Hello
I am currently writing code for my Unreal Engine programme using NI-DAQmx C++ code to trigger actions in game when a digital input is triggered but have currently ran into a problem. I have attached the actor code I am using at the bottom of this post. When I press play in the editor, the code functions correctly and activates the Booleans shown in the EveryNCallback1 function, but once the editor is stopped the C++ actor still continues to create output logs from the code:
UE_LOG(LogTemp, Log, TEXT("Value = %f"), 1); which is due to the callback function still being activated I believe.
How do I only have this code activate when the editor is playing?
I have left the DoneCallback1 function blank as I have been trying new functions to solve this issue in there but nothing has seemed to work yet.
MyActor.h:
#pragma once
#include "CoreMinimal.h"
#include "ghc.h" //This is #include <NIDAQmx.h> but with slight edits
#include "GameFramework/Actor.h"
#include "MyActor.generated.h"
UCLASS()
class GHC_API AMyActor : public AActor
{
GENERATED_BODY()
public:
// Sets default values for this actor's properties
AMyActor();
UPROPERTY(EditInstanceOnly, BlueprintReadWrite)
bool Scrnsht1=false;
UPROPERTY(EditInstanceOnly, BlueprintReadWrite)
bool Scrnsht2=false;
UPROPERTY(EditInstanceOnly, BlueprintReadWrite)
bool Scrnsht3=false;
int main(void);
protected:
// Called when the game starts or when spawned
virtual void BeginPlay() override;
public:
// Called every frame
virtual void Tick(float DeltaTime) override;
};
MyActor.cpp
#include "MyActor.h"
#include "Logging/LogMacros.h"
int32 CVICALLBACK EveryNCallback1(TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void* callbackData);
int32 CVICALLBACK DoneCallback1(TaskHandle taskHandle, int32 status, void* callbackData);
bool Scrnsht1;
bool Scrnsht2;
bool Scrnsht3;
AMyActor::AMyActor()
{
// Set this actor to call Tick() every frame. You can turn this off to improve performance if you don't need it.
PrimaryActorTick.bCanEverTick = true;
}
// Called when the game starts or when spawned
void AMyActor::BeginPlay()
{
Super::BeginPlay();
main();
}
// Called every frame
void AMyActor::Tick(float DeltaTime)
{
Super::Tick(DeltaTime);
}
int AMyActor::main(void) {
int32 error = 0;
TaskHandle taskHandle = 0;
char errBuff[2048] = { '\0' };
/*********************************************/
// DAQmx Configure Code
/*********************************************/
DAQmxCreateTask("", &taskHandle);
(DAQmxCreateAIVoltageChan(taskHandle, "Dev1/ai0", "", DAQmx_Val_Cfg_Default, -10.0, 10.0, DAQmx_Val_Volts, NULL));
(DAQmxCfgSampClkTiming(taskHandle, "", 10000.0, DAQmx_Val_Rising, DAQmx_Val_FiniteSamps, 1000));
(DAQmxCfgDigEdgeStartTrig(taskHandle, "/Dev1/PFI1", DAQmx_Val_Rising));
(DAQmxRegisterEveryNSamplesEvent(taskHandle, DAQmx_Val_Acquired_Into_Buffer, 1000, 0, EveryNCallback1, NULL));
(DAQmxRegisterDoneEvent(taskHandle, 0, DoneCallback1, NULL));
(DAQmxStartTask(taskHandle));
//UE_LOG(LogTemp, Log, TEXT("Value = %f"), 1);
getchar();
return 0;
}
int32 CVICALLBACK EveryNCallback1(TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void* callbackData)
{
int32 error = 0;
char errBuff[2048] = { '\0' };
static int totalRead = 0;
int32 read = 0;
float64 data[1000];
/*********************************************/
// DAQmx Read Code
/*********************************************/
(DAQmxReadAnalogF64(taskHandle, 1000, 10.0, DAQmx_Val_GroupByScanNumber, data, 1000, &read, NULL));
UE_LOG(LogTemp, Log, TEXT("Value = %f"), 1);
if (read > 0) {
if (Scrnsht1) {
if (Scrnsht2) {
if (Scrnsht3) {
UE_LOG(LogTemp, Log, TEXT("Commence Path Planning"), 1);
}
else {
Scrnsht3 = true;
}
}
else {
Scrnsht2 = true;
}
}
else {
Scrnsht1 = true;
}
UE_LOG(LogTemp, Warning, TEXT("Boolean 2 is %s"), Scrnsht2 ? TEXT("true") : TEXT("false"));
DAQmxStopTask(taskHandle);
fflush(stdout);
(DAQmxStartTask(taskHandle));
}
return 0;
}
int32 CVICALLBACK DoneCallback1(TaskHandle taskHandle, int32 status, void* callbackData)
{
int32 error = 0;
char errBuff[2048] = { '\0' };
// Check to see if an error stopped the task.
return 0;
}
Any help would be appreciated 🙂
