Initial import

GeigerData.cpp

@@ -0,0 +1,53 @@
+#include "GeigerData.h"
+
+GeigerData::GeigerData(uint16_t sampleCount, uint16_t sampleSeconds,
+		float cpm_per_uSph) :
+		sampleCount(sampleCount), sampleSeconds(sampleSeconds), cpm_per_uSph(
+				cpm_per_uSph), pulsesPerSample(new uint16_t[sampleCount]) {
+	currentSample = 0;
+	for (int i = 0; i < sampleCount; i++) {
+		pulsesPerSample[i] = 0;
+	}
+}
+
+GeigerData::~GeigerData() {
+	delete[] pulsesPerSample;
+}
+
+uint16_t GeigerData::next(uint16_t index) {
+	return index + 1 < sampleCount ? index + 1 : 0;
+}
+
+uint16_t GeigerData::prev(uint16_t index) {
+	return index > 0 ? index - 1 : sampleCount - 1;
+}
+
+void GeigerData::addPulses(uint16_t pulses) {
+	if (pulsesPerSample[currentSample] <= UINT16_MAX - pulses)
+		pulsesPerSample[currentSample] += pulses;
+}
+
+void GeigerData::nextSample() {
+	currentSample = next(currentSample);
+	pulsesPerSample[currentSample] = 0;
+}
+
+uint16_t GeigerData::getCurrentSample() {
+	return currentSample;
+}
+
+uint32_t GeigerData::getPreviousPulses(uint16_t offset, uint16_t samples) {
+	uint32_t pulses = 0;
+	uint16_t index = (currentSample + sampleCount - offset) % sampleCount;
+	for (uint16_t i = 0; i < samples; i++) {
+		pulses += pulsesPerSample[index];
+		index = prev(index);
+	}
+
+	return pulses;
+}
+
+float GeigerData::toMicroSievertPerHour(uint32_t pulses, uint16_t samples) {
+	float cpm = pulses / (sampleSeconds / 60. * samples);
+	return cpm / cpm_per_uSph;
+}