NI-DAQ to NI-DAQmx VB6 conversion

[houbo]

Hi,

My old VB6 application was running on PCI-6034 (NI-DAQ platform) and using the following NI function calls (provided by nidaq32.dll😞

AI_VRead

Set_DAQ_Device_Info

AI_Clear

AI_Configure

DAQ_Clear

DAQ_DB_Config

Timeout_Config

DAQ_Config

Select_Signal

DAQ_Rate

DAQ_Start

Get_DAQ_Device_Info

DAQ_VScale

DAQ_DB_Transfer

DAQ_Check

DAQ_DB_HalfReady

GPCTR_Change_Parameter

GPCTR_Control

GPCTR_Config_Buffer

GPCTR_Watch

Get_NI_DAQ_Version

GPCTR_Control

GPCTR_Set_Application

GPCTR_Read_Buffer

I'm now upgrading the system to use a new NI card (NI-USB6341), and I have to change the VB6 application to run on NI-DAQmx platform. I have read thru the NI-DAQmx documentations came with the installation, but I couldn’t find the equivalent functions. Could you please let me know which are the new function calls I can use to replace those listed above? There's no plan to upgrade to VB.NET for now. Thank you!

[JasonWhite]

Without the parameters that would have been passed to those functions it's pretty difficult to say for certain.  NI-DAQ and NI-DAQmx use different programming paradigms and so there isn't a one-to-one correlation with function calls.

Instead of focusing on the previous function calls, you might have more luck trying to first write a detailed description of what your program was doing with the DAQ board.  That would likely translate pretty easily to an example program that could be tweaked to meet your needs.

[houbo]

Hi, Thank you for your reply!

Our old program uses external trigger (counter) to sample the Analog Inputs:

DAQ_Config:     Configured as external trigger (extConv =1)

Select_Signal:   Selected ND_GPCTR0_OUTPUT as trigger signal, i.e. use a counter to trigger the Analog Input reading.

DAQ_Start:        Start Analog Input data acquisition.

May I know in the new nidaqmx.dll, which are the new functions I can use to achieve the same? Thank you!