Add statistics reset command

fantemp/statistics.cpp

@@ -48,6 +48,14 @@ void Statistics::callback()
 	}
 }
 
+void Statistics::reset()
+{
+	for (uint8_t i = 0; i < TEMPERATURE_RANGE; ++i) {
+		m_temperatureHistogram[i] = 0;
+		g_eepTemperatureHistogram[i] = 0;
+	}
+}
+
 uint8_t Statistics::getMinTemperature()
 {
 	for (uint8_t i = 0; i < TEMPERATURE_RANGE; ++i) {

fantemp/statistics.hpp

@@ -8,6 +8,7 @@ class Statistics {
 
 	static void init();
 	static void callback();
+	static void reset();
 
 	static uint8_t getMinTemperature();
 	static uint8_t getMaxTemperature();

fantemp/terminal.hpp

@@ -22,10 +22,11 @@ GF(MONITOR_CMD, "monitor");
 GF(BOOTLOADER_CMD, "bootloader");
 GF(UPTIME_CMD, "uptime");
 GF(STATISTICS_CMD, "statistics");
+GF(RESET_CMD, "reset");
 GF(HISTOGRAM_CMD, "histogram");
 
 GF(VERSION_CMD, "version");
-GF(VERSION, "1.5");
+GF(VERSION, "1.6");
 
 static inline bool substringEquals(const char *str, const ::detail::FlashString *flashStr, const size_t &size)
 {
@@ -149,6 +150,8 @@ class Terminal {
 					printStatistics();
 				} else if (substringEquals(m_inputBuffer, detail::HISTOGRAM_CMD, m_inputSize)) {
 					printHistogram();
+				} else if (stringEquals(m_inputBuffer, detail::RESET_CMD, m_inputSize)) {
+					handleReset();
 				} else if (substringEquals(m_inputBuffer, detail::VERSION_CMD, m_inputSize)) {
 					printVersion();
 				} else {
@@ -179,6 +182,7 @@ class Terminal {
 		m_serial << detail::UPTIME_CMD << F(" .....: shows system uptime") << detail::ENDL;
 		m_serial << detail::STATISTICS_CMD << F(" .: prints overall statistics like min and max temp") << detail::ENDL;
 		m_serial << detail::HISTOGRAM_CMD << F(" ..: prints a histogram of the temperature") << detail::ENDL;
+		m_serial << detail::RESET_CMD << F(" ......: resets statistics to 0 in EEPROM and RAM") << detail::ENDL;
 		m_serial << detail::VERSION_CMD << F(" ....: displays firmware version") << detail::ENDL;
 	}
 
@@ -243,15 +247,35 @@ class Terminal {
 
 	static void printStatistics()
 	{
-		m_serial << F("Minimum temperature .: ") << Statistics::getMinTemperature() << F(" C") << detail::ENDL;
-		m_serial << F("Maximum temperature .: ") << Statistics::getMaxTemperature() << F(" C") << detail::ENDL;
+		const auto minTemp = Statistics::getMinTemperature();
+		const auto maxTemp = Statistics::getMaxTemperature();
+
+		m_serial << F("Minimum temperature .: ");
+		if (minTemp != Statistics::TEMPERATURE_RANGE) {
+			m_serial << minTemp << F(" C");
+		} else {
+			m_serial << F("Not available");
+		}
+
+		m_serial << detail::ENDL << F("Maximum temperature .: ");
+		if (maxTemp != Statistics::TEMPERATURE_RANGE) {
+			m_serial << maxTemp << F(" C");
+		} else {
+			m_serial << F("Not available");
+		}
+		m_serial << detail::ENDL;
 	}
 
 	static void printHistogram()
 	{
 		const auto totalSamples = Statistics::getTotalHistogramSamples();
+
+		if (totalSamples > 0) {
 			const auto maximumSamples = Statistics::getHighestHistogramSamples();
-		const auto normalizationFactor = (maximumSamples / 100 > 1) ? (maximumSamples / 100) : 1;
+			auto normalizationFactor = (maximumSamples / 100 > 1) ? (maximumSamples / 100) : 1;
+
+			while (maximumSamples / normalizationFactor > 100)
+				++normalizationFactor;
 
 			for (uint8_t t = Statistics::getMinTemperature(); t <= Statistics::getMaxTemperature(); ++t) {
 				const auto histogramSamples = Statistics::getHistogram(t);
@@ -265,6 +289,16 @@ class Terminal {
 				}
 				m_serial << detail::ENDL;
 			}
+		} else {
+			m_serial << "There is no data yet!" << detail::ENDL;
+		}
+	}
+
+	static void handleReset()
+	{
+		m_serial << F("Resetting statistics in EEPROM and RAM") << detail::ENDL;
+		Statistics::reset();
+		m_serial << F("Reset statistics") << detail::ENDL;
 	}
 
 	static void printVersion()