Add FreeRTOS-Plus directory.

FreeRTOS/Demo/Common/drivers/Atmel/at91lib/utility/trace.h

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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
+ * ----------------------------------------------------------------------------
+ */
+
+/*
+    Title: Trace
+
+    About: Purpose
+        Standard output methods for reporting debug information, warnings and
+        errors, which can be turned on/off.
+
+    About: Usage
+        1 - Initialize the DBGU using <trace_CONFIGURE>.
+        2 - Uses the <trace_LOG> macro to output traces throughout the program.
+        3 - Turn off all traces by defining the NOTRACE symbol during
+            compilation.
+        4 - Disable a group of trace by changing the value of <trace_LEVEL>
+            during compilation; traces with a level below <trace_LEVEL> are not
+            generated.
+*/
+
+#ifndef TRACE_H
+#define TRACE_H
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+
+#if !defined(NOTRACE)
+    #include <board.h>
+    #include <dbgu/dbgu.h>
+    #include <pio/pio.h>
+    #include <stdio.h>
+#endif
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+/*
+    Constants: Trace levels
+        trace_FATAL - Indicates a major error which prevents the program from
+            going any further.
+        trace_ERROR - Indicates an error which may not stop the program
+            execution, but which indicates there is a problem with the code.
+        trace_WARNING - Indicates that a minor error has happened. In most case
+            it can be discarded safely; it may even be expected.
+        trace_INFO - Informational trace about the program execution. Should
+            enable the user to see the execution flow.
+        trace_DEBUG - Traces whose only purpose is for debugging the program,
+            and which do not produce meaningful information otherwise.
+*/
+#define trace_DEBUG                     0
+#define trace_INFO                      1
+#define trace_WARNING                   2
+#define trace_ERROR                     3
+#define trace_FATAL                     4
+
+/*
+    Constant: trace_LEVEL
+        Minimum level of traces that are output. By default, all traces are
+        output; change the value of this symbol during compilation for a more
+        restrictive behavior.
+*/
+#if !defined(trace_LEVEL)
+    #define trace_LEVEL                     0
+#endif
+
+/*
+    Macro: trace_CONFIGURE
+        Initializes the DBGU unless the NOTRACE symbol has been defined.
+
+    Parameters:
+        mode - DBGU mode.
+        baudrate - DBGU baudrate.
+        mck - Master clock frequency.
+*/
+#if !defined(NOTRACE)
+    #define trace_CONFIGURE(mode, baudrate, mck) { \
+        const Pin pinsDbgu[] = {PINS_DBGU}; \
+        PIO_Configure(pinsDbgu, PIO_LISTSIZE(pinsDbgu)); \
+        DBGU_Configure(mode, baudrate, mck); \
+    }
+#else
+    #define trace_CONFIGURE(...)
+#endif
+
+/*
+    Macro: trace_LOG
+        Outputs a formatted string using <printf> if the log level is high
+        enough. Can be disabled by defining the NOTRACE symbol during
+        compilation.
+
+    Parameters:
+        level - Trace level (see <Trace levels>).
+        format - Formatted string to output.
+        ... - Additional parameters, depending on the formatted string.
+*/
+#if !defined(NOTRACE)
+    #define trace_LOG(level, ...) { \
+        if (level >= trace_LEVEL) { \
+            printf(__VA_ARGS__); \
+        } \
+    }
+#else
+    #define trace_LOG(...)
+#endif
+
+#endif //#ifndef TRACE_H
+