diff options
Diffstat (limited to 'Demos/Host/Incomplete/PrinterHost/ConfigDescriptor.c')
| -rw-r--r-- | Demos/Host/Incomplete/PrinterHost/ConfigDescriptor.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/Demos/Host/Incomplete/PrinterHost/ConfigDescriptor.c b/Demos/Host/Incomplete/PrinterHost/ConfigDescriptor.c new file mode 100644 index 000000000..ed4bdb994 --- /dev/null +++ b/Demos/Host/Incomplete/PrinterHost/ConfigDescriptor.c @@ -0,0 +1,162 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, 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.
+*/
+
+#include "ConfigDescriptor.h"
+
+uint8_t ProcessConfigurationDescriptor(void)
+{
+ uint8_t* ConfigDescriptorData;
+ uint16_t ConfigDescriptorSize;
+ uint8_t ErrorCode;
+ uint8_t FoundEndpoints = 0;
+ uint8_t FoundEndpointMask;
+
+ /* Get Configuration Descriptor size from the device */
+ if (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful)
+ return ControlError;
+
+ /* Ensure that the Configuration Descriptor isn't too large */
+ if (ConfigDescriptorSize > MAX_CONFIG_DESCRIPTOR_SIZE)
+ return DescriptorTooLarge;
+
+ /* Allocate enough memory for the entire config descriptor */
+ ConfigDescriptorData = alloca(ConfigDescriptorSize);
+
+ /* Retrieve the entire configuration descriptor into the allocated buffer */
+ USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData);
+
+ /* Validate returned data - ensure first entry is a configuration header descriptor */
+ if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
+ return InvalidConfigDataReturned;
+
+ /* Get the printer interface from the configuration descriptor */
+ if ((ErrorCode = USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ NextPrinterInterface)))
+ {
+ /* Descriptor not found, error out */
+ return NoInterfaceFound;
+ }
+
+ /* Get the printer's communication protocol */
+ PrinterProtocol = DESCRIPTOR_CAST(ConfigDescriptorData, USB_Descriptor_Interface_t).Protocol;
+
+ /* Determine what endpoints to look for from the protocol */
+ switch (PrinterProtocol)
+ {
+ case PROTOCOL_UNIDIRECTIONAL:
+ FoundEndpointMask = (1 << PRINTER_DATA_OUT_PIPE);
+ break;
+ case PROTOCOL_BIDIRECTIONAL:
+ case PROTOCOL_IEEE1284:
+ FoundEndpointMask = ((1 << PRINTER_DATA_OUT_PIPE) | (1 << PRINTER_DATA_IN_PIPE));
+ break;
+ default:
+ return NoInterfaceFound;
+ }
+
+ /* Get the IN and OUT data endpoints for the mass storage interface */
+ while (FoundEndpoints != FoundEndpointMask)
+ {
+ /* Fetch the next bulk endpoint from the current printer interface */
+ if ((ErrorCode = USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ NextInterfaceBulkDataEndpoint)))
+ {
+ /* Descriptor not found, error out */
+ return NoEndpointFound;
+ }
+
+ USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
+
+ /* Check if the endpoint is a bulk IN or bulk OUT endpoint, set appropriate globals */
+ if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+ {
+ /* Configure the data IN pipe */
+ Pipe_ConfigurePipe(PRINTER_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize,
+ PIPE_BANK_SINGLE);
+
+ Pipe_SetInfiniteINRequests();
+
+ /* Set the flag indicating that the data IN pipe has been found */
+ FoundEndpoints |= (1 << PRINTER_DATA_IN_PIPE);
+ }
+ else
+ {
+ /* Configure the data OUT pipe */
+ Pipe_ConfigurePipe(PRINTER_DATA_OUT_PIPE, 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 << PRINTER_DATA_OUT_PIPE);
+ }
+ }
+
+ /* Valid data found, return success */
+ return SuccessfulConfigRead;
+}
+
+uint8_t NextPrinterInterface(void* CurrentDescriptor)
+{
+ /* PURPOSE: Find next mass storage class interface descriptor */
+
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ /* Check the descriptor class and protocol, break out if correct class/protocol interface found */
+ if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == PRINTER_CLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == PRINTER_SUBCLASS))
+ {
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ }
+
+ return DESCRIPTOR_SEARCH_NotFound;
+}
+
+uint8_t NextInterfaceBulkDataEndpoint(void* CurrentDescriptor)
+{
+ /* PURPOSE: Find next interface bulk endpoint descriptor before next interface descriptor */
+
+ 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;
+}
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