Call a function from matlab labview

hi,
I would like to know how can I do to write a string on the front panel of Labview and write simultaneously in the Matlab command window.
Thank you

You can pass the string to a MATLAB script node and use eval() to execute it in a MATLAB environment.

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Segmentation fault when calling gpctr function from matlab mex file

I am trying to write a simple mex file for square wave generation using counter1 of PCI-6035E. I am using matlab's native compiler to compile and link with the nidaq32 library, ver.6.9.3, with no errors. When the mex function is called from a matlab script, however, the program crashes at the first call, to reset the counter. (I can generate a square wave with the test panel.)

Sorry for the delay in responding. I got caught up in other stuff. I am attaching my little program as requested. As you can see, I have just wrapped a mexFunction call round the example code for square wave generation. After I posted this, I tracked down a copy of BorlandC++, installed it on my computer and recompiled using that compiler and *b.* libraries. And would you know it, the program works. The question remains, though, why it doesn't work with Matlab's native lcc compiler. Plus, I have limited disk space, so if I can do without BorlandC, I can use the extra room. The runtime error was a Segmentation fault that I traced to the first call to GPCTR_Control.
Attachments:
pulsegen.c ‏4 KB

Can I call a function from a dll in LabVIEW that returns:double*string and int.?

I have a function from a dll that return a double* string and an integer. How can I call this function from LabVIEW? There is a possibility to work in LabVIEW with a double* string?

pcbv wrote:
> Hello all, The header of the function is:
>
> "HRESULT WRAPIEnumerateDevices(WRAPI_NDIS_DEVICE **ppDeviceList, long *plItems);"
>
> where WRAPI_NDIS_DEVICE have this form:
>
> typedef struct WRAPI_NDIS_DEVICE { 
> WCHAR *pDeviceName; 
> WCHAR *pDeviceDescription; }
> WRAPI_NDIS_DEVICE; 
>
> The function is from WRAPI.dll, used for communication with wireless card.
> For my application I need to call in LabVIEW this function.
Two difficulties I can see with this.
First the application seems to allocate the array of references
internally and return a pointer to that array. In that case there must
be another function which then deallocates that array again.
Then you would need to setup the function call to have a pointer to an
int32 number for the deviceList parameter and another pointer to int32
one for the plItems parameter.
Then create another function in your DLL similar to this:
HRESULT WRAPIEnumExtractDevice(WRAPI_NDIS_DEVICE *lpDeviceList, long i,
CHAR lpszDeviceName, LONG lenDeviceName,
CHAR lpszDeviceDesc, LONG lenDeviceDesc)
if (!lpDeviceList)
return ERROR_INV_PARAMETER;
if (lpDeviceList[i].pDeviceName)
WideCharToMultiByte(CP_ACP, 0,
pDeviceList[i].pDeviceName, -1,
lpszDeviceName, lenDeviceName,
NULL, NULL);
if (lpDeviceList[i].pDeviceName)
WideCharToMultiByte(CP_ACP, 0,
pDeviceList[i].pDeviceDescription, -1,
lpszDeviceDesc, lenDeviceDesc,
NULL, NULL);
return NO_ERROR;
Pass the int32 you got from the first parameter of the previous call as
a simple int32 passed by value to this function (and make sure you don't
call this function with a higher index than (plItems - 1) returned from
the first function.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Can LabVIEW call a function from a .sys file or is LabVIEW limited to dll access?

My vendor has sent me a .sys file with functions accessing their hardware. Can i call these function from labview directly or do I have to wrapper the .sys with a dll?

Well a sys file is a kernel device driver. LabVIEW does not have any direct way of accessing such a driver. The way kernel drivers are accessed is usually through a DLL which makes calls to WinAPI functions such as CreateFile(), ReadFile(), WriteFile(), CloseHandle() and DeviceIORequest(). Since these WinAPI calls are basically just DLL calls too, you could theoretically use the Call Library Node to call them and access the kernel device driver in such a way.
However for any kernel device driver with more than one or two device driver calls, it will certainly be easier in terms of development, debugging and maintenance of the code, to write actually a dedicated DLL in C/C++ for this device driver and access that DLL from LabVIEW, especially if you consider the LabVIEW datatype limitations when designing the DLL interface (Basically this same DLL can then be called from any other Windows development environment, be it Visual Basic (similar datatype limitation as LabVIEW), Delphi, (Visual) C, LabVIEW or also various scripting environments like Python and Lua.
Some of the necessary WindAPI calls are rather involved and pose quite a bit of trouble to get the parameter data right in LabVIEw.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Can Any one tell me what is the step in calling a function from a *.lib file in Labview application

Hi, I am working on Labview 8.0.
I am trying to communicate to a thrid party HW using the driver file he has provided to me.
The drive file is a *.lib file.
I am unable to call the function from the lib file.
I could get only from a DLL.
Pls help .
Regards
-Patil

patil wrote:
When it is possible in Lab Windows, why calling a function from a static library is prohibited?
I was trying to use Function node, but found that it is only for functions from a DLL file.
Will CIN be useful.?
LabWindows is not the same as LabVIEW. LabVIEW cannot call .lib files. LIB files are intermediary products and you need to use a wrapper DLL that's compatible with the object format of the .lib file. It's as simple as that. LabWindows creates C application and from that perspective is no different than a regular C
compiler. That's why you can call .lib files because that's how .lib
files are used.
A CIN, as pointed out, is something completely different and will not help you.

Calling a function from a DLL, exectution in background mode.

Dear Experts,
We have created an ABAP report the calls a function from a DLL file. If the report is executed in on-line mode the program calls and executes the function from the DLL, but if the ABAP programa is executed in background mode it doesnt calls the DLL function.
Do you know a way to solve the problem when executing in background mode?
Best regards.
Antonio

Hi Gabriel,
Let me explain in details about my DLL function.
We are importing the business partners from legacy system into the SAP CRM system, so at the moment we created the BP master data via BAPI, I get the name of the BP and this moment I call the function in the DLL file. I export the parameter name and I receive back a simplified string with the name reduced to a code. This code I get back from the dll it is insert in a Z table, so there is no interaction in the screen, all must be executed in background mode, because there are a lot of business partners to be converted in SAP system.
I am sending my code for your considerations.
Instancia a DLL
CREATE OBJECT dll 'MTCODE.CPFONET'.
IF sy-subrc NE 0.
    RAISE without_dll.
ENDIF.
Move para a tabela interna IT_NAME os valores recebidos na TI_NAME
it_name[] = ti_name[].
Para cada registro importado
LOOP AT it_name.
    CLEAR v_string_ret.
    wa_matchcode-zregid     = it_name-zregid.
    wa_matchcode-name1_text = it_name-name1_text.
    v_string = it_name-name1_text.
    CONDENSE v_string.
    TRANSLATE v_string TO UPPER CASE.
    CALL METHOD OF dll 'SetNome' EXPORTING #1 = v_string.
    CALL METHOD OF dll 'ExecMatch'.
    CALL METHOD OF DLL 'GetMCData' = v_string_ret.
    FREE OBJECT dll.
Preenche os campos do match-code de acordo com o retorno da DLL
    SPLIT v_string_ret
    AT '|'
    INTO wa_matchcode-zparmcln
         wa_matchcode-zparmcfn
         v_empty
         wa_matchcode-name_first
         wa_matchcode-name_last
         wa_matchcode-namemiddle.
Adiciona o registro com o match-code correspondente na TE_MATCHCODE
    APPEND wa_matchcode TO te_matchcode.
ENDLOOP.

How can I call a function from a procedure

I have a function named: f_calc_value which return the variable v_result. This function is part of a package.
How can I call this function from a new procedure I am creating?
Thanks

or refer this theread....calling function from procedure

How to call javascript function from PL/SQL procedure

Can anybody advice me how to call javascript function from PL/SQL procedure in APEX?

Hi,
I have a requirement to call Javascript function inside a After Submit Process.
clear requirement below:
1. User selects set of check boxes [ say user want to save 10 files and ticks 10 checkboxes]
2. user clicks on "save files" button
3. Inside a After submit process, in a loop, i want to call a javascript function for each of the file user want to save with the filename as a parameter.
Hope this clarify U.
Krishna.

Calling user function from Interface mapping

I am getting error "Bad query:ORA-00904: invalid identifier" while calling function in the mapping of an interface.
Can some one provide the syntax of calling user function from interface mapping.
Thanks,
RP

user452108 wrote:
Can some one provide the syntax of calling user function from interface mapping.Oracle's Call Iinterface, the OCI, does not work differently when coding using a Dvorak keyboard, or writing code using a pretty pink font in the editor.. or coding the call from an interface mapping (whatever the hell that that is).
You have 2 types of calls. SQL and PL/SQL.
To call a function via SQL, it can be done using a the standard cursor interface. E.g.
select MyFunkyFunction from dualIt will return the function value via a single row with a single column. The standard cursor fetch and close cursor calls are used.
To call it via PL/SQL, an anonymous PL/SQL block is needed, and the caller needs to use a bind variable to receive the value from the function. The anon block will look as follows:
begin
:bindVar := MyFunkyFunction;
end;Refer to your client's abstract layer for interfacing with the Oracle Call Interface, on how to deal with bind variables.

How to call oracle function from ejb3

i'm trying to call an oracle query-function from ejb3.
The oracle function:
create or replace FUNCTION getSecThreadCount(secId in NUMBER,avai in NUMBER)
RETURN SYS_REFCURSOR is cur SYS_REFCURSOR;
m_sql VARCHAR2(250);
BEGIN
m_sql:='select count(thrId) from thread where secId='|| secid||'
and thrAvai='|| avai;
open cur for m_sql;
return cur;
END;
I'v tried several ways to call it,but all failed:
1. the calling code:
public Object getSectionThreadCount(int secId,int avai){
 Query query=manager.createNativeQuery("{call getSecThreadCount(?,?) }");
 query.setParameter(1, secId);
 query.setParameter(2, avai);
 return query.getSingleResult();
but i got the exception:
Exception in thread "main" javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query; nested exception is: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query
javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query
Caused by: java.sql.SQLException: ORA-06550: row 1, col 7:
PLS-00221: 'GETSECTHREADCOUNT' not procedure or not defined
ORA-06550: row 1, col 7:
PL/SQL: Statement ignored
2. the calling code:
@SqlResultSetMapping(name = "getSecThreadCount_Mapping")
@NamedNativeQuery(name = "getSecThreadCount",
query = "{?=call getSecThreadCount(:secId,:avai)}",
resultSetMapping = "getSecThreadCount_Mapping",
hints = {@QueryHint(name = "org.hibernate.callable", value = "true"),
 @QueryHint(name = "org.hibernate.readOnly", value = "true")})
public Object getSectionThreadCount(int secId,int avai){
 Query query=manager.createNamedQuery("getSecThreadCount");
 query.setParameter("secId", secId);
 query.setParameter("avai", avai);
 return query.getSingleResult();
but i run into the exception:
Exception in thread "main" javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query; nested exception is: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query
javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query
Caused by: java.sql.SQLException: lost in index IN or OUT parameter:: 3
By the way, i have successfully called the function from hibernate. And i use oracle 11g, JBoss5 RC1.
Could anyone tell me how to call the function from EJB3?
Thanks.

Here's a working model:
package.procedure: (created in example schema scott)
CREATE OR REPLACE package body data_pkg as
type c_refcursor is ref cursor;
-- function that return all emps of a certain dept
function getEmployees ( p_deptId in number
return c_refcursor
is
 l_refcursor c_refcursor;
begin
 open l_refcursor
 for
 select e.empno as emp_id
 , e.ename as emp_name
 , e.job as emp_job
 , e.hiredate as emp_hiredate
 from emp e
 where e.DEPTNO = p_deptId;
 return l_refcursor;
end getEmployees;
end data_pkg;
/entity class:
package net.app.entity;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedNativeQuery;
import javax.persistence.QueryHint;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
@SuppressWarnings("serial")
@Entity
@Table (name="emp")
@SequenceGenerator(name = "EmployeeSequence", sequenceName = "emp_seq")
@NamedNativeQuery( name = "getEmpsByDeptId"
 , query = "{ ? = call data_pkg.getEmployees(?)}"
 , resultClass = Employee.class
 , hints = { @QueryHint(name = "org.hibernate.callable", value = "true")
 , @QueryHint(name = "org.hibernate.readOnly", value = "true")
public class Employee implements Serializable
 @Id
 @Column(name="emp_id")
 @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "EmployeeSequence")
 private int id;
 @Column(name="emp_name")
 private String name;
 @Column(name="emp_job")
 private String job;
 @Column(name="emp_hiredate")
 private Date hiredate;
 // constructor
 public Employee (){}
 // getters and setters
 public int getId()
 return id;
etc...session bean:
package net.app.entity;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import net.app.entity.Employee;
import net.app.iface.ScottAdmin;
@Stateless
public class ScottAdminImpl implements ScottAdmin
 @PersistenceContext
 private EntityManager entityManager;
 @SuppressWarnings("unchecked")
 public List<Employee> getEmployeesByDeptId(int deptId)
 ArrayList<Employee> empList;
 try
 Query query = entityManager.createNamedQuery("getEmpsByDeptId");
 query.setParameter(1, deptId);
 empList = (ArrayList<Employee>) query.getResultList();
 return empList;
 catch (Exception e)
 e.printStackTrace(System.out);
 return null;
}client:
package net.app.client;
import java.util.List;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import net.app.entity.Employee;
import net.app.iface.ScottAdmin;
public class ScottClient
 public static void main(String[] args)
 try
 // create local interface
 InitialContext ctx = new InitialContext();
 ScottAdmin adminInterface = (ScottAdmin) ctx.lookup("ScottAdminImpl/remote");
 // select employees by deptno
 int deptno = 20;
 List<Employee> empList = adminInterface.getEmployeesByDeptId(deptno);
 // output
 System.out.println("Listing employees:");
 for (Employee emp : empList)
 System.out.println(emp.getId() + ": " + emp.getName() + ", " + emp.getJob() + ", " + emp.getHiredate());
 catch (NamingException e)
 e.printStackTrace(System.out);
}Basically you just ignore the refcursor outbound parameter.
This is a stored function, have yet to try outbound refcursor parameters in stored procedures...
Edited by: _Locutus on Apr 2, 2009 2:37 PM

Calling a function from SQL prompt that returns a record

Hi,
I've been trying to execute a function that is present on a different database. for eg. I am loged on to a database say 'A' and trying to execute a function present in database 'B'. this function is present in a package 'X' which has 2 functions and two procedures. From the packages i am able to execute the two procedures and one of the function.
So i guess it is not a problem with the access permissions. The function that i am trying to call say function I has got 3 OUT
parameters and 1 IN parameter. the Function returns a record. When i try to execute this function i get an error. Can you please let me know as to how exactly i need to call this function from the SQL prompt...
thanx in advance
null

Hi Anand,
As your function has 3 OUT parameters and it returns a record you can not just call it from SQL Plus. You need to write small PL/SQL program and use variables to hold the OUT values and the returned record.
Good Luck,
RajKiran
null

Calling a function from within a movieclip

How do I do this, and Is it wrong to do it this way?
I have a movieclip on the timeline and within that movieclip
it has buttons which I've placed listeners. I'm doing it this way
rather than putting the code in the document class because the
buttons don't appear right away in the movieclip (not until around
frame 10). The function is defined in the document class because it
is used with other movieclips.
Anyone have an idea on how to properly do this?

Well, I'm at least not getting an error - however, nothing is
happening when I click the button to call the function (which is
indeed public). Inside the function is a simple trace. I've even
added a param to the function just for fun, and there's no error
when calling the function from the button.

Calling a function from a dll written by using visual studio c++

Hi, how can i call a function from a dll which is written by visual studio c++ in test stand? Although the functions in dll are exported and i've chosen c/c++ adapter, i saw no function in test stand. Is there a different step while i'm calling a function from a dll written by c++ than calling a function from a dll written by cvi?

Hey Sadik,
Selecting the C/C++ DLL Adapter Module should be sufficient for this. When you drag an action step for this onto the Main Step and navigate to the location of the DLL, the function list should populate and you should be able to select the function you want to use. If this is not the case, would you be able to post this DLL so that we can test this on our end?
Regards,
Jackie
DAQ Product Marketing Engineer
National Instruments

Calling ORACLE Functions from within CF Builder report

Hi, I have an ORACLE function that I would like to call from within my CF REPORT.
I know there is a section in the report builder where you can write coldfusion code to perform tasks, but I would rather simply call the ORACLE function for each detail row in the report
I do not want to call this function from within my main ORACLE query that I use for the report, so please don't suggest that.
Thanks so much.
-Jim

6.0.5 is not certified against 10g database, so I suggest to upgrade to 6.0.8.26 (6i patch 17) first to see if the problem is gone.

Calling a Function from another Function within CFC

Hi all,
I have many functions in my CFC that do various things, but
one query is a query that selects absolutely every record from a
table.
The thing is, I need to do a query like this in another
function to obtain only a recordcount of the same table used in
both separate functions. Instead of writing the query out again,
how can I utilise the function already written?
My question is, how can I invoke and use the results of a
query in one cffunction for another cffunction in the same CFC
component?
An example may look like the code attached...
Many thanks for your patience and help!
Mikey.

quote:
Originally posted by:
Dan Bracuk
Generally, to call a function from within a cfc, you do
exactly what you do outside a cfc.
For your specific case, if your requirements permit it, you
might consider caching the big query for a couple of seconds. Then
you can continously call the function and not have to wait for it
to run and bring back the data each time.
Do you mean to say that within a CFC function I can execute
the same cfinvoke tags I use in normal CFM pages?
Mikey.

Call a function from matlab labview

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