Device: Add setValueLiveData()

* Adds the ability to set a CoreMini signal value via the live data interface
* Adds definition for the Manual Trigger and DAQ Enable signals

communication/livedata.cpp

@@ -1,4 +1,5 @@
 #include "icsneo/communication/livedata.h"
+#include <cmath>
 namespace icsneo {
 
 namespace LiveDataUtil {
@@ -18,5 +19,61 @@ double liveDataValueToDouble(const LiveDataValue& val) {
 	return val.value * liveDataFixedPointToDouble; 
 } 
 
+bool liveDataDoubleToValue(const double& dFloat, LiveDataValue& value) {
+	union {
+		struct
+		{
+			uint32_t ValueFractionPart;
+			int32_t ValueInt32;
+		} parts;
+		int64_t ValueLarge;
+	} CminiFixedPt;
+	constexpr double CM_FIXED_POINT_TO_DOUBLEVALUE = (1.0 / (double)(1ULL << 32)); // 2^-32
+	constexpr double CM_DOUBLEVALUE_TO_FIXED_POINT = ((double)(1ULL << 32)); // 2^32
+	// Use const for limits (C++98 compatible)
+	const double INT32_MAX_DOUBLE =
+		static_cast<double>(std::numeric_limits<int32_t>::max()) + (1.0 - std::numeric_limits<double>::epsilon());
+	const double INT32_MIN_DOUBLE = static_cast<double>(std::numeric_limits<int32_t>::min());
+	const double MIN_FIXED_POINT_DOUBLE = (double)(1ull * CM_FIXED_POINT_TO_DOUBLEVALUE);
+
+	// This needs to be assigned separately, otherwise, for dFloat >= 2^31,
+	// long double dBigFloat = dFloat * CM_DOUBLEVALUE_TO_FIXED_POINT overflows
+	// long long (value is >= 2^63) and so the assignment ValueLarge = dBigFloat is undefined
+
+	int32_t intPart; //creating temp variable due to static analysis warning about writing and reading to different union members
+	if(dFloat < 0.0)
+		intPart = (int32_t)std::floor(dFloat);
+	else
+		intPart = (int32_t)dFloat;
+
+	//using temp varialbes to avoid static analysis warning about read/write to different union members
+	double frac = dFloat - (double)(intPart);
+	uint32_t fracPart = (uint32_t)std::floor((frac * CM_DOUBLEVALUE_TO_FIXED_POINT) + 0.5);
+
+	//write temp vars back into the union
+	CminiFixedPt.parts.ValueInt32 = intPart;
+	CminiFixedPt.parts.ValueFractionPart = fracPart;
+	value.value = CminiFixedPt.ValueLarge;
+
+	if(dFloat == (double)0.0)
+		return true;
+
+	//check if double can be stored as 32.32
+	// 0x1 0000 0000 0000 0000 * CM_FIXED_POINT_TO_DOUBLEVALUE = 0x1 0000 0000
+	if(dFloat > INT32_MAX_DOUBLE || dFloat < INT32_MIN_DOUBLE) {
+		EventManager::GetInstance().add(APIEvent::Type::FixedPointOverflow, APIEvent::Severity::Error);
+		return false;
+	}
+
+	// Use absolute value for minimum fixed point check
+	double absFloat = (dFloat < 0.0) ? -dFloat : dFloat;
+	if(absFloat < MIN_FIXED_POINT_DOUBLE) {
+		EventManager::GetInstance().add(APIEvent::Type::FixedPointPrecision, APIEvent::Severity::Error);
+		return false;
+	}
+
+	return true;
+}
+
 } // namespace LiveDataUtil
 } // namespace icsneo