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

communication/message/livedatamessage.cpp

@@ -12,4 +12,14 @@ void LiveDataCommandMessage::appendSignalArg(LiveDataValueType valueType) {
 	arg->valueType = valueType;
 }
 
+void LiveDataSetValueMessage::appendSetValue(LiveDataValueType valueType, const LiveDataValue& value) {
+	auto& arg = args.emplace_back(std::make_shared<LiveDataArgument>());
+	arg->objectType = LiveDataObjectType::MISC;
+	arg->objectIndex = 0u;
+	arg->signalIndex = 0u;
+	arg->valueType = valueType;
+
+	values.push_back(std::make_shared<LiveDataValue>(value));
+}
+
 } // namespace icsneo

communication/packet/livedatapacket.cpp

@@ -99,6 +99,33 @@ bool HardwareLiveDataPacket::EncodeFromMessage(LiveDataMessage& message, std::ve
 			clearMsg->cmd = static_cast<uint32_t>(message.cmd);
 			break;
 		}
+		case LiveDataCommand::SET_VALUE: {
+			auto setValMsg = reinterpret_cast<LiveDataSetValueMessage*>(&message);
+			const auto numArgs = setValMsg->args.size();
+			if(numArgs) {
+				payloadSize = static_cast<uint16_t>(sizeof(LiveDataSetValue) + (sizeof(LiveDataSetValueEntry) * (numArgs-1)));
+				bytestream.resize((payloadSize + sizeof(ExtendedCommandHeader)),0);
+				LiveDataSetValue* out = reinterpret_cast<LiveDataSetValue*>(bytestream.data() + sizeof(ExtendedCommandHeader));
+				out->version = icsneo::LiveDataUtil::LiveDataVersion;
+				out->cmd = static_cast<uint32_t>(setValMsg->cmd);
+				if(!setValMsg->handle)
+					setValMsg->handle = LiveDataUtil::getNewHandle();
+				out->handle = setValMsg->handle;
+				out->numSetValues = (uint32_t)numArgs;
+				for(size_t i = 0; i < numArgs; ++i) {
+					out->values[i].arg.objectType = setValMsg->args[i]->objectType;
+					out->values[i].arg.objectIndex = setValMsg->args[i]->objectIndex;
+					out->values[i].arg.signalIndex = setValMsg->args[i]->signalIndex;
+					out->values[i].arg.valueType = setValMsg->args[i]->valueType;
+					out->values[i].value.value = setValMsg->values[i]->value;
+					out->values[i].value.header.length = sizeof(LiveDataValue::value);
+				}
+			} else {
+				report(APIEvent::Type::LiveDataInvalidArgument, APIEvent::Severity::Error);
+				return false;
+			}
+			break;
+		}
 		default: {
 			report(APIEvent::Type::LiveDataInvalidCommand, APIEvent::Severity::Error);
 			return false;