apps/examples/hidkbd: Remove call to arch_usbhost_initialize(). That is violation of the OS interfacing rules and will no longer be supported. USB host should be initialized as part of the normal board bring-up logic as with any other devices and should not involve illegal calls from applications into the OS.

examples/hidkbd/Kconfig

@@ -6,24 +6,11 @@
 config EXAMPLES_HIDKBD
 	bool "USB HID keyboard example"
 	default n
-	depends on !BUILD_PROTECTED && !BUILD_KERNEL
 	---help---
 		Enable the USB HID keyboard example
 
 if EXAMPLES_HIDKBD
 
-config EXAMPLES_HIDKBD_DEFPRIO
-	int "Waiter Thread Priority"
-	default 50
-	---help---
-		Priority of "waiter" thread.  Default: 50
-
-config EXAMPLES_HIDKBD_STACKSIZE
-	int "Waiter Thread Stack Size"
-	default 1024
-	---help---
-		Stacksize of "waiter" thread. Default 1024
-
 config EXAMPLES_HIDKBD_DEVNAME
 	string "Keyboard Device Name"
 	default "/dev/kbda"

examples/hidkbd/Makefile

@@ -1,7 +1,7 @@
 ############################################################################
 # apps/examples/hidkbd/Makefile
 #
-#   Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2011-2012, 2017 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -37,13 +37,20 @@
 
 # USB Host HID keyboard Example
 
+CONFIG_EXAMPLES_HIDKBD_PRIORITY ?= SCHED_PRIORITY_DEFAULT
+CONFIG_EXAMPLES_HIDKBD_STACKSIZE ?= 2048
+
 APPNAME = hidkbd
+PRIORITY = $(CONFIG_EXAMPLES_HIDKBD_PRIORITY)
+STACKSIZE = $(CONFIG_EXAMPLES_HIDKBD_STACKSIZE)
+
+# Hello, World! Example
 
 ASRCS =
 CSRCS =
 MAINSRC = hidkbd_main.c
 
-CONFIG_XYZ_PROGNAME ?= hidkbd$(EXEEXT)
+CONFIG_EXAMPLES_HIDKBD_PROGNAME ?= hidkbd$(EXEEXT)
-PROGNAME = $(CONFIG_XYZ_PROGNAME)
+PROGNAME = $(CONFIG_EXAMPLES_HIDKBD_PROGNAME)
 
 include $(APPDIR)/Application.mk

examples/hidkbd/hidkbd_main.c

@@ -1,7 +1,7 @@
 /****************************************************************************
  * examples/hidkbd/hidkbd_main.c
  *
- *   Copyright (C) 2011, 2013-2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011, 2013-2015, 2017 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,16 +39,9 @@
 
 #include <nuttx/config.h>
 
-#include <sys/types.h>
-#include <sys/stat.h>
-
 #include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <sched.h>
-#include <string.h>
-#include <ctype.h>
-#include <assert.h>
 #include <errno.h>
 
 #include <nuttx/usb/usbhost.h>
@@ -79,14 +72,6 @@
 
 /* Provide some default values for other configuration settings */
 
-#ifndef CONFIG_EXAMPLES_HIDKBD_DEFPRIO
-#  define CONFIG_EXAMPLES_HIDKBD_DEFPRIO 50
-#endif
-
-#ifndef CONFIG_EXAMPLES_HIDKBD_STACKSIZE
-#  define CONFIG_EXAMPLES_HIDKBD_STACKSIZE 1024
-#endif
-
 #ifndef CONFIG_EXAMPLES_HIDKBD_DEVNAME
 #  define CONFIG_EXAMPLES_HIDKBD_DEVNAME "/dev/kbda"
 #endif
@@ -108,22 +93,6 @@ struct hidbkd_instream_s
 };
 #endif
 
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-static FAR struct usbhost_connection_s *g_usbconn;
-
-/****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
-/* The platform-specific code must provide a wrapper called
- * arch_usbhost_initialize() that will perform the actual USB host
- * initialization.
- */
-
-FAR struct usbhost_connection_s *arch_usbhost_initialize(void);
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -223,41 +192,6 @@ static void hidkbd_decode(FAR char *buffer, ssize_t nbytes)
 }
 #endif
 
-/****************************************************************************
- * Name: hidkbd_waiter
- *
- * Description:
- *   Wait for USB devices to be connected.
- *
- ****************************************************************************/
-
-static int hidkbd_waiter(int argc, char *argv[])
-{
-  FAR struct usbhost_hubport_s *hport;
-
-  printf("hidkbd_waiter: Running\n");
-  for (;;)
-    {
-      /* Wait for the device to change state */
-
-      DEBUGVERIFY(CONN_WAIT(g_usbconn, &hport));
-      printf("hidkbd_waiter: %s\n", hport->connected ? "connected" : "disconnected");
-
-      /* Did we just become connected? */
-
-      if (hport->connected)
-        {
-          /* Yes.. enumerate the newly connected device */
-
-          (void)CONN_ENUMERATE(g_usbconn, hport);
-        }
-    }
-
-  /* Keep the compiler from complaining */
-
-  return 0;
-}
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -273,40 +207,11 @@ int hidkbd_main(int argc, char *argv[])
 #endif
 {
   char buffer[256];
-  pid_t pid;
   ssize_t nbytes;
   int fd;
-  int ret;
 
-  /* First, register all of the USB host HID keyboard class driver */
+  /* Eventually logic here will open the kbd device and perform the HID
-
+   * keyboard test.
-  printf("hidkbd_main: Register class drivers\n");
-  ret = usbhost_kbdinit();
-  if (ret != OK)
-    {
-      printf("hidkbd_main: Failed to register the KBD class\n");
-    }
-
-  /* Then get an instance of the USB host interface.  The platform-specific
-   * code must provide a wrapper called arch_usbhost_initialize() that will
-   * perform the actual USB host initialization.
-   */
-
-  printf("hidkbd_main: Initialize USB host keyboard driver\n");
-  g_usbconn = arch_usbhost_initialize();
-  if (g_usbconn)
-    {
-      /* Start a thread to handle device connection. */
-
-      printf("hidkbd_main: Start hidkbd_waiter\n");
-
-      pid = task_create("usbhost", CONFIG_EXAMPLES_HIDKBD_DEFPRIO,
-                        CONFIG_EXAMPLES_HIDKBD_STACKSIZE,
-                        (main_t)hidkbd_waiter, (FAR char * const *)NULL);
-      UNUSED(pid);
-
-      /* Now just sleep.  Eventually logic here will open the kbd device and
-       * perform the HID keyboard test.
    */
 
   for (;;)
@@ -355,7 +260,6 @@ int hidkbd_main(int argc, char *argv[])
       fflush(stdout);
       close(fd);
     }
-    }
 
   return 0;
 }