Add new USB_Host_SetInterfaceAltSetting() convenience function.

[pub/lufa.git] / LUFA / Drivers / USB / Core / AVR8 / Host_AVR8.c

diff --git a/LUFA/Drivers/USB/Core/AVR8/Host_AVR8.c b/LUFA/Drivers/USB/Core/AVR8/Host_AVR8.c
index 6c45265..d18e023 100644 (file)
--- a/LUFA/Drivers/USB/Core/AVR8/Host_AVR8.c
+++ b/LUFA/Drivers/USB/Core/AVR8/Host_AVR8.c
@@ -351,5 +351,22 @@ uint8_t USB_Host_ClearPipeStall(const uint8_t EndpointNum)
        return USB_Host_SendControlRequest(NULL);
 }
 
+uint8_t USB_Host_SetInterfaceAltSetting(const uint8_t InterfaceNum,
+                                        const uint8_t AltSetting)
+{
+       USB_ControlRequest = (USB_Request_Header_t)
+               {
+                       .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE),
+                       .bRequest      = REQ_SetInterface,
+                       .wValue        = AltSetting,
+                       .wIndex        = InterfaceNum,
+                       .wLength       = 0,
+               };
+
+       Pipe_SelectPipe(PIPE_CONTROLPIPE);
+
+       return USB_Host_SendControlRequest(NULL);
+}
+
 #endif