Moved measuring into separate thread (thus decreasing response to registers change)

defrost.cpp

@@ -1,6 +1,7 @@
 #include "configparser.h"
 #include "globals.h"
 #include "ModbusServiceListenThread.h"
+#include "TemperatureThread.h"
 #include "libdiff.h"
 
 #include <climits>
@@ -15,31 +16,6 @@
 
 const int BASE_DEFAULT = 0x3BC;
 
-string Read(FILE *f)
-{
-	char buffer[256];
-	string result = "";
-	while (fgets(buffer, sizeof(buffer), f) != nullptr)
-	{
-		result += buffer;
-	}
-	return result;
-}
-
-void temperature_update(const string &cmd)
-{
-	// other helper variables
-	float temperature = 1.5; 
-	auto output = popen(cmd.c_str(), "r");
-	if (output == nullptr) return;
-	string value = Read(output);
-	pclose(output);
-	temperature = atof(value.c_str());
-
-	registers[REGISTER_CUR_TEMP] = (int)(temperature * 100);
-	registers[REGISTER_SECONDARY_TEMP] = (int)(temperature * 100);
-}
-
 int main(int argc, char *argv[])
 {
 	try {
@@ -89,12 +65,15 @@ int main(int argc, char *argv[])
 		ModbusServiceListenThread *modbus_service = new ModbusServiceListenThread(&mainlog, atoi(cfg.GetParam("ListenPort").c_str()));
 		modbus_service->Start();
 
+		// run temperature update thread
+		TemperatureThread *temperature_thread = new TemperatureThread(measure_command);
+		temperature_thread->Start();
+
 		int io_value = 0;
-		// loop forever updating the temperature values every second
+		// loop forever tweaking relay state according to control 
 		while (true)
 		{
 			LockMutex(register_mutex);
-			temperature_update(measure_command);
 			int mode = registers[REGISTER_MODE];
 			if (mode == 0)
 			{