Title: Re: SimConnect C++ and CS767 LVARS...
Post by Dave Snyder WI on Mar 19th, 2021 at 10:33pm
Dave Snyder WI wrote on Mar 19th, 2021 at 3:18am:| Does anyone have any experience writing a C++ or C# application that uses SimConnect. Specifically, I am writing an application that needs to R/W the CS767 LVARS for my home cockpit. See other post recently here by me - I am subscribing to SIOC events (for my OpenCockpits hardware) and need to sync button presses etc in my hardware to the SIM. Additionally, I will need to read values from CS767 LVARS to update my various LEDs etc. Any advice would be greatly appreciated. |
Found a great video on YouTube () that I think gets me very close... I'll paste in the code that looks to at least get the built-in variables for generic aircraft, just not quite sure how to change the request for LVARS - I wonder if it is simple as putting in the klid number instead of the #define of the variable? #include <windows.h>
#include <iostream>
#include "SimConnect.h"
int quit = 0;
HANDLE hSimConnect = NULL;
static enum DATA_DEFINE_ID {
DEFINITION_1,
};
static enum DATA_REQUEST_ID {
REQUEST_1,
REQUEST_2,
};
struct SimResponse {
double altitude;
int32_t heading;
int32_t speed;
int32_t vertical_speed;
};
void CALLBACK MyDispatchProc1(SIMCONNECT_RECV* pData, DWORD cbData, void* pContext) {
switch (pData->dwID)
{
case SIMCONNECT_RECV_ID_SIMOBJECT_DATA:
{
SIMCONNECT_RECV_SIMOBJECT_DATA* pObjData = (SIMCONNECT_RECV_SIMOBJECT_DATA*)pData;
switch (pObjData->dwRequestID)
{
case REQUEST_1:
SimResponse* pS = (SimResponse*)&pObjData->dwData;
std::cout
<< "\rAltitude: " << pS->altitude
<< " - Heading: " << pS->heading
<< " - Speed (knots): " << pS->speed
<< " - Vertical Speed: " << pS->vertical_speed
<< std::flush;
break;
}
break;
}
case SIMCONNECT_RECV_ID_QUIT:
{
quit = 1;
break;
}
default:
break;
}
}
bool initSimEvents() {
HRESULT hr;
if (SUCCEEDED(SimConnect_Open(&hSimConnect, "Client Event Demo", NULL, 0, NULL, 0))) {
std::cout << "\nConnected To Microsoft Flight Simulator 2020!\n";
// DATA
hr = SimConnect_AddToDataDefinition(hSimConnect, DEFINITION_1, "Indicated Altitude", "feet");
hr = SimConnect_AddToDataDefinition(hSimConnect, DEFINITION_1, "HEADING INDICATOR", "degrees", SIMCONNECT_DATATYPE_INT32);
hr = SimConnect_AddToDataDefinition(hSimConnect, DEFINITION_1, "Airspeed Indicated", "knots", SIMCONNECT_DATATYPE_INT32);
hr = SimConnect_AddToDataDefinition(hSimConnect, DEFINITION_1, "VERTICAL SPEED", "Feet per second", SIMCONNECT_DATATYPE_INT32);
// EVERY SECOND REQUEST DATA FOR DEFINITION 1 ON THE CURRENT USER AIRCRAFT (SIMCONNECT_OBJECT_ID_USER)
hr = SimConnect_RequestDataOnSimObject(hSimConnect, REQUEST_1, DEFINITION_1, SIMCONNECT_OBJECT_ID_USER, SIMCONNECT_PERIOD_SECOND);
// Process incoming SimConnect Server messages
while (quit == 0) {
// Continuously call SimConnect_CallDispatch until quit - MyDispatchProc1 will handle simulation events
SimConnect_CallDispatch(hSimConnect, MyDispatchProc1, NULL);
Sleep(1);
}
hr = SimConnect_Close(hSimConnect);
return true;
}
else {
std::cout << "\nFailed to Connect!!!!\n";
return false;
}
}
int main() {
initSimEvents();
return 0;
}
For example, in the code above, I could try replacing "HEADING INDICATOR" with the numeric klid? Anyone know? I'll code this up this weekend and find out...
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