Demonstrate reading per-module and global log levels in example.

Also correct problem reading global log level from the module logger class interface.

Author: phillipjohnston

examples/TeensyRobustModuleLogger/TeensyRobustModuleLogger.ino

@@ -76,6 +76,9 @@ void setup()
   Log.level(module::LOOP, log_level_e::info);
   Log.echo(true); // log calls will also be printed over Serial
 
+  printf("Configured log levels are:\nSystem: %d, SETUP: %d, LOOP: %d\n",
+    Log.level(), Log.level(module::SETUP), Log.level(module::LOOP));
+
   // For demonstration purposes, we'll turn off auto-flush behavior
   // This will trigger overflow conditions in the loop() due to our flush
   // iteration count - we wait too long between flushes.

src/TeensyRobustModuleLogger.h

@@ -164,6 +164,13 @@ class TeensyRobustModuleLogger final : public LoggerBase
 		return LoggerBase::level(l);
 	}
 
+	/// Get the log level for ALL modules
+	/// We need to forward this version to the base class version
+	log_level_e level() const noexcept
+	{
+		return LoggerBase::level();
+	}
+
 	/** Set the maximum log level (filtering) for the specified module
 	 *
 	 * @param module_id The ID for the corresponding module

src/TeensySDRotationalModuleLogger.h

@@ -115,6 +115,22 @@ class TeensySDRotationalModuleLogger final : public LoggerBase
 		return module_levels_[module_id];
 	}
 
+	/// Set the log level for ALL modules
+	/// We need to forward this version to the base class version
+	/// to prevent us from calling level(module_id) when we try to set
+	/// the global log level
+	log_level_e level(log_level_e l) noexcept
+	{
+		return LoggerBase::level(l);
+	}
+
+	/// Get the log level for ALL modules
+	/// We need to forward this version to the base class version
+	log_level_e level() const noexcept
+	{
+		return LoggerBase::level();
+	}
+
 	/// The following overrides should be used to log with module IDs
 
 	template<typename... Args>