eDI without setting direction about exodriver HOT 8 CLOSED

Which LabJack device are you using? UE9, U3 or U6?

from exodriver.

Hello,

Sorry. I didn't remember to tell you that.
I'm using U3 & U3 HV

from exodriver.

In the eDI source code, u3.c, starting at line 998 in the eDI function change this chunk of code:

/* Setting up Feedback command to set digital Channel to input and to read from it */
sendDataBuff[0] = 13;  //IOType is BitDirWrite
sendDataBuff[1] = Channel;  //IONumber(bits 0-4) + Direction (bit 7)

sendDataBuff[2] = 10;  //IOType is BitStateRead
sendDataBuff[3] = Channel;  //IONumber

if( ehFeedback(Handle, sendDataBuff, 4, &Errorcode, &ErrorFrame, recDataBuff, 1) < 0 )
    return -1;

to this:

/* Setting up Feedback command to only read from the digital Channel */
sendDataBuff[0] = 10;  //IOType is BitStateRead
sendDataBuff[1] = Channel;  //IONumber

if( ehFeedback(Handle, sendDataBuff, 2, &Errorcode, &ErrorFrame, recDataBuff, 1) < 0 )
    return -1;

This should be the only changes needed, and it will let you read the digital line's state without forcing it to an input. Let me know if this does not work or if you need further help.

from exodriver.

Thanks. I was looking to edit these lines but I can't figure out to what ^^
I'll try ASAP.

from exodriver.

Thanks again. Sorry, didn't remember to send a feedback. It's working like a charm.

I made a new function called "eDI_Passive" for this. You can maybe implement it ? ;-)
I've to do the same thing for the eAIN function. I looked a bit but it seems to be more complicated..

Best regards.

from exodriver.

I am not sure I understand what change in functionality you want with eAIN. In eAIN, you set ConfigIO to a value > 1 (true) if you want the function to force ChannelP and ChannelN to analog inputs, and ConfigIO to 0 if you want the function to only read the AIN channel regardless of current analog input settings. I assume your passive reading would just need to set ConfigIO to 0 unless I am missing something.

from exodriver.

Hello,

Thanks for your interest.
I want to act as a voltmeter (like you did with the digital..)

----------------- Writing (analog) 1.200000 on DAC1
----------------- Reading (analog) DAC1 (get PreviousValue) :1.393065

I want to read value to be 1.2 here.

Here is the reading call :
eAIN_Passive(t->m_device->device, t->m_device->caliInfo, 0, 0, t->m_port, 31, &previousValue, 0, 0, 0, 0, 0, 0)

Thanks.

from exodriver.

After many tweaks, I finally found.

Have to modify the line 860.

if( ehFeedback(Handle, sendDataBuff, 3, &Errorcode, &ErrorFrame, recDataBuff, 2) < 0 )

->
if( ehFeedback(Handle, sendDataBuff, 1, &Errorcode, &ErrorFrame, recDataBuff, 2) < 0 )

Thanks.

from exodriver.