Extend USB trace logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2212 42af7a65-404d-4744-a932-0658087f49c3

5 files changed, 360 insertions, 177 deletions

diff --git a/nuttx/drivers/usbdev/Make.defs b/nuttx/drivers/usbdev/Make.defs
index c4b359e43..e4b343a73 100644
--- a/nuttx/drivers/usbdev/Make.defs
+++ b/nuttx/drivers/usbdev/Make.defs
@@ -43,6 +43,6 @@ endif
 ifeq ($(CONFIG_USBSTRG),y)
 USBDEV_CSRCS  += usbdev_storage.c usbdev_scsi.c
 endif
-USBDEV_CSRCS  += usbdev_trace.c usbdev_trprint.c
+USBDEV_CSRCS  += usbdev_trace.c usbdev_trprintf.c
 endif
 
diff --git a/nuttx/drivers/usbdev/usbdev_trace.c b/nuttx/drivers/usbdev/usbdev_trace.c
index d8cfe324b..10779aa70 100644
--- a/nuttx/drivers/usbdev/usbdev_trace.c
+++ b/nuttx/drivers/usbdev/usbdev_trace.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * drivers/usbdev/usbdev_trace.c
  *
- *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,6 +57,10 @@
 #  define CONFIG_USBDEV_TRACE_NRECORDS 128
 #endif
 
+#ifndef CONFIG_USBDEV_TRACE_INITIALIDSET
+#  define CONFIG_USBDEV_TRACE_INITIALIDSET 0
+#endif
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -76,7 +80,7 @@ static uint16 g_tail = 0;
 #endif
 
 #if defined(CONFIG_USBDEV_TRACE) || (defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_USB))
-static usbtrace_idset_t g_maskedidset = 0;
+static usbtrace_idset_t g_maskedidset = CONFIG_USBDEV_TRACE_INITIALIDSET;
 #endif
 
 /****************************************************************************
@@ -163,178 +167,10 @@ void usbtrace(uint16 event, uint16 value)
             }
         }
 #else
-      switch (event)
-        {
-        case TRACE_DEVINIT:
-          lldbg("USB controller initialization: %04x\n", value);
-          break;
-
-        case TRACE_DEVUNINIT:
-          lldbg("USB controller un-initialization: %04x\n", value);
-          break;
-
-        case TRACE_DEVREGISTER:
-          lldbg("usbdev_register(): %04x\n", value);
-          break;
-
-        case TRACE_DEVUNREGISTER:
-          lldbg("usbdev_unregister(): %04x\n", value);
-          break;
-
-        case TRACE_EPCONFIGURE:
-          lldbg("Endpoint configure(): %04x\n", value);
-          break;
-
-        case TRACE_EPDISABLE:
-          lldbg("Endpoint disable(): %04x\n", value);
-          break;
-
-        case TRACE_EPALLOCREQ:
-          lldbg("Endpoint allocreq(): %04x\n", value);
-          break;
-
-        case TRACE_EPFREEREQ:
-          lldbg("Endpoint freereq(): %04x\n", value);
-          break;
-
-        case TRACE_EPALLOCBUFFER:
-          lldbg("Endpoint allocbuffer(): %04x\n", value);
-          break;
-
-        case TRACE_EPFREEBUFFER:
-          lldbg("Endpoint freebuffer(): %04x\n", value);
-          break;
-
-        case TRACE_EPSUBMIT:
-          lldbg("Endpoint submit(): %04x\n", value);
-          break;
-
-        case TRACE_EPCANCEL:
-          lldbg("Endpoint cancel(): %04x\n", value);
-          break;
-
-        case TRACE_EPSTALL:
-          lldbg("Endpoint stall(TRUE): %04x\n", value);
-          break;
-
-        case TRACE_EPRESUME:
-          lldbg("Endpoint stall(FALSE): %04x\n", value);
-          break;
-
-        case TRACE_DEVALLOCEP:
-          lldbg("Device allocep(): %04x\n", value);
-          break;
+      /* Just print the data using lib_lowprintf */
 
-        case TRACE_DEVFREEEP:
-          lldbg("Device freeep(): %04x\n", value);
-          break;
-
-        case TRACE_DEVGETFRAME:
-          lldbg("Device getframe(): %04x\n", value);
-          break;
-
-        case TRACE_DEVWAKEUP:
-          lldbg("Device wakeup(): %04x\n", value);
-          break;
-
-        case TRACE_DEVSELFPOWERED:
-          lldbg("Device selfpowered(): %04x\n", value);
-          break;
-
-        case TRACE_DEVPULLUP:
-          lldbg("Device pullup(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSBIND:
-          lldbg("Class bind(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSUNBIND:
-          lldbg("Class unbind(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSDISCONNECT:
-          lldbg("Class disconnect(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSSETUP:
-          lldbg("Class setup(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSSUSPEND:
-          lldbg("Class suspend(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSRESUME:
-          lldbg("Class resume(): %04x\n", value);
-          break;
-
-        case TRACE_CLASSRDCOMPLETE:
-          lldbg("Class RD request complete: %04x\n", value);
-          break;
-
-        case TRACE_CLASSWRCOMPLETE:
-          lldbg("Class WR request complete: %04x\n", value);
-          break;
-
-        default:
-          switch (TRACE_ID(event))
-            {
-            case TRACE_CLASSAPI_ID:        /* Other class driver system API calls */
-              lldbg("Class API call %d: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_CLASSSTATE_ID:      /* Track class driver state changes */
-              lldbg("Class state %d: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_INTENTRY_ID:        /* Interrupt handler entry */
-              lldbg("Interrupt %d entry: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_INTDECODE_ID:       /* Decoded interrupt event */
-              lldbg("Interrrupt decode %d: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_INTEXIT_ID:         /* Interrupt handler exit */
-              lldbg("Interrrupt %d exit: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_OUTREQQUEUED_ID:    /* Request queued for OUT endpoint */
-              lldbg("EP%d OUT request queued: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_INREQQUEUED_ID:     /* Request queued for IN endpoint */
-              lldbg("EP%d IN request queued: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_READ_ID:            /* Read (OUT) action */
-              lldbg("EP%d OUT read: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_WRITE_ID:           /* Write (IN) action */
-              lldbg("EP%d IN write: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_COMPLETE_ID:        /* Request completed */
-              lldbg("EP%d request complete: %04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_DEVERROR_ID:        /* USB controller driver error event */
-              lldbg("Controller error: %02x:%04x\n", TRACE_DATA(event), value);
-              break;
-
-            case TRACE_CLSERROR_ID:        /* USB class driver error event */
-              lldbg("Class error: %02x:%04x\n", TRACE_DATA(event), value);
-              break;
-
-            default:
-              lldbg("Unrecognized event: %02x:%02x:%04x\n",
-                    TRACE_ID(event) >> 8, TRACE_DATA(event), value);
-              break;
-            }
-        }
-#endif /* CONFIG_USBDEV_TRACE */
+      usbtrace_trprintf((trprintf_t)lib_lowprintf, event, value);
+#endif
     }
   irqrestore(flags);
 }
diff --git a/nuttx/drivers/usbdev/usbdev_trprintf.c b/nuttx/drivers/usbdev/usbdev_trprintf.c
new file mode 100755
index 000000000..8dd61dadf
--- /dev/null
+++ b/nuttx/drivers/usbdev/usbdev_trprintf.c
@@ -0,0 +1,252 @@
+/****************************************************************************
+ * drivers/usbdev/usbdev_trprintf.c
+ *
+ *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <debug.h>
+
+#include <nuttx/usbdev_trace.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*******************************************************************************
+ * Name: usbtrace_trprintf
+ *
+ * Description:
+ *   Print the trace record using the supplied printing function
+ *
+ *******************************************************************************/
+
+void usbtrace_trprintf(trprintf_t trprintf, uint16 event, uint16 value)
+{
+  switch (event)
+    {
+    case TRACE_DEVINIT:
+      trprintf("USB controller initialization: %04x\n", value);
+      break;
+
+    case TRACE_DEVUNINIT:
+      trprintf("USB controller un-initialization: %04x\n", value);
+      break;
+
+    case TRACE_DEVREGISTER:
+      trprintf("usbdev_register(): %04x\n", value);
+      break;
+
+    case TRACE_DEVUNREGISTER:
+      trprintf("usbdev_unregister(): %04x\n", value);
+      break;
+
+    case TRACE_EPCONFIGURE:
+      trprintf("Endpoint configure(): %04x\n", value);
+      break;
+
+    case TRACE_EPDISABLE:
+      trprintf("Endpoint disable(): %04x\n", value);
+      break;
+
+    case TRACE_EPALLOCREQ:
+      trprintf("Endpoint allocreq(): %04x\n", value);
+      break;
+
+    case TRACE_EPFREEREQ:
+      trprintf("Endpoint freereq(): %04x\n", value);
+      break;
+
+    case TRACE_EPALLOCBUFFER:
+      trprintf("Endpoint allocbuffer(): %04x\n", value);
+      break;
+
+    case TRACE_EPFREEBUFFER:
+      trprintf("Endpoint freebuffer(): %04x\n", value);
+      break;
+
+    case TRACE_EPSUBMIT:
+      trprintf("Endpoint submit(): %04x\n", value);
+      break;
+
+    case TRACE_EPCANCEL:
+      trprintf("Endpoint cancel(): %04x\n", value);
+      break;
+
+    case TRACE_EPSTALL:
+      trprintf("Endpoint stall(TRUE): %04x\n", value);
+      break;
+
+    case TRACE_EPRESUME:
+      trprintf("Endpoint stall(FALSE): %04x\n", value);
+      break;
+
+    case TRACE_DEVALLOCEP:
+      trprintf("Device allocep(): %04x\n", value);
+      break;
+
+    case TRACE_DEVFREEEP:
+      trprintf("Device freeep(): %04x\n", value);
+      break;
+
+    case TRACE_DEVGETFRAME:
+      trprintf("Device getframe(): %04x\n", value);
+      break;
+
+    case TRACE_DEVWAKEUP:
+      trprintf("Device wakeup(): %04x\n", value);
+      break;
+
+    case TRACE_DEVSELFPOWERED:
+      trprintf("Device selfpowered(): %04x\n", value);
+      break;
+
+    case TRACE_DEVPULLUP:
+      trprintf("Device pullup(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSBIND:
+      trprintf("Class bind(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSUNBIND:
+      trprintf("Class unbind(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSDISCONNECT:
+      trprintf("Class disconnect(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSSETUP:
+      trprintf("Class setup(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSSUSPEND:
+      trprintf("Class suspend(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSRESUME:
+      trprintf("Class resume(): %04x\n", value);
+      break;
+
+    case TRACE_CLASSRDCOMPLETE:
+      trprintf("Class RD request complete: %04x\n", value);
+      break;
+
+    case TRACE_CLASSWRCOMPLETE:
+      trprintf("Class WR request complete: %04x\n", value);
+      break;
+
+    default:
+      switch (TRACE_ID(event))
+        {
+        case TRACE_CLASSAPI_ID:        /* Other class driver system API calls */
+          trprintf("Class API call %d: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_CLASSSTATE_ID:      /* Track class driver state changes */
+          trprintf("Class state %d: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_INTENTRY_ID:        /* Interrupt handler entry */
+          trprintf("Interrupt %d entry: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_INTDECODE_ID:       /* Decoded interrupt event */
+          trprintf("Interrupt decode %d: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_INTEXIT_ID:         /* Interrupt handler exit */
+          trprintf("Interrupt %d exit: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_OUTREQQUEUED_ID:    /* Request queued for OUT endpoint */
+          trprintf("EP%d OUT request queued: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_INREQQUEUED_ID:     /* Request queued for IN endpoint */
+          trprintf("EP%d IN request queued: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_READ_ID:            /* Read (OUT) action */
+          trprintf("EP%d OUT read: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_WRITE_ID:           /* Write (IN) action */
+          trprintf("EP%d IN write: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_COMPLETE_ID:        /* Request completed */
+          trprintf("EP%d request complete: %04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_DEVERROR_ID:        /* USB controller driver error event */
+          trprintf("Controller error: %02x:%04x\n", TRACE_DATA(event), value);
+          break;
+
+        case TRACE_CLSERROR_ID:        /* USB class driver error event */
+          trprintf("Class error: %02x:%04x\n", TRACE_DATA(event), value);
+          break;
+
+        default:
+          trprintf("Unrecognized event: %02x:%02x:%04x\n",
+                TRACE_ID(event) >> 8, TRACE_DATA(event), value);
+          break;
+        }
+    }
+}
diff --git a/nuttx/examples/usbserial/main.c b/nuttx/examples/usbserial/main.c
index a29cd5f11..192212a3a 100644
--- a/nuttx/examples/usbserial/main.c
+++ b/nuttx/examples/usbserial/main.c
@@ -49,6 +49,7 @@
 #include <debug.h>
 
 #include <nuttx/usbdev.h>
+#include <nuttx/usbdev_trace.h>
 
 /****************************************************************************
  * Definitions
@@ -66,18 +67,57 @@
 #    define COUNTER_NEEDED 1
 #  endif
 #endif
+#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACEINIT
+#  define TRACE_INIT_BITS       (TRACE_INIT_BIT)
+#else
+#  define TRACE_INIT_BITS       (0)
+#endif
+
+#define TRACE_ERROR_BITS        (TRACE_DEVERROR_BIT|TRACE_CLSERROR_BIT)
+
+#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACECLASS
+#  define TRACE_CLASS_BITS      (TRACE_CLASS_BIT|TRACE_CLASSAPI_BIT|TRACE_CLASSSTATE_BIT)
+#else
+#  define TRACE_CLASS_BITS      (0)
+#endif
+
+#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACETRANSFERS
+#  define TRACE_TRANSFER_BITS   (TRACE_OUTREQQUEUED_BIT|TRACE_INREQQUEUED_BIT|TRACE_READ_BIT|\
+                                 TRACE_WRITE_BIT|TRACE_COMPLETE_BIT)
+#else
+#  define TRACE_TRANSFER_BITS   (0)
+#endif
+
+#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACECONTROLLER
+#  define TRACE_CONTROLLER_BITS (TRACE_EP_BIT|TRACE_DEV_BIT)
+#else
+#  define TRACE_CONTROLLER_BITS (0)
+#endif
+
+#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACEINTERRUPTS
+#  define TRACE_INTERRUPT_BITS  (TRACE_INTENTRY_BIT|TRACE_INTDECODE_BIT|TRACE_INTEXIT_BIT)
+#else
+#  define TRACE_INTERRUPT_BITS  (0)
+#endif
+
+#define TRACE_BITSET            (TRACE_INIT_BITS|TRACE_ERROR_BITS|TRACE_CLASS_BITS|\
+                                 TRACE_TRANSFER_BITS|TRACE_CONTROLLER_BITS|TRACE_INTERRUPT_BITS)
 
 #ifdef CONFIG_CPP_HAVE_VARARGS
 #  ifdef CONFIG_DEBUG
 #    define message(...) lib_lowprintf(__VA_ARGS__)
+#    define trmessage    lib_lowprintf
 #  else
 #    define message(...) printf(__VA_ARGS__)
+#    define trmessage    printf
 #  endif
 #else
 #  ifdef CONFIG_DEBUG
-#    define message lib_lowprintf
+#    define message      lib_lowprintf
+#    define trmessage    lib_lowprintf
 #  else
-#    define message printf
+#    define message      printf
+#    define trmessage    printf
 #  endif
 #endif
 
@@ -125,6 +165,25 @@ static char g_iobuffer[IOBUFFER_SIZE];
 #endif
 
 /****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_USBDEV_TRACE
+static int trace_callback(struct usbtrace_s *trace, void *arg)
+{
+  usbtrace_trprintf((trprintf_t)trmessage, trace->event, trace->value);
+  return 0;
+}
+
+static void dumptrace(void)
+{
+  (void)usbtrace_enumerate(trace_callback, NULL);
+}
+#else
+#  define dumptrace()
+#endif
+
+/****************************************************************************
  * Public Functions
  ****************************************************************************/
 
@@ -173,6 +232,17 @@ int user_start(int argc, char *argv[])
     }
   message("user_start: Successfully registered the serial driver\n");
 
+#ifdef CONFIG_USBDEV_TRACE
+#if CONFIG_USBDEV_TRACE_INITIALIDSET != 0
+  /* If USB tracing is enabled, then dump all collected trace data to stdout */
+
+  sleep(5);
+  dumptrace();
+#else
+  usbtrace_enable(TRACE_BITSET);
+#endif
+#endif
+
   /* Open the USB serial device for writing (blocking) */
 
 #ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY
@@ -200,6 +270,10 @@ int user_start(int argc, char *argv[])
               return 2;
             }
         }
+
+      /* If USB tracing is enabled, then dump all collected trace data to stdout */
+
+      dumptrace();
     }
   while (outfd < 0);
 #endif
@@ -239,6 +313,10 @@ int user_start(int argc, char *argv[])
               return 3;
             }
         }
+
+      /* If USB tracing is enabled, then dump all collected trace data to stdout */
+
+      dumptrace();
     }
   while (infd < 0);
 #endif
@@ -250,7 +328,6 @@ int user_start(int argc, char *argv[])
 
   for (;;)
     {
-
      /* Test IN (device-to-host) messages */
 
 #ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY
@@ -368,6 +445,10 @@ int user_start(int argc, char *argv[])
       message("user_start: Waiting\n");
       sleep(5);
 #endif /* CONFIG_EXAMPLES_USBSERIAL_INONLY */
+
+      /* If USB tracing is enabled, then dump all collected trace data to stdout */
+
+      dumptrace();
     }
 
   /* Won't get here, but if we did this what we would have to do */
diff --git a/nuttx/include/nuttx/usbdev_trace.h b/nuttx/include/nuttx/usbdev_trace.h
index f79bc5475..7beb08d34 100644
--- a/nuttx/include/nuttx/usbdev_trace.h
+++ b/nuttx/include/nuttx/usbdev_trace.h
@@ -385,6 +385,10 @@ typedef int (*trace_callback_t)(struct usbtrace_s *trace, void *arg);
 
 typedef uint16 usbtrace_idset_t;
 
+/* Print routine to use for usbdev_trprint() output */
+
+typedef int (*trprintf_t)(const char *fmt, ...);
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/
@@ -455,6 +459,16 @@ EXTERN int usbtrace_enumerate(trace_callback_t callback, void *arg);
 #  define usbtrace_enumerate(event)
 #endif
 
+/*******************************************************************************
+ * Name: usbtrace_trprint
+ *
+ * Description:
+ *   Print the trace record using the supplied printing function
+ *
+ *******************************************************************************/
+
+EXTERN void usbtrace_trprintf(trprintf_t trprintf, uint16 event, uint16 value);
+
 #undef EXTERN
 #if defined(__cplusplus)
 }