Add Rate class for running the code at fixed rate

flix/log.ino

@@ -4,10 +4,10 @@
 // In-RAM logging
 
 #include "vector.h"
+#include "util.h"
 
 #define LOG_RATE 100
 #define LOG_DURATION 10
-#define LOG_PERIOD 1.0 / LOG_RATE
 #define LOG_SIZE LOG_DURATION * LOG_RATE
 
 Vector attitudeEuler;
@@ -46,9 +46,8 @@ void prepareLogData() {
 void logData() {
 	if (!armed) return;
 	static int logPointer = 0;
-	static float logTime = 0;
-	if (t - logTime < LOG_PERIOD) return;
-	logTime = t;
+	static Rate period(LOG_RATE);
+	if (!period) return;
 
 	prepareLogData();