandates that the data (not streaming voice) endpoints\r
be in the first interface descriptor (interface 0) */\r
- USB_GetNextDescriptorOfType(&ConfigDescriptorSize, &ConfigDescriptorData, DTYPE_Interface);\r
+ USB_GetNextDescriptorOfType(&CurrConfigBytesRem, &CurrConfigLocation, DTYPE_Interface);\r
\r
/* Ensure that an interface was found, and the end of the descriptor was not reached */\r
- if (!(ConfigDescriptorSize))\r
- return NoInterfaceFound;\r
+ if (!(CurrConfigBytesRem))\r
+ return NoBTInterfaceFound;\r
\r
/* Get the data IN, data OUT and event notification endpoints for the bluetooth interface */\r
while (FoundEndpoints != ((1 << BLUETOOTH_DATA_IN_PIPE) | (1 << BLUETOOTH_DATA_OUT_PIPE) |\r
(1 << BLUETOOTH_EVENTS_PIPE)))\r
{\r
/* Fetch the next endpoint from the current bluetooth interface */\r
- if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
- NextInterfaceBluetoothDataEndpoint))\r
+ if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,\r
+ DComp_NextInterfaceBluetoothDataEndpoint))\r
{\r
/* Descriptor not found, error out */\r
return NoEndpointFound;\r
}\r
\r
- USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);\r
+ USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);\r
\r
/* Check if the endpoint is a bulk or interrupt type endpoint */\r
if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)\r
return SuccessfulConfigRead;\r
}\r
\r
-uint8_t NextInterfaceBluetoothDataEndpoint(void* CurrentDescriptor)\r
+uint8_t DComp_NextInterfaceBluetoothDataEndpoint(void* CurrentDescriptor)\r
{\r
/* PURPOSE: Find next interface endpoint descriptor before next interface descriptor */\r
\r
projects / pub / USBasp.git / blobdiff