Hello
I have a strange issue with Dynamic Memory being corrupt during execution of my program. I have two functions below, both in the same file. The InitializePanels function gets executed as soon as I execute my main panel program. The cls_damper command gets called from some other routine during processing. The taskInletDamper and taskOutletDampers are only used in the file below.
ISSUE 1: The Dynamic Memory Corrupt error shows up the first time the system tries to do a DAQmxWriteAnalogScalarF64 in the cls_damper routine - the system points to that line number on the pop up message, and interestingly the column number is always located on the last NULL argument passed there.
ISSUE 2: In the .h file declaration, if I include the NIDAQ.h file before the PC_Equates file, then the system gives me an error during compilation, saying there is a redefination of TRUE and FALSE in the PC_Equates file. The PC_Equates file basically has a couple of lines #defining TRUE as 1 and FALSE as 0. If, as shown below, I change the order of PC_Equates and NIDAQ.h, then the error goes away.
Any inputs will be greatly appreciated.
Thanks
#include <userint.h>
#include <utility.h>
#include <DAQmxIOctrl.h>
#include <NIDAQmx.h>
#include "PC_Equates.h"
#define DAQmxErrChk(functionCall) if( DAQmxFailed(error=(functionCall)) ) goto Error; else
#define MSG_OPN_DAMPERS "17-pr_opn_dampers"
#define MSG_CLS_DAMPERS "17-pr_cls_dampers"
#define PR_CHK_PS 4
#define PR_MES_END 18
void pr_cls_dampers(void);
void pr_opn_dampers(void);
extern void AddScrollLine (char *msg);
int error=0;
TaskHandle taskInletDamper = 0;
TaskHandle taskExhaustDamper = 0;
TaskHandle taskDIOHandle = 0;
char chanInlet[128] = "PXI1Slot5/ao0";
char chanExhaust[128] = "PXI1Slot5/ao1";
char chanDigital[128] = "PXI1Slot5/port0/line4:5";
double min = 0.0, max = 10.0;
float64 data;
uInt8 dioData[2];
int i;
char errBuff[2048]={'\0'};
extern int teststep, step_iter;
extern int testTickCtr;
void InitializeDamperControls(void)
{
static int iWritten;
#if(USE_NI_IO == 1)
//--- Create and start the Inlet Damper task ---------------
DAQmxErrChk (DAQmxCreateTask ("", &taskInletDamper));
DAQmxErrChk (DAQmxCreateAOVoltageChan (taskInletDamper, chanInlet, "", min, max, DAQmx_Val_Volts, ""));
DAQmxErrChk (DAQmxStartTask(taskInletDamper));
//--- Create and start the Exhaust Damper task -------------
DAQmxErrChk (DAQmxCreateTask ("", &taskExhaustDamper));
DAQmxErrChk (DAQmxCreateAOVoltageChan (taskExhaustDamper, chanExhaust, "", min, max, DAQmx_Val_Volts, ""));
DAQmxErrChk (DAQmxStartTask(taskExhaustDamper));
//--- Create and start the digital on/off Damper task ------
DAQmxErrChk (DAQmxCreateTask ("", &taskDIOHandle));
DAQmxErrChk (DAQmxCreateDOChan (taskDIOHandle, chanDigital,"",DAQmx_Val_ChanForAllLines));
DAQmxErrChk (DAQmxStartTask(taskDIOHandle));
for (i=0; i<2; i++) {
dioData[i] = 1;
}
//--- Enable both damper motors ----------------------------
DAQmxErrChk (DAQmxWriteDigitalLines (taskDIOHandle, 1, 1, 10.0, DAQmx_Val_GroupByChannel, dioData, &iWritten, NULL));
//----------------------------------------------------------
Error:
if (DAQmxFailed(error)) {
DAQmxGetExtendedErrorInfo(errBuff,2048);
MessagePopup("DAQmx Error",errBuff);
}
if (taskInletDamper!=0 ) {
DAQmxStopTask(taskInletDamper);
DAQmxClearTask(taskInletDamper);
}
if (taskExhaustDamper!=0 ) {
DAQmxStopTask(taskExhaustDamper);
DAQmxClearTask(taskExhaustDamper);
}
if (taskDIOHandle!=0 ) {
DAQmxStopTask(taskDIOHandle);
DAQmxClearTask(taskDIOHandle);
}
#endif
}
void pr_cls_dampers(void) // System activates and closes dampers.
{
float64 damper_voltage = 10.0;
if(USE_NI_IO == 1) {
if ( taskInletDamper == 0 ) {
AddScrollLine("Inlet Damper Task Not Available\n");
}
else {
DAQmxWriteAnalogScalarF64 (taskInletDamper, 1, 10.0, damper_voltage, NULL);
}
if (taskExhaustDamper == 0) {
AddScrollLine("Exhaust Damper Task Not Available\n");
}
else {
DAQmxWriteAnalogScalarF64 (taskExhaustDamper, 1, 10.0, damper_voltage, NULL);
}
}
AddScrollLine (MSG_CLS_DAMPERS);
testTickCtr = 10; // Test rate to 1 sec rate.
step_iter = 0; teststep = PR_CHK_PS;
}
