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Add new USB_Host_GetDescriptor() function. Alter the USB_Host_GetDeviceDescriptor() and USB_Host_GetDeviceStringDescriptor() convenience functions so that they wrap the new function.

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This commit is contained in:
Dean Camera 2011-11-24 11:46:04 +00:00
parent e915d968a5
commit 3b99abb5fc
3 changed files with 63 additions and 51 deletions
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87
LUFA/Drivers/USB/Core/HostStandardReq.h
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@ -80,12 +80,12 @@
{
HOST_SENDCONTROL_Successful = 0, /**< No error occurred in the request transfer. */
HOST_SENDCONTROL_DeviceDisconnected = 1, /**< The attached device was disconnected during the
* request transfer.
* request transfer.
*/
HOST_SENDCONTROL_PipeError = 2, /**< An error occurred in the pipe while sending the request. */
HOST_SENDCONTROL_SetupStalled = 3, /**< The attached device stalled the request, usually
* indicating that the request is unsupported on the device.
*/
* indicating that the request is unsupported on the device.
*/
HOST_SENDCONTROL_SoftwareTimeOut = 4, /**< The request or data transfer timed out. */
};
@ -144,39 +144,24 @@
*/
uint8_t USB_Host_GetDeviceConfiguration(uint8_t* const ConfigNumber) ATTR_NON_NULL_PTR_ARG(1);
/** Sends a GET DESCRIPTOR standard request to the attached device, requesting the device descriptor.
* This can be used to easily retrieve information about the device such as its VID, PID and power
* requirements.
/** Sends a GET DESCRIPTOR standard request to the attached device, requesting the descriptor of the
* specified type and index.
*
* \note After this routine returns, the control pipe will be selected.
*
* \ingroup Group_PipeControlReq
*
* \param[out] DeviceDescriptorPtr Pointer to the destination device descriptor structure where
* the read data is to be stored.
* \param[in] Type Type of descriptor to retrieve, a value from the \ref USB_DescriptorTypes_t enum.
* \param[in] Index Index of the descriptor to retrieve.
* \param[out] Buffer Pointer to the destination buffer where the retrieved string descriptor is to be stored.
* \param[in] BufferLength Maximum size of the string descriptor which can be stored into the buffer.
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
*/
uint8_t USB_Host_GetDeviceDescriptor(void* const DeviceDescriptorPtr) ATTR_NON_NULL_PTR_ARG(1);
/** Sends a GET DESCRIPTOR standard request to the attached device, requesting the string descriptor
* of the specified index. This can be used to easily retrieve string descriptors from the device by
* index, after the index is obtained from the Device or Configuration descriptors.
*
* \note After this routine returns, the control pipe will be selected.
*
* \ingroup Group_PipeControlReq
*
* \param[in] Index Index of the string index to retrieve.
* \param[out] Buffer Pointer to the destination buffer where the retrieved string descriptor is
* to be stored.
* \param[in] BufferLength Maximum size of the string descriptor which can be stored into the buffer.
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
*/
uint8_t USB_Host_GetDeviceStringDescriptor(const uint8_t Index,
void* const Buffer,
const uint8_t BufferLength) ATTR_NON_NULL_PTR_ARG(2);
uint8_t USB_Host_GetDescriptor(const uint8_t Type,
const uint8_t Index,
void* const Buffer,
const uint8_t BufferLength) ATTR_NON_NULL_PTR_ARG(3);
/** Retrieves the current feature status of the attached device, via a GET STATUS standard request. The
* retrieved feature status can then be examined by masking the retrieved value with the various
@ -217,7 +202,7 @@
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
*/
uint8_t USB_Host_SetInterfaceAltSetting(const uint8_t InterfaceIndex,
const uint8_t AltSetting);
const uint8_t AltSetting);
/** Retrieves the current alternative setting for the specified interface, via a GET INTERFACE standard request to
@ -234,7 +219,49 @@
*/
uint8_t USB_Host_GetInterfaceAltSetting(const uint8_t InterfaceIndex,
uint8_t* const AltSetting) ATTR_NON_NULL_PTR_ARG(2);
/* Inline Functions: */
/** Sends a GET DESCRIPTOR standard request to the attached device, requesting the device descriptor.
* This can be used to easily retrieve information about the device such as its VID, PID and power
* requirements. This is a convenience wrapper for \ref USB_Host_GetDescriptor().
*
* \note After this routine returns, the control pipe will be selected.
*
* \ingroup Group_PipeControlReq
*
* \param[out] DeviceDescriptorPtr Pointer to the destination device descriptor structure where
* the read data is to be stored.
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
*/
static inline uint8_t USB_Host_GetDeviceDescriptor(USB_Descriptor_Device_t* const DeviceDescriptorPtr)
{
return USB_Host_GetDescriptor(DTYPE_Device, 0, DeviceDescriptorPtr, sizeof(USB_Descriptor_Device_t));
}
/** Sends a GET DESCRIPTOR standard request to the attached device, requesting the string descriptor
* of the specified index. This can be used to easily retrieve string descriptors from the device by
* index, after the index is obtained from the Device or Configuration descriptors. This is a convenience
* wrapper for \ref USB_Host_GetDescriptor().
*
* \note After this routine returns, the control pipe will be selected.
*
* \ingroup Group_PipeControlReq
*
* \param[in] Index Index of the string descriptor to retrieve.
* \param[out] Buffer Pointer to the destination buffer where the retrieved string descriptor is
* to be stored.
* \param[in] BufferLength Maximum size of the string descriptor which can be stored into the buffer.
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
*/
static inline uint8_t USB_Host_GetDeviceStringDescriptor(const uint8_t Index,
void* const Buffer,
const uint8_t BufferLength)
{
return USB_Host_GetDescriptor(DTYPE_String, Index, Buffer, BufferLength);
}
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Enums: */