Add new USB_Host_GetDeviceStringDescriptor() convenience function.

[pub/USBasp.git] / LUFA / Drivers / USB / LowLevel / Host.h

diff --git a/LUFA/Drivers/USB/LowLevel/Host.h b/LUFA/Drivers/USB/LowLevel/Host.h
index 8cf1fe0..0a07002 100644 (file)
--- a/LUFA/Drivers/USB/LowLevel/Host.h
+++ b/LUFA/Drivers/USB/LowLevel/Host.h
@@ -201,6 +201,22 @@
                         */\r
                        uint8_t USB_Host_GetDeviceDescriptor(void* const DeviceDescriptorPtr);\r
                        \r
+                       /** Convenience function. This routine sends a GetDescriptor standard request to the attached\r
+                        *  device, requesting the string descriptor of the specified index. This can be used to easily\r
+                        *  retrieve string descriptors from the device by index, after the index is obtained from the\r
+                        *  Device or Configuration descriptors.\r
+                        *\r
+                        *  \note After this routine returns, the control pipe will be selected.\r
+                        *\r
+                        *  \param[in] Index  Index of the string index to retrieve\r
+                        *  \param[out] Buffer  Pointer to the destination buffer where the retrieved string decriptor is\r
+                        *                      to be stored\r
+                        *  \param[in] BufferLength  Maximum size of the string descriptor which can be stored into the buffer\r
+                        *\r
+                        *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.\r
+                        */\r
+                       uint8_t USB_Host_GetDeviceStringDescriptor(uint8_t Index, void* const Buffer, uint8_t BufferLength);\r
+                       \r
                        /** Clears a stall condition on the given pipe, via a ClearFeature request to the attached device.\r
                         *\r
                         *  \note After this routine returns, the control pipe will be selected.\r