How to change output drive mode to open drain for ni-DAQmx

Question

Oscar Bi 2017-1-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/322234-how-to-change-output-drive-mode-to-open-drain-for-ni-daqmx

回答： Sruthi Geetha 2017-1-30

I am trying to change the digital output drive mode on my NI 6003 Daq to open-drain mode. How do I do that with the data acquisition tool box and the NI Daq-mx adapter. I don't see a function or a property for it in the digital output channel I created.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Sruthi Geetha 2017-1-30

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/322234-how-to-change-output-drive-mode-to-open-drain-for-ni-daqmx#answer_252543

The session interface in Data Acquisition Toolbox does not have direct support for changing the drive type of a digital output channel (when supported by the device).

However, it would be possible to implement a workaround calling low-level NI-DAQmx vendor driver functions for accessing this functionality via the undocumented MEX "projection layer" available in Data Acquisition Toolbox.

The NI-DAQmx driver offers the following functions for changing the output drive type property of a certain channel: DAQmxGetDOOutputDriveType DAQmxSetDOOutputDriveType DAQmxResetDOOutputDriveType

These functions are made available to be called directly from MATLAB using a MEX "projection layer" daq.ni.NIDAQmx.DAQmxGetDOOutputDriveType daq.ni.NIDAQmx.DAQmxSetDOOutputDriveType daq.ni.NIDAQmx.DAQmxResetDOOutputDriveType

Refer to the attached example code and wrapper functions, as a usage example for calling these functions and changing the Output Drive Type for a digital output channel: test_DO_DriveType.m NI_DAQmxSetDOOutputDriveType.m NI_DAQmxGetDOOutputDriveType.m