C/C++ for LJM - Windows, Mac, Linux

LJM C/C++ Examples Windows/Mac/Linux (Software Platform)

Windows/Mac/Linux

C/C++ examples for the LJM library. Also contains some header files:

LJM_Utilities.h - contains useful functions
stream/LJM_StreamUtilities.h - contains useful stream functions
LabJackMModbusMap.h - contains declarations for register addresses, names, and types

Release

Download C_C++_LJM_2019-05-20.zip

Details

Updated for LJM 1.2001.

New changes:

LJM_StreamUtilities.h: Renamed CountAndOutputNumSkippedScans -> CountAndOutputNumSkippedSamples.
LJM_Utilities.h: Added Get().
Added cstring header to sd_util.hpp. Fixes CentOS 6 compilation.
Minor URL updates.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-05-20.zip
$ cd C_C++_LJM_2019-05-20
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

All Versions

C_C++_LJM_2019-05-20.zip

Download C_C++_LJM_2019-05-20.zip

05/20/2019

Release

Details

Updated for LJM 1.2001.

New changes:

LJM_StreamUtilities.h: Renamed CountAndOutputNumSkippedScans -> CountAndOutputNumSkippedSamples.
LJM_Utilities.h: Added Get().
Added cstring header to sd_util.hpp. Fixes CentOS 6 compilation.
Minor URL updates.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-05-20.zip
$ cd C_C++_LJM_2019-05-20
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

C_C++_LJM_2019-05-20-beta.zip

Download C_C++_LJM_2019-05-20-beta.zip

05/20/2019

Beta

Details

Updated for LJM 1.2001.

New changes:

LJM_StreamUtilities.h: Renamed CountAndOutputNumSkippedScans -> CountAndOutputNumSkippedSamples.
LJM_Utilities.h: Added Get().
Added cstring header to sd_util.hpp. Fixes CentOS 6 compilation.
Minor URL updates.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-05-20-beta.zip
$ cd C_C++_LJM_2019-05-20
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

C_C++_LJM_2019-03-27.zip

Download C_C++_LJM_2019-03-27.zip

03/27/2019

Release

Details

Updated for LJM 1.2000.

New changes:

Added SD card examples to more/sd/:
- change_directory.cpp
- delete_file.cpp
- get_disk_info.cpp
- list_directory.cpp
- print_working_directory.cpp
- read_file.cpp
Removed dependency to symbol pow in c-r_speed_test.c. pow was not available on some older Linux distributions.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-03-27-beta.zip
$ cd C_C++_LJM_2019-03-27
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

Download C_C++_LJM_2019-03-27-beta.zip

03/27/2019

Beta

Details

Updated for LJM 1.2000.

New changes:

Added SD card examples to more/sd/:
- change_directory.cpp
- delete_file.cpp
- get_disk_info.cpp
- list_directory.cpp
- print_working_directory.cpp
- read_file.cpp
Removed dependency to symbol pow in c-r_speed_test.c. pow was not available on some older Linux distributions.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-03-27-beta.zip
$ cd C_C++_LJM_2019-03-27
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

Download C_C++_LJM_2019-03-27_beta.zip

03/27/2019

Beta

Details

Updated for LJM 1.2000.

New changes:

Added SD card examples to more/sd/:
- change_directory.cpp
- delete_file.cpp
- get_disk_info.cpp
- list_directory.cpp
- print_working_directory.cpp
- read_file.cpp
Removed dependency to symbol pow in c-r_speed_test.c. pow was not available on some older Linux distributions.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-03-27_beta.zip
$ cd C_C++_LJM_2019-03-27
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

Download C_C++_LJM_2019-02-20.zip

02/20/2019

Release

Details

Updated for LJM 1.2000.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2019-02-20.zip
$ cd C_C++_LJM_2019-02-20
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

C_C++_LJM_2019-02-20_beta.zip

Download C_C++_LJM_2019-02-20_beta.zip

02/20/2019

Beta

Details

C_C++_LJM_2018-10-02.zip

Download C_C++_LJM_2018-10-02.zip

10/02/2018

Release

Details

Updated for LJM 1.1900.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2018-10-02.zip
$ cd C_C++_LJM_2018-10-02
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

C_C++_LJM_2018-01-05.zip

Download C_C++_LJM_2018-01-05.zip

01/05/2018

Release

Details

Updated for LJM 1.1700.

Windows:

Newer versions of Visual Studio work with these .sln and .vcproj files, though you will need to run the automatic upgrade process when opening them.

For Visual Studio 2017, you may get the following error:

Error C1083 Cannot open include file: 'stdio.h': No such file or directory

In this case, you need to switch the project SDK version from 8.1 to 10:

Open the Properties window for the project (e.g. in the Solution Explorer, right click on the project - not the solution)
Change Configuration Properties -> General -> Target Platform Version to something like 10.0.14393.0

Mac/Linux:

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux, you may need to apply executable permissions:

$ tar zxvf C_C++_LJM_2018-01-05.zip
$ cd C_C++_LJM_2018-01-05
$ chmod a+x make_all.sh basic/make.sh more/*/make.sh scons-local-2.5.1/scons.py

C_C++_LJM_2017-02-01.zip

Download C_C++_LJM_2017-02-01.zip

02/01/2017

Release

Details

Updated for LJM 1.1405.

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux:

$ tar zxvf C_C++_LJM_2017-02-01.zip
$ cd C_C++_LJM_2017-02-01
$ chmod a+x examples/make*.sh examples/*/make.sh scons-local-2.1.0/scons.py

C_C++_LJM_2017-01-11.zip

Download C_C++_LJM_2017-01-11.zip

01/11/2017

Release

Details

Updated for LJM 1.1404.

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux:

$ tar zxvf C_C++_LJM_2017-01-11.zip
$ cd C_C++_LJM_2017-01-11
$ chmod a+x examples/make*.sh examples/*/make.sh scons-local-2.1.0/scons.py

C_C++_LJM_2016-08-10.zip

Download C_C++_LJM_2016-08-10.zip

08/10/2016

Release

Details

Updated for LJM 1.1301.

On Mac/Linux the .zip format, unfortunately, removes the execution permissions from the build scripts. To use the examples on Mac/Linux:

$ tar zxvf C_C++_LJM_2016-08-10.zip
$ cd C_C++_LJM_2016-08-10
$ chmod a+x examples/make*.sh examples/*/make.sh scons-local-2.1.0/scons.py

C_C++_LJM_2016-06-29.zip

Download C_C++_LJM_2016-06-29.zip

06/29/2016

Release

Details

Updated for LJM 1.1301

C_C++_LJM_2016-05-13.zip

Download C_C++_LJM_2016-05-13.zip

05/13/2016

Release

Details

Updated for LJM 1.1200

C-C++-LJM-1.1100-examples-2016-04-18.zip

Download C-C++-LJM-1.1100-examples-2016-04-18.zip

04/18/2016

Release

Details

Updated for LJM 1.1100

C-C++-LJM-1.0701-examples-2014-07-11.zip

Download C-C++-LJM-1.0701-examples-2014-07-11.zip

07/11/2014

Release

Details

Updated for LJM 1.0701

LJM C/C++ Examples Top (Referenceable)

Prerequisites

LabJack T7 or T4
LJM Library - Install the LJM Library
C/C++ Compiler - We use Microsoft Visual Studio on Windows and gcc on macOS and Linux.
Operating system - Windows, macOS, or Linux.

Instructions

Go to the T4 or T7 Quickstart Tutorial and follow the steps to install LabJack software and confirm basic operation.
Download/extract the .zip file attached at the top of this page.
Navigate to the extracted LabJackM folder.
Open and run .c/.cpp source files using your code editor of choice.

LJM Examples Where Is An Example To Do XYZ (Referencable)

With the LJM library, pretty much everything you might want to do with a device is accomplished by writing and/or reading some registers. Look at the device's datasheet (T7 or T4) or the Modbus Map to determine what registers you need to write and read, then use eWriteName (or eWriteNames) to write the desired registers and eReadName (or eReadNames) to read the desired registers. The following examples in the Basic folder are a great place to start:

LJM_eWriteName Example
LJM_eWriteNames Example
LJM_eReadName Example
LJM_eReadNames Example
Write Read Loop with Config

Where is an example to do XYZ?

You will find lots of examples in this archive, but there is not an example for everything the LabJack can do. The reason for this stems from the "Overview" section above. Most operations simply involve writing and reading different registers, so you really just need examples that show you how to write and read any register. If we had examples for every operation, they would just be copies of the example "Write Read Loop with Config" with different registers. The typical workflow to do almost anything beside stream is:

Look at the T-series Datasheet or the Modbus Map to determine what registers you need to write and read.
Use the Register Matrix in Kipling to test writing and reading your desired registers and confirm you see what you expect to see. This step is optional and not always applicable.
Use eWriteName (or eWriteNames) to write the desired registers and eReadName (or eReadNames) to read the desired registers. Or just use "Write Read Loop with Config", which provides the basic structure used by many user applications.

Stream mode and other operations that don't fit in "Write Read Loop with Config" will usually have specific examples, and if something seems to be missing let us know.

LJM C/C++ Examples Bottom (Referenceable)

Compiling

To compile a C or C++ program that uses LJM see the compilation instructions, which include instructions for compiling programs including:

General instructions
Visual Studio instructions
Using included make.sh build scripts
Using Xcode

Code Snippet

#include <stdio.h>
#include <LabJackM.h>

#include "LJM_Utilities.h"
// Available in the C/C++ examples download. Provides the ErrorCheck function.

int main()
{
    int err, handle;
    double value = 0;

    const char * NAME = {"SERIAL_NUMBER"};

    // Open first found LabJack
    err = LJM_Open(LJM_dtANY, LJM_ctANY, "LJM_idANY", &handle);
    ErrorCheck(err, "LJM_Open");

    // Call LJM_eReadName to read the serial number from the LabJack.
    err = LJM_eReadName(handle, NAME, &value);
    ErrorCheck(err, "LJM_eReadName");

    printf("eReadName result:\n");
    printf("    %s = %f\n", NAME, value);

    // Close device handle
    err = LJM_Close(handle);
    ErrorCheck(err, "LJM_Close");

    return LJME_NOERROR;
}

File list

C_C++_LJM_2019-03-27.zip contains:

README
scons-local-2.5.1/scons.py (as well as SConstruct files for each example folder)
CHANGES.txt
LabJackMModbusMap.h
LJM_StreamUtilities.h
LJM_Utilities.h
make_all.sh
basic\eAddresses.c
basic\eAddresses.exe
basic\eNames.c
basic\eNames.exe
basic\eReadAddress.c
basic\eReadAddress.exe
basic\eReadAddresses.c
basic\eReadAddresses.exe
basic\eReadName.c
basic\eReadName.exe
basic\eReadNames.c
basic\eReadNames.exe
basic\eWriteAddress.c
basic\eWriteAddress.exe
basic\eWriteAddresses.c
basic\eWriteAddresses.exe
basic\eWriteName.c
basic\eWriteName.exe
basic\eWriteNames.c
basic\eWriteNames.exe
basic\make.sh
basic\write_read_loop_with_config.c
basic\write_read_loop_with_config.exe
more\1-wire\1-wire.c
more\1-wire\1-wire.exe
more\1-wire\make.sh
more\ain\dual_ain_loop.c
more\ain\dual_ain_loop.exe
more\ain\make.sh
more\ain\single_ain.c
more\ain\single_ain.exe
more\ain\single_ain_with_config.c
more\ain\single_ain_with_config.exe
more\asynch\make.sh
more\asynch\uart_loopback_test.c
more\asynch\uart_loopback_test.exe
more\config\make.sh
more\config\read_config.c
more\config\read_config.exe
more\config\read_device_name_string.c
more\config\read_device_name_string.exe
more\config\write_device_name_string.c
more\config\write_device_name_string.exe
more\config\write_power_config.c
more\config\write_power_config.exe
more\dio\make.sh
more\dio\single_dio_read.c
more\dio\single_dio_read.exe
more\dio\single_dio_write.c
more\dio\single_dio_write.exe
more\dio_ef\dio_ef_config_1_pwm_and_1_counter.c
more\dio_ef\dio_ef_config_1_pwm_and_1_counter.exe
more\dio_ef\make.sh
more\ethernet\make.sh
more\ethernet\read_ethernet_config.c
more\ethernet\read_ethernet_config.exe
more\ethernet\read_ethernet_mac.c
more\ethernet\read_ethernet_mac.exe
more\ethernet\write_ethernet_config.c
more\ethernet\write_ethernet_config.exe
more\i2c\i2c_eeprom.c
more\i2c\i2c_eeprom.exe
more\i2c\make.sh
more\list_all\list_all.c
more\list_all\list_all.exe
more\list_all\list_all_extended.c
more\list_all\list_all_extended.exe
more\list_all\make.sh
more\sd\change_directory.cpp
more\sd\change_directory.exe
more\sd\delete_file.cpp
more\sd\delete_file.exe
more\sd\get_disk_info.cpp
more\sd\get_disk_info.exe
more\sd\list_directory.cpp
more\sd\list_directory.exe
more\sd\make.sh
more\sd\print_working_directory.cpp
more\sd\print_working_directory.exe
more\sd\read_file.cpp
more\sd\read_file.exe
more\sd\sd_util.hpp
more\spi\make.sh
more\spi\spi.c
more\spi\spi.exe
more\stream\make.sh
more\stream\stream_basic.c
more\stream\stream_basic.exe
more\stream\stream_basic_with_stream_out.c
more\stream\stream_basic_with_stream_out.exe
more\stream\stream_burst.c
more\stream\stream_burst.exe
more\stream\stream_callback.c
more\stream\stream_callback.exe
more\stream\stream_external_clock.c
more\stream\stream_external_clock.exe
more\stream\stream_out_only.c
more\stream\stream_out_only.exe
more\stream\stream_out_update.c
more\stream\stream_out_update.exe
more\stream\stream_sequential_ain.c
more\stream\stream_sequential_ain.exe
more\stream\stream_triggered.c
more\stream\stream_triggered.exe
more\testing\auto_reconnect_test.c
more\testing\auto_reconnect_test.exe
more\testing\c-r_speed_test.c
more\testing\c-r_speed_test.exe
more\testing\externally_clocked_stream_test.c
more\testing\externally_clocked_stream_test.exe
more\testing\make.sh
more\testing\stream_burst_test.c
more\testing\stream_burst_test.exe
more\testing\system_reboot_test.c
more\testing\system_reboot_test.exe
more\testing\write_read_loop_with_config_speed_test_eNames.c
more\testing\write_read_loop_with_config_speed_test_eNames.exe
more\utilities\device_info.c
more\utilities\device_info.exe
more\utilities\error.c
more\utilities\error.exe
more\utilities\lua_script_basic.c
more\utilities\lua_script_basic.exe
more\utilities\make.sh
more\utilities\names_to_addresses.c
more\utilities\names_to_addresses.exe
more\utilities\raw_bytes.c
more\utilities\raw_bytes.exe
more\utilities\read_cal.c
more\utilities\read_cal.exe
more\utilities\read_ljm_config.c
more\utilities\read_ljm_config.exe
more\utilities\set_timeout.cpp
more\utilities\set_timeout.exe
more\utilities\stepwise_feedback.c
more\utilities\stepwise_feedback.exe
more\utilities\t7_tcp_configure.c
more\utilities\t7_tcp_configure.exe
more\utilities\thermocouple_example.c
more\utilities\thermocouple_example.exe
more\utilities\dynamic_runtime_linking\windows_dynamic_runtime_linking.c
more\utilities\dynamic_runtime_linking\windows_dynamic_runtime_linking.exe
more\utilities\dynamic_runtime_linking\windows_dynamic_runtime_linking.sln
more\utilities\dynamic_runtime_linking\windows_dynamic_runtime_linking.vcproj
more\watchdog\make.sh
more\watchdog\read_watchdog_config.c
more\watchdog\read_watchdog_config.exe
more\watchdog\write_watchdog_config.c
more\watchdog\write_watchdog_config.exe
more\wifi\make.sh
more\wifi\read_wifi_config.c
more\wifi\read_wifi_config.exe
more\wifi\read_wifi_mac.c
more\wifi\read_wifi_mac.exe
more\wifi\read_wifi_rssi.c
more\wifi\read_wifi_rssi.exe
more\wifi\write_wifi_config.c
more\wifi\write_wifi_config.exe
visual_studio_2008\basic\eAddresses\eAddresses.sln
visual_studio_2008\basic\eAddresses\eAddresses.vcproj
visual_studio_2008\basic\eNames\eNames.sln
visual_studio_2008\basic\eNames\eNames.vcproj
visual_studio_2008\basic\eReadAddress\eReadAddress.sln
visual_studio_2008\basic\eReadAddress\eReadAddress.vcproj
visual_studio_2008\basic\eReadAddresses\eReadAddresses.sln
visual_studio_2008\basic\eReadAddresses\eReadAddresses.vcproj
visual_studio_2008\basic\eReadName\eReadName.sln
visual_studio_2008\basic\eReadName\eReadName.vcproj
visual_studio_2008\basic\eReadNames\eReadNames.sln
visual_studio_2008\basic\eReadNames\eReadNames.vcproj
visual_studio_2008\basic\eWriteAddress\eWriteAddress.sln
visual_studio_2008\basic\eWriteAddress\eWriteAddress.vcproj
visual_studio_2008\basic\eWriteAddresses\eWriteAddresses.sln
visual_studio_2008\basic\eWriteAddresses\eWriteAddresses.vcproj
visual_studio_2008\basic\eWriteName\eWriteName.sln
visual_studio_2008\basic\eWriteName\eWriteName.vcproj
visual_studio_2008\basic\eWriteNames\eWriteNames.sln
visual_studio_2008\basic\eWriteNames\eWriteNames.vcproj
visual_studio_2008\basic\write_read_loop_with_config\write_read_loop_with_config.sln
visual_studio_2008\basic\write_read_loop_with_config\write_read_loop_with_config.vcproj
visual_studio_2008\more\1-wire\1-wire\1-wire.sln
visual_studio_2008\more\1-wire\1-wire\1-wire.vcproj
visual_studio_2008\more\ain\dual_ain_loop\dual_ain_loop.sln
visual_studio_2008\more\ain\dual_ain_loop\dual_ain_loop.vcproj
visual_studio_2008\more\ain\single_ain\single_ain.sln
visual_studio_2008\more\ain\single_ain\single_ain.vcproj
visual_studio_2008\more\ain\single_ain_with_config\single_ain_with_config.sln
visual_studio_2008\more\ain\single_ain_with_config\single_ain_with_config.vcproj
visual_studio_2008\more\asynch\uart_loopback_test\uart_loopback_test.sln
visual_studio_2008\more\asynch\uart_loopback_test\uart_loopback_test.vcproj
visual_studio_2008\more\config\read_config\read_config.sln
visual_studio_2008\more\config\read_config\read_config.vcproj
visual_studio_2008\more\config\read_device_name_string\read_device_name_string.sln
visual_studio_2008\more\config\read_device_name_string\read_device_name_string.vcproj
visual_studio_2008\more\config\write_device_name_string\write_device_name_string.sln
visual_studio_2008\more\config\write_device_name_string\write_device_name_string.vcproj
visual_studio_2008\more\config\write_power_config\write_power_config.sln
visual_studio_2008\more\config\write_power_config\write_power_config.vcproj
visual_studio_2008\more\dio\single_dio_read\single_dio_read.sln
visual_studio_2008\more\dio\single_dio_read\single_dio_read.vcproj
visual_studio_2008\more\dio\single_dio_write\single_dio_write.sln
visual_studio_2008\more\dio\single_dio_write\single_dio_write.vcproj
visual_studio_2008\more\dio_ef\dio_ef_config_1_pwm_and_1_counter\dio_ef_config_1_pwm_and_1_counter.sln
visual_studio_2008\more\dio_ef\dio_ef_config_1_pwm_and_1_counter\dio_ef_config_1_pwm_and_1_counter.vcproj
visual_studio_2008\more\ethernet\read_ethernet_config\read_ethernet_config.sln
visual_studio_2008\more\ethernet\read_ethernet_config\read_ethernet_config.vcproj
visual_studio_2008\more\ethernet\read_ethernet_mac\read_ethernet_mac.sln
visual_studio_2008\more\ethernet\read_ethernet_mac\read_ethernet_mac.vcproj
visual_studio_2008\more\ethernet\write_ethernet_config\write_ethernet_config.sln
visual_studio_2008\more\ethernet\write_ethernet_config\write_ethernet_config.vcproj
visual_studio_2008\more\i2c\i2c_eeprom\i2c_eeprom.sln
visual_studio_2008\more\i2c\i2c_eeprom\i2c_eeprom.vcproj
visual_studio_2008\more\list_all\list_all\list_all.sln
visual_studio_2008\more\list_all\list_all\list_all.vcproj
visual_studio_2008\more\list_all\list_all_extended\list_all_extended.sln
visual_studio_2008\more\list_all\list_all_extended\list_all_extended.vcproj
visual_studio_2008\more\sd\change_directory\change_directory.sln
visual_studio_2008\more\sd\change_directory\change_directory.vcproj
visual_studio_2008\more\sd\delete_file\delete_file.sln
visual_studio_2008\more\sd\delete_file\delete_file.vcproj
visual_studio_2008\more\sd\get_disk_info\get_disk_info.sln
visual_studio_2008\more\sd\get_disk_info\get_disk_info.vcproj
visual_studio_2008\more\sd\list_directory\list_directory.sln
visual_studio_2008\more\sd\list_directory\list_directory.vcproj
visual_studio_2008\more\sd\print_working_directory\print_working_directory.sln
visual_studio_2008\more\sd\print_working_directory\print_working_directory.vcproj
visual_studio_2008\more\sd\read_file\read_file.sln
visual_studio_2008\more\sd\read_file\read_file.vcproj
visual_studio_2008\more\spi\spi\spi.sln
visual_studio_2008\more\spi\spi\spi.vcproj
visual_studio_2008\more\stream\stream_basic\stream_basic.sln
visual_studio_2008\more\stream\stream_basic\stream_basic.vcproj
visual_studio_2008\more\stream\stream_basic_with_stream_out\stream_basic_with_stream_out.sln
visual_studio_2008\more\stream\stream_basic_with_stream_out\stream_basic_with_stream_out.vcproj
visual_studio_2008\more\stream\stream_burst\stream_burst.sln
visual_studio_2008\more\stream\stream_burst\stream_burst.vcproj
visual_studio_2008\more\stream\stream_callback\stream_callback.sln
visual_studio_2008\more\stream\stream_callback\stream_callback.vcproj
visual_studio_2008\more\stream\stream_external_clock\stream_external_clock.sln
visual_studio_2008\more\stream\stream_external_clock\stream_external_clock.vcproj
visual_studio_2008\more\stream\stream_out_only\stream_out_only.sln
visual_studio_2008\more\stream\stream_out_only\stream_out_only.vcproj
visual_studio_2008\more\stream\stream_out_update\stream_out_update.sln
visual_studio_2008\more\stream\stream_out_update\stream_out_update.vcproj
visual_studio_2008\more\stream\stream_sequential_ain\stream_sequential_ain.sln
visual_studio_2008\more\stream\stream_sequential_ain\stream_sequential_ain.vcproj
visual_studio_2008\more\stream\stream_triggered\stream_triggered.sln
visual_studio_2008\more\stream\stream_triggered\stream_triggered.vcproj
visual_studio_2008\more\testing\auto_reconnect_test\auto_reconnect_test.sln
visual_studio_2008\more\testing\auto_reconnect_test\auto_reconnect_test.vcproj
visual_studio_2008\more\testing\c-r_speed_test\c-r_speed_test.sln
visual_studio_2008\more\testing\c-r_speed_test\c-r_speed_test.vcproj
visual_studio_2008\more\testing\externally_clocked_stream_test\externally_clocked_stream_test.sln
visual_studio_2008\more\testing\externally_clocked_stream_test\externally_clocked_stream_test.vcproj
visual_studio_2008\more\testing\stream_burst_test\stream_burst_test.sln
visual_studio_2008\more\testing\stream_burst_test\stream_burst_test.vcproj
visual_studio_2008\more\testing\system_reboot_test\system_reboot_test.sln
visual_studio_2008\more\testing\system_reboot_test\system_reboot_test.vcproj
visual_studio_2008\more\testing\write_read_loop_with_config_speed_test_eNames\write_read_loop_with_config_speed_test_eNames.sln
visual_studio_2008\more\testing\write_read_loop_with_config_speed_test_eNames\write_read_loop_with_config_speed_test_eNames.vcproj
visual_studio_2008\more\utilities\device_info\device_info.sln
visual_studio_2008\more\utilities\device_info\device_info.vcproj
visual_studio_2008\more\utilities\dynamic_runtime_linking\windows_dynamic_runtime_linking\windows_dynamic_runtime_linking.sln
visual_studio_2008\more\utilities\dynamic_runtime_linking\windows_dynamic_runtime_linking\windows_dynamic_runtime_linking.vcproj
visual_studio_2008\more\utilities\error\error.sln
visual_studio_2008\more\utilities\error\error.vcproj
visual_studio_2008\more\utilities\lua_script_basic\lua_script_basic.sln
visual_studio_2008\more\utilities\lua_script_basic\lua_script_basic.vcproj
visual_studio_2008\more\utilities\names_to_addresses\names_to_addresses.sln
visual_studio_2008\more\utilities\names_to_addresses\names_to_addresses.vcproj
visual_studio_2008\more\utilities\raw_bytes\raw_bytes.sln
visual_studio_2008\more\utilities\raw_bytes\raw_bytes.vcproj
visual_studio_2008\more\utilities\read_cal\read_cal.sln
visual_studio_2008\more\utilities\read_cal\read_cal.vcproj
visual_studio_2008\more\utilities\read_ljm_config\read_ljm_config.sln
visual_studio_2008\more\utilities\read_ljm_config\read_ljm_config.vcproj
visual_studio_2008\more\utilities\set_timeout\set_timeout.sln
visual_studio_2008\more\utilities\set_timeout\set_timeout.vcproj
visual_studio_2008\more\utilities\stepwise_feedback\stepwise_feedback.sln
visual_studio_2008\more\utilities\stepwise_feedback\stepwise_feedback.vcproj
visual_studio_2008\more\utilities\t7_tcp_configure\t7_tcp_configure.sln
visual_studio_2008\more\utilities\t7_tcp_configure\t7_tcp_configure.vcproj
visual_studio_2008\more\utilities\thermocouple_example\thermocouple_example.sln
visual_studio_2008\more\utilities\thermocouple_example\thermocouple_example.vcproj
visual_studio_2008\more\watchdog\read_watchdog_config\read_watchdog_config.sln
visual_studio_2008\more\watchdog\read_watchdog_config\read_watchdog_config.vcproj
visual_studio_2008\more\watchdog\write_watchdog_config\write_watchdog_config.sln
visual_studio_2008\more\watchdog\write_watchdog_config\write_watchdog_config.vcproj
visual_studio_2008\more\wifi\read_wifi_config\read_wifi_config.sln
visual_studio_2008\more\wifi\read_wifi_config\read_wifi_config.vcproj
visual_studio_2008\more\wifi\read_wifi_mac\read_wifi_mac.sln
visual_studio_2008\more\wifi\read_wifi_mac\read_wifi_mac.vcproj
visual_studio_2008\more\wifi\read_wifi_rssi\read_wifi_rssi.sln
visual_studio_2008\more\wifi\read_wifi_rssi\read_wifi_rssi.vcproj
visual_studio_2008\more\wifi\write_wifi_config\write_wifi_config.sln
visual_studio_2008\more\wifi\write_wifi_config\write_wifi_config.vcproj
xcode\basic\write_read_loop_with_config\write_read_loop_with_config.xcodeproj
xcode\basic\write_read_loop_with_config\write_read_loop_with_config.xcodeproj\project.pbxproj

8 comments

Submitted by TFox (not verified) on Thu, 09/11/2014 - 18:42

I am new to Visual Studio and

I am new to Visual Studio and am so far unable to link any programs provided from the examples. Can you provide some direction on how exactly

to reference the header files and libraries in Visual Studio?

Submitted by LabJack Support (not verified) on Mon, 09/15/2014 - 12:35

The examples downloads on

The examples downloads on this page contain example .sln and .vcproj files in the visual_studio_2008 folder, so you could look at those files for Visual Studio 9 examples.

More generally, here are some Visual Studio Configuration Properties that are necessary for LJM.

C/C++:

Additional Include Directories: $(ProgramFiles)\LabJack\Drivers
Calling Convention: __cdecl (/Gd)

Linker:

Additional Library Directories: $(ProgramFiles)\LabJack\Drivers
Additional Dependencies: LabJackM.lib

Submitted by LabJack Support (not verified) on Wed, 06/03/2015 - 10:36

Looks like an issue with

Looks like an issue with linking to the LJM library. Just for a quick test, you could try opening one of the projects/solutions in the download's visual_studio_2008 folder and see if they compile.

As for the errors you are getting, make sure your linker settings look like:

Linker:

Additional Library Directories: $(ProgramFiles)\LabJack\Drivers
Additional Dependencies: LabJackM.lib

If you are compiling a 64-bit application, change the "Additional Library Directories" to "$(ProgramFiles)\LabJack\Drivers\64bit" instead. If the proper LabJackM.lib file isn't used for linking the compiler will not find the LJM functions/symbols.

Submitted by BrentC (not verified) on Wed, 06/03/2015 - 13:09

The examples in the

The examples in the visual_studio_2008 folder compile with no issues. My linker settings are identical to those above. I am attempting to compile for Win32.

Submitted by LabJack Support (not verified) on Wed, 06/03/2015 - 13:48

I would recommend going

I would recommend going through Microsoft's LNK2019 error guide, if you haven't already:

https://msdn.microsoft.com/en-us/library/799kze2z.aspx

In particular, it may be helpful to use the /VERBOSE flag to make sure LabJackM.lib is being linked. Also, the stackoverflow it mentions may be generally helpful to you.

You can also try adding LabJackM.lib to your project or otherwise ensuring that LabJackM.lib is where you think it is.

Submitted by BrentC (not verified) on Mon, 06/08/2015 - 14:06

SOLUTION: In the Visual

SOLUTION:

In the Visual Studio 2013 project properties dialog, change C/C++ > Preprocessor > Preprocessor Definitions

from the default: _MBCS;%(PreprocessorDefinitions)

to: WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)

The example code snippet will now compile and run.

Note: Add the statement WaitForUserIfWindows(); just above the return LJME_NOERROR; statement to keep the console window open for inspection after the program has finished execution.

Submitted by LabJack Support (not verified) on Mon, 06/08/2015 - 14:14

Thanks for posting

Thanks for posting this!

Also, WaitForUserIfWindows is defined in LJM_Utilities.h, for anyone who might be looking at this in the future.

Submitted by BrentC (not verified) on Wed, 06/03/2015 - 13:14

I can compile the code

I can compile the code snippet above if I paste it into the .c file of an existing Visual Studio example project, so my problem must be due to incorrect settings somewhere...