Add new USB_Host_SetInterfaceAltSetting() convenience function.

[pub/USBasp.git] / Demos / Host / LowLevel / PrinterHost / PrinterHost.c

diff --git a/Demos/Host/LowLevel/PrinterHost/PrinterHost.c b/Demos/Host/LowLevel/PrinterHost/PrinterHost.c
index 045ecd9..6265eee 100644 (file)
--- a/Demos/Host/LowLevel/PrinterHost/PrinterHost.c
+++ b/Demos/Host/LowLevel/PrinterHost/PrinterHost.c
@@ -177,16 +177,7 @@ void USB_Printer_Host(void)
                         * request to switch to the interface alternate setting with the Bidirectional protocol */
                        if (PrinterAltSetting)
                        {
-                               USB_ControlRequest = (USB_Request_Header_t)
-                                       {
-                                               .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE),
-                                               .bRequest      = REQ_SetInterface,
-                                               .wValue        = PrinterAltSetting,
-                                               .wIndex        = PrinterInterfaceNumber,
-                                               .wLength       = 0,
-                                       };
-
-                               if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
+                               if ((ErrorCode = USB_Host_SetInterfaceAltSetting(PrinterInterfaceNumber, PrinterAltSetting)) != HOST_SENDCONTROL_Successful)
                                {
                                        printf_P(PSTR(ESC_FG_RED "Control Error (Set Interface).\r\n"
                                                                 " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);