-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2010.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\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
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\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 MIDI interface descriptor pair containing bulk data IN and OUT endpoints.\r
- *\r
- * \return An error code from the \ref MIDIHost_GetConfigDescriptorDataCodes_t enum.\r
- */\r
-uint8_t ProcessConfigurationDescriptor(void)\r
-{\r
- uint8_t ConfigDescriptorData[512];\r
- void* CurrConfigLocation = ConfigDescriptorData;\r
- uint16_t CurrConfigBytesRem;\r
- uint8_t FoundEndpoints = 0;\r
-\r
- /* Retrieve the entire configuration descriptor into the allocated buffer */\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
- /* Get the MIDI Audio Streaming interface from the configuration descriptor */\r
- if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,\r
- DComp_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
- {\r
- /* Descriptor not found, error out */\r
- return NoCDCInterfaceFound;\r
- }\r
- \r
- /* Get the IN and OUT data endpoints for the MIDI interface */\r
- while (FoundEndpoints != ((1 << MIDI_DATAPIPE_IN) | (1 << MIDI_DATAPIPE_OUT)))\r
- {\r
- /* Fetch the next bulk endpoint from the current MIDI streaming interface */\r
- if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,\r
- DComp_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)\r
- {\r
- /* Descriptor not found, error out */\r
- return NoEndpointFound;\r
- }\r
- \r
- USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);\r
-\r
- /* Check if the endpoint is a bulk IN or bulk OUT endpoint */\r
- if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)\r
- {\r
- /* Configure the data IN pipe */\r
- Pipe_ConfigurePipe(MIDI_DATAPIPE_IN, EP_TYPE_BULK, PIPE_TOKEN_IN,\r
- EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);\r
- \r
- /* Set the flag indicating that the data IN pipe has been found */\r
- FoundEndpoints |= (1 << MIDI_DATAPIPE_IN);\r
- }\r
- else\r
- {\r
- /* Configure the data OUT pipe */\r
- Pipe_ConfigurePipe(MIDI_DATAPIPE_OUT, EP_TYPE_BULK, PIPE_TOKEN_OUT,\r
- EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);\r
- \r
- /* Set the flag indicating that the data OUT pipe has been found */\r
- FoundEndpoints |= (1 << MIDI_DATAPIPE_OUT);\r
- }\r
- }\r
-\r
- /* Valid data found, return success */\r
- return SuccessfulConfigRead;\r
-}\r
-\r
-/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's\r
- * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration\r
- * descriptor processing if an incompatible descriptor configuration is found.\r
- *\r
- * This comparator searches for the next Interface descriptor of the correct MIDI Streaming Class, Subclass and Protocol values.\r
- *\r
- * \return A value from the DSEARCH_Return_ErrorCodes_t enum\r
- */\r
-uint8_t DComp_NextMIDIStreamingInterface(void* CurrentDescriptor)\r
-{\r
- if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)\r
- {\r
- /* Check the MIDI descriptor class, subclass and protocol, break out if correct data interface found */\r
- if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == MIDI_STREAMING_CLASS) &&\r
- (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == MIDI_STREAMING_SUBCLASS) &&\r
- (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == MIDI_STREAMING_PROTOCOL))\r
- {\r
- return DESCRIPTOR_SEARCH_Found;\r
- }\r
- }\r
- \r
- return DESCRIPTOR_SEARCH_NotFound;\r
-}\r
-\r
-/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's\r
- * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration\r
- * descriptor processing if an incompatible descriptor configuration is found.\r
- *\r
- * This comparator searches for the next bulk IN or OUT endpoint within the current interface, aborting the search if\r
- * another interface descriptor is found before the required endpoint.\r
- *\r
- * \return A value from the DSEARCH_Return_ErrorCodes_t enum\r
- */\r
-uint8_t DComp_NextMIDIStreamingDataEndpoint(void* CurrentDescriptor)\r
-{\r
- if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)\r
- {\r
- uint8_t EndpointType = (DESCRIPTOR_CAST(CurrentDescriptor,\r
- USB_Descriptor_Endpoint_t).Attributes & EP_TYPE_MASK);\r
- \r
- /* Check the endpoint type, break out if correct BULK type endpoint found */\r
- if (EndpointType == EP_TYPE_BULK)\r
- return DESCRIPTOR_SEARCH_Found;\r
- }\r
- else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)\r
- {\r
- return DESCRIPTOR_SEARCH_Fail;\r
- }\r
-\r
- return DESCRIPTOR_SEARCH_NotFound;\r
-}\r
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2010 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 disclaim 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 Configuration Descriptor processing routines, to determine the correct pipe configurations
+ * needed to communication with an attached USB device. Descriptors are special computer-readable structures
+ * which the host requests upon device enumeration, to determine the device's capabilities and functions.
+ */
+
+#include "ConfigDescriptor.h"
+
+/** Reads and processes an attached device's descriptors, to determine compatibility and pipe configurations. This
+ * routine will read in the entire configuration descriptor, and configure the hosts pipes to correctly communicate
+ * with compatible devices.
+ *
+ * This routine searches for a MIDI interface descriptor pair containing bulk data IN and OUT endpoints.
+ *
+ * \return An error code from the \ref MIDIHost_GetConfigDescriptorDataCodes_t enum.
+ */
+uint8_t ProcessConfigurationDescriptor(void)
+{
+ uint8_t ConfigDescriptorData[512];
+ void* CurrConfigLocation = ConfigDescriptorData;
+ uint16_t CurrConfigBytesRem;
+ uint8_t FoundEndpoints = 0;
+
+ /* Retrieve the entire configuration descriptor into the allocated buffer */
+ switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
+ {
+ case HOST_GETCONFIG_Successful:
+ break;
+ case HOST_GETCONFIG_InvalidData:
+ return InvalidConfigDataReturned;
+ case HOST_GETCONFIG_BuffOverflow:
+ return DescriptorTooLarge;
+ default:
+ return ControlError;
+ }
+
+ /* Get the MIDI Audio Streaming interface from the configuration descriptor */
+ if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+ DComp_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ /* Descriptor not found, error out */
+ return NoCDCInterfaceFound;
+ }
+
+ /* Get the IN and OUT data endpoints for the MIDI interface */
+ while (FoundEndpoints != ((1 << MIDI_DATAPIPE_IN) | (1 << MIDI_DATAPIPE_OUT)))
+ {
+ /* Fetch the next bulk endpoint from the current MIDI streaming interface */
+ if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+ DComp_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ /* Descriptor not found, error out */
+ return NoEndpointFound;
+ }
+
+ USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
+
+ /* Check if the endpoint is a bulk IN or bulk OUT endpoint */
+ if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+ {
+ /* Configure the data IN pipe */
+ Pipe_ConfigurePipe(MIDI_DATAPIPE_IN, EP_TYPE_BULK, PIPE_TOKEN_IN,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ /* Set the flag indicating that the data IN pipe has been found */
+ FoundEndpoints |= (1 << MIDI_DATAPIPE_IN);
+ }
+ else
+ {
+ /* Configure the data OUT pipe */
+ Pipe_ConfigurePipe(MIDI_DATAPIPE_OUT, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ /* Set the flag indicating that the data OUT pipe has been found */
+ FoundEndpoints |= (1 << MIDI_DATAPIPE_OUT);
+ }
+ }
+
+ /* Valid data found, return success */
+ return SuccessfulConfigRead;
+}
+
+/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
+ * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
+ * descriptor processing if an incompatible descriptor configuration is found.
+ *
+ * This comparator searches for the next Interface descriptor of the correct MIDI Streaming Class, Subclass and Protocol values.
+ *
+ * \return A value from the DSEARCH_Return_ErrorCodes_t enum
+ */
+uint8_t DComp_NextMIDIStreamingInterface(void* CurrentDescriptor)
+{
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ /* Check the MIDI descriptor class, subclass and protocol, break out if correct data interface found */
+ if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == MIDI_STREAMING_CLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == MIDI_STREAMING_SUBCLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == MIDI_STREAMING_PROTOCOL))
+ {
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ }
+
+ return DESCRIPTOR_SEARCH_NotFound;
+}
+
+/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
+ * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
+ * descriptor processing if an incompatible descriptor configuration is found.
+ *
+ * This comparator searches for the next bulk IN or OUT endpoint within the current interface, aborting the search if
+ * another interface descriptor is found before the required endpoint.
+ *
+ * \return A value from the DSEARCH_Return_ErrorCodes_t enum
+ */
+uint8_t DComp_NextMIDIStreamingDataEndpoint(void* CurrentDescriptor)
+{
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
+ {
+ uint8_t EndpointType = (DESCRIPTOR_CAST(CurrentDescriptor,
+ USB_Descriptor_Endpoint_t).Attributes & EP_TYPE_MASK);
+
+ /* Check the endpoint type, break out if correct BULK type endpoint found */
+ if (EndpointType == EP_TYPE_BULK)
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ return DESCRIPTOR_SEARCH_Fail;
+ }
+
+ return DESCRIPTOR_SEARCH_NotFound;
+}
projects / pub / USBasp.git / blobdiff