Add system events handling

include/sta/system_event.hpp

@@ -0,0 +1,45 @@
+#ifndef STA_SYSTEM_EVENT_HPP
+#define STA_SYSTEM_EVENT_HPP
+
+#include <stdint.h>
+
+
+// System event flags
+//
+
+#define STA_SYSTEM_EVENT_STARTUP 0x00100000U
+
+
+namespace sta
+{
+	/**
+	 * @brief Signal system events
+	 *
+	 * @param flags System event flags
+	 */
+	void signalSystemEvents(uint32_t flags);
+
+	/**
+	 * @brief Wait for system event.
+	 *
+	 * @param flags		System event flags
+	 * @param options 	osFlagsWaitAll or osFlagsWaitAny (osFlagsNoClear always set)
+	 * @param timeout	Wait timeout (0 = instant, osWaitForever = infinite)
+	 */
+	void waitForSystemEvents(uint32_t flags, uint32_t options, uint32_t timeout);
+	
+	/**
+	 * @brief Signal startup system event
+	 */
+	void signalStartupCompleted();
+
+	/**
+	 * @brief Wait for startup system event.
+	 *
+	 * Blocking while waiting
+	 */
+	void waitForStartup();
+} // namespace sta
+
+
+#endif // STA_SYSTEM_EVENT_HPP

src/system_event.cpp

@@ -0,0 +1,32 @@
+#include <sta/system_event.hpp>
+
+#include <cmsis_os2.h>
+
+
+extern osEventFlagsId_t systemEventHandle;
+
+
+namespace sta
+{
+	void signalSystemEvents(uint32_t flags)
+	{
+		osEventFlagsSet(systemEventHandle, flags);
+	}
+	
+	
+	void waitForSystemEvents(uint32_t flags, uint32_t options, uint32_t timeout)
+	{
+		osEventFlagsWait(systemEventHandle, flags, options | osFlagsNoClear, timeout);
+	}
+	
+	
+	void signalStartupCompleted()
+	{
+		signalSystemEvents(STA_SYSTEM_EVENT_STARTUP);
+	}
+
+	void waitForStartup()
+	{
+		waitForSystemEvents(STA_SYSTEM_EVENT_STARTUP, osFlagsWaitAll, osWaitForever);
+	}
+} // namespace sta