Moved embedded user interface example into own directory

examples/embedded_ui/UI.c

@@ -0,0 +1,48 @@
+#include "UI.h"
+#include "DISPLAY.h"
+#include "SYSTEM.h"
+#include <string.h>
+
+static unsigned int missed_irq_counter;
+button_cbk_t button_cbk;
+
+
+void UI_init()
+{
+    DISPLAY_init();
+    SYSTEM_register_irq(UI_button_irq_handler, IRQ_GPIO_2);
+    button_cbk = 0;
+    missed_irq_counter = 0;
+}
+
+unsigned int UI_get_missed_irqs()
+{
+	return missed_irq_counter;
+}
+
+void UI_button_irq_handler()
+{
+	if(button_cbk)
+	{
+		button_cbk();
+	}
+	else
+	{
+		missed_irq_counter++;
+	}
+}
+
+void UI_register_button_cbk(button_cbk_t cbk)
+{
+	button_cbk = cbk;
+}
+
+void UI_write_line(char *line)
+{
+	static char out[27];
+	strncpy(out, line, 26);
+	out[26] = '\0';
+	if(DISPLAY_get_line_capacity() == DISPLAY_get_line_insert_index())
+		DISPLAY_clear();
+	DISPLAY_output(out);
+}