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-rw-r--r--Demos/Host/LowLevel/GenericHIDHost/ConfigDescriptor.c334
1 files changed, 167 insertions, 167 deletions
diff --git a/Demos/Host/LowLevel/GenericHIDHost/ConfigDescriptor.c b/Demos/Host/LowLevel/GenericHIDHost/ConfigDescriptor.c
index ea228a60d..f5d8e5cd5 100644
--- a/Demos/Host/LowLevel/GenericHIDHost/ConfigDescriptor.c
+++ b/Demos/Host/LowLevel/GenericHIDHost/ConfigDescriptor.c
@@ -1,167 +1,167 @@
-/*
- 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 HID interface descriptor containing at least one Interrupt type IN endpoint.
- *
- * \return An error code from the \ref GenericHIDHost_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 HID interface from the configuration descriptor */
- if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
- DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found)
- {
- /* Descriptor not found, error out */
- return NoHIDInterfaceFound;
- }
-
- while (FoundEndpoints != ((1 << HID_DATA_IN_PIPE) | (1 << HID_DATA_OUT_PIPE)))
- {
- /* Get the next HID interface's data endpoint descriptor */
- if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
- DComp_NextHIDInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
- {
- /* Not all HID devices have an OUT endpoint - if we've reached the end of the HID descriptor
- * but only found the mandatory IN endpoint, it's safe to continue with the device enumeration */
- if (FoundEndpoints == (1 << HID_DATA_IN_PIPE))
- break;
-
- /* Descriptor not found, error out */
- return NoEndpointFound;
- }
-
- /* Retrieve the endpoint address from the endpoint descriptor */
- USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
-
- /* If the endpoint is a IN type endpoint */
- if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
- {
- /* Configure the HID data IN pipe */
- Pipe_ConfigurePipe(HID_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
- EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
-
- FoundEndpoints |= (1 << HID_DATA_IN_PIPE);
- }
- else
- {
- /* Configure the HID data OUT pipe */
- Pipe_ConfigurePipe(HID_DATA_OUT_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT,
- EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
-
- FoundEndpoints |= (1 << HID_DATA_OUT_PIPE);
- }
- }
-
- /* 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 HID Class value.
- *
- * \return A value from the DSEARCH_Return_ErrorCodes_t enum
- */
-uint8_t DComp_NextHIDInterface(void* CurrentDescriptor)
-{
- /* Determine if the current descriptor is an interface descriptor */
- if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
- {
- /* Check the HID descriptor class, break out if correct class/protocol interface found */
- if (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == HID_CLASS)
- {
- /* Indicate that the descriptor being searched for has been found */
- return DESCRIPTOR_SEARCH_Found;
- }
- }
-
- /* Current descriptor does not match what this comparator is looking for */
- 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 Endpoint descriptor inside the current interface descriptor,
- * 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_NextHIDInterfaceDataEndpoint(void* CurrentDescriptor)
-{
- /* Determine the type of the current descriptor */
- if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
- {
- /* Indicate that the descriptor being searched for has been found */
- return DESCRIPTOR_SEARCH_Found;
- }
- else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
- {
- /* Indicate that the search has failed prematurely and should be aborted */
- return DESCRIPTOR_SEARCH_Fail;
- }
-
- /* Current descriptor does not match what this comparator is looking for */
- return DESCRIPTOR_SEARCH_NotFound;
-}
+/*
+ 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 HID interface descriptor containing at least one Interrupt type IN endpoint.
+ *
+ * \return An error code from the \ref GenericHIDHost_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 HID interface from the configuration descriptor */
+ if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+ DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ /* Descriptor not found, error out */
+ return NoHIDInterfaceFound;
+ }
+
+ while (FoundEndpoints != ((1 << HID_DATA_IN_PIPE) | (1 << HID_DATA_OUT_PIPE)))
+ {
+ /* Get the next HID interface's data endpoint descriptor */
+ if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+ DComp_NextHIDInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ /* Not all HID devices have an OUT endpoint - if we've reached the end of the HID descriptor
+ * but only found the mandatory IN endpoint, it's safe to continue with the device enumeration */
+ if (FoundEndpoints == (1 << HID_DATA_IN_PIPE))
+ break;
+
+ /* Descriptor not found, error out */
+ return NoEndpointFound;
+ }
+
+ /* Retrieve the endpoint address from the endpoint descriptor */
+ USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
+
+ /* If the endpoint is a IN type endpoint */
+ if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+ {
+ /* Configure the HID data IN pipe */
+ Pipe_ConfigurePipe(HID_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ FoundEndpoints |= (1 << HID_DATA_IN_PIPE);
+ }
+ else
+ {
+ /* Configure the HID data OUT pipe */
+ Pipe_ConfigurePipe(HID_DATA_OUT_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ FoundEndpoints |= (1 << HID_DATA_OUT_PIPE);
+ }
+ }
+
+ /* 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 HID Class value.
+ *
+ * \return A value from the DSEARCH_Return_ErrorCodes_t enum
+ */
+uint8_t DComp_NextHIDInterface(void* CurrentDescriptor)
+{
+ /* Determine if the current descriptor is an interface descriptor */
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ /* Check the HID descriptor class, break out if correct class/protocol interface found */
+ if (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == HID_CLASS)
+ {
+ /* Indicate that the descriptor being searched for has been found */
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ }
+
+ /* Current descriptor does not match what this comparator is looking for */
+ 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 Endpoint descriptor inside the current interface descriptor,
+ * 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_NextHIDInterfaceDataEndpoint(void* CurrentDescriptor)
+{
+ /* Determine the type of the current descriptor */
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
+ {
+ /* Indicate that the descriptor being searched for has been found */
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ /* Indicate that the search has failed prematurely and should be aborted */
+ return DESCRIPTOR_SEARCH_Fail;
+ }
+
+ /* Current descriptor does not match what this comparator is looking for */
+ return DESCRIPTOR_SEARCH_NotFound;
+}