Good morning,
I have a little issue with my LabWindows program, I will explain it in the following lines.
I did a test bench with an Arduino Mega to perform 10 tests in a specific DUT and I control the entire system with a LabWindows GUI. Every single communication is ok, I send (from LabWindows to Arduino) and I receive (from Arduino to LabWindows) the correct value.
The problem is when Arduino makes test: if I want to stop the tests list in any time with LabWindows GUI (Command Button), I can't do it because the interface is freezed, so I can't push any button to click in case of emergency. I always wait the end of the tests to interact with the program.
HW parts:
- Arduino Mega;
- Cable TTL-234X-5V (with drivers installed);
- HP ZBook 15v G5.
SW used:
- Windows 10;
- Arduino IDE 1.8.9;
- LabWindows/CVI v17.0.0 (2017).
Configuration:
GND (Arduino Mega) --> Black wire GND (TTL-234X-5V);
Digital19 RX1 (Arduino Mega) --> Orange wire TXD (TTL-234X-5V);
Digital18 TX1 (Arduino Mega) --> Yellow wire RXD (TTL-234X-5V).
Windows S.O. recognizes the configuration above in "USB Serial Port (COM3)".
The code that I used is the following (I simplified it):
COMMAND BUTTON to start tests list
int CVICALLBACK testListArduino (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
case EVENT_LEFT_CLICK:
iTest = 1;
do
{
if(iTest == 1)
{
firstTest(panel, info);
if(iRS232Error != 0)
iTest = 11;
else
iTest = 2;
}
else if(iTest == 2)
{
secondTest(panel, info);
if(iRS232Error != 0)
iTest = 11;
else
iTest = 3;
}
...
else if(iTest == 10)
{
tenTest(panel, info);
iTest = 11;
}
}while(iTest < 11);
break;
}
return 0;
}FUNCTION TEST (for example first)
...
#define READTERM 10
int iPortArduino = 3;
...
void firstTest(int panel, char info[LENGTH_INFO])
{
dResult[0] = 0;
dResult[1] = 0;
dResult[2] = 0;
SetCtrlVal(panel, PanelMain_STRING, "A"); // Letter A in Arduino is the first test case
DisableBreakOnLibraryErrors ();
iRS232Error = OpenComConfig (iPortArduino, "", 9600, 0, 8, 1, 512, 512); // Open port COM
EnableBreakOnLibraryErrors ();
if(iRS232Error != 0) // If the COM is incorrect
{
MessagePopup("Error","Error.");
dResult[0] = -1;
dResult[1] = -1;
dResult[2] = -1;
return;
}
SetComTime (iPortArduino, 10);
SetCTSMode (iPortArduino, LWRS_HWHANDSHAKE_OFF);
FlushInQ(iPortArduino);
GetCtrlVal(panel, PanelMain_STRING, info); // info = 'A'
Delay(1); // I used this to delay serial port
ComWrt(iPortArduino, info, strlen(info)); // Send A to Arduino
inqlen = GetInQLen (iPortArduino);
bytes_read = ComRdTerm (iPortArduino, read_data, 10, READTERM); // Take result1 from arduino script with Serial1.println(...);
CopyString (tbox_read_data, 0, read_data, 0, bytes_read);
dResult[0] = atof(&tbox_read_data);
bytes_read = ComRdTerm (iPortArduino, read_data, 10, READTERM); // Take result2 from arduino script with Serial1.println(...);
CopyString (tbox_read_data, 0, read_data, 0, bytes_read);
dResult[1] = atof(&tbox_read_data);
bytes_read = ComRdTerm (iPortArduino, read_data, 10, READTERM); // Take result3 from arduino script with Serial1.println(...);
CopyString (tbox_read_data, 0, read_data, 0, bytes_read);
dResult[2] = atof(&tbox_read_data);
FlushInQ(iPortArduino);
CloseCom (iPortArduino); // Close port COM
return;
}Do you have any ideas to create a stop button for emergency in CVI? Or, with this managing, is impossible (i.e. maybe OpenComConfig, SetComTime, CloseCom create a particular condition to freeze CVI)?
Thank you and have a nice day.
Best Regards,
Stefano
