Added debug printf macros

os/various/dbgtrace.h

@@ -0,0 +1,41 @@
+#ifndef DBGTRACE_H_
+#define DBGTRACE_H_
+
+#include "chprintf.h"
+
+#if !defined(DEBUG_TRACE_PRINT)
+#define DEBUG_TRACE_PRINT     FALSE
+#endif
+
+#if !defined(DEBUG_TRACE_WARNING)
+#define DEBUG_TRACE_WARNING   FALSE
+#endif
+
+#if !defined(DEBUG_TRACE_ERROR)
+#define DEBUG_TRACE_ERROR     FALSE
+#endif
+
+/* user must provide correctly initialized pointer to print channel */
+#if DEBUG_TRACE_PRINT || DEBUG_TRACE_WARNING || DEBUG_TRACE_ERROR
+extern BaseSequentialStream   *GlobalDebugChannel;
+#endif
+
+#if DEBUG_TRACE_PRINT
+#define dbgprintf(fmt, ...)  chprintf(GlobalDebugChannel, fmt, ##__VA_ARGS__)
+#else
+#define dbgprintf(fmt, ...)  do {} while(0)
+#endif
+
+#if DEBUG_TRACE_WARNING
+#define warnprintf(fmt, ...)  chprintf(GlobalDebugChannel, fmt, ##__VA_ARGS__)
+#else
+#define warnprintf(fmt, ...)  do {} while(0)
+#endif
+
+#if DEBUG_TRACE_ERROR
+#define errprintf(fmt, ...)  chprintf(GlobalDebugChannel, fmt, ##__VA_ARGS__)
+#else
+#define errprintf(fmt, ...)  do {} while(0)
+#endif
+
+#endif /* DBGTRACE_H_ */