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DAQmxWriteDigitalLines how to understand?

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DAQmxWriteDigitalLines how to understand?

‎08-26-2013 06:40 AM

I have managed to make working port output, but now I need to use only 0,1,2,3,7 lines of port 2 to set there a values not affecting the 4,5,6 lines.

I made a task with assignment:
    DAQmxErrChk(DAQmxCreateDOChan(taskOut, "ioDev/port2/line7",
        "DigitalOut_0", DAQmx_Val_ChanPerLine));
    DAQmxErrChk(DAQmxSetChanAttribute(taskOut, "H1B1.7", DAQmx_DO_InvertLines, 0));

    DAQmxErrChk(DAQmxCreateDOChan(taskOut, "ioDev/port2/line3",
        "DigitalOut_1", DAQmx_Val_ChanPerLine));
    DAQmxErrChk(DAQmxSetChanAttribute(taskOut, "H1B1.3", DAQmx_DO_InvertLines, 0));

    DAQmxErrChk(DAQmxCreateDOChan(taskOut, "ioDev/port2/line2",
        "DigitalOut_2", DAQmx_Val_ChanPerLine));
    DAQmxErrChk(DAQmxSetChanAttribute(taskOut, "H1B1.2", DAQmx_DO_InvertLines, 0));

    DAQmxErrChk(DAQmxCreateDOChan(taskOut, "ioDev/port2/line1",
        "DigitalOut_3", DAQmx_Val_ChanPerLine));
    DAQmxErrChk(DAQmxSetChanAttribute(taskOut, "H1B1.1", DAQmx_DO_InvertLines, 0));

    DAQmxErrChk(DAQmxCreateDOChan(taskOut, "ioDev/port2/line0",
        "DigitalOut_7", DAQmx_Val_ChanPerLine));
    DAQmxErrChk(DAQmxSetChanAttribute(taskOut, "H1B1.0", DAQmx_DO_InvertLines, 0));

in the input of my function I get |uInt8 word|, and I need to make some function to set those 0,1,2,3,7  having as a source that word.

 

How to operate DAQmxWriteDigitalLines,  to set only 0,1,2,3,7 bits of the port with the assignment that I made above.

 

Thank you very much in advance


Chris

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Re: DAQmxWriteDigitalLines how to understand?

‎08-27-2013 03:50 AM

I have even developed it to that version, and it do not work.

int setH1B1(uInt8 word)
{
    int status=1;
    uInt32 samp;
    uInt8       data[8];
    
            // Here NI-DAQ function to set Port 1 B    
                
                TaskHandle line0,line1,line2,line3,line7;
                uInt8 out0,out1,out2,out3,out7;
                
                
                DAQmxErrChk (DAQmxCreateTask("LINE0",&line0));       
                DAQmxErrChk(DAQmxCreateDOChan(line0, "ioDev/port2/line0",
                "DigitalOut_0", DAQmx_Val_ChanPerLine));
                DAQmxErrChk(DAQmxSetChanAttribute(line0, "DigitalOut_0", DAQmx_DO_InvertLines, 1));

                DAQmxErrChk (DAQmxCreateTask("LINE1",&line1));       
                DAQmxErrChk(DAQmxCreateDOChan(line1, "ioDev/port2/line1",
                "DigitalOut_1", DAQmx_Val_ChanPerLine));
                DAQmxErrChk(DAQmxSetChanAttribute(line1, "DigitalOut_1", DAQmx_DO_InvertLines, 1));
                
                DAQmxErrChk (DAQmxCreateTask("LINE2",&line2));       
                DAQmxErrChk(DAQmxCreateDOChan(line2, "ioDev/port2/line2",
                "DigitalOut_2", DAQmx_Val_ChanPerLine));
                DAQmxErrChk(DAQmxSetChanAttribute(line2, "DigitalOut_2", DAQmx_DO_InvertLines, 1));
                
                DAQmxErrChk (DAQmxCreateTask("LINE3",&line3));       
                DAQmxErrChk(DAQmxCreateDOChan(line3, "ioDev/port2/line3",
                "DigitalOut_3", DAQmx_Val_ChanPerLine));
                DAQmxErrChk(DAQmxSetChanAttribute(line3, "DigitalOut_3", DAQmx_DO_InvertLines, 1));
                
                DAQmxErrChk (DAQmxCreateTask("LINE7",&line7));       
                DAQmxErrChk(DAQmxCreateDOChan(line7, "ioDev/port2/line7",
                "DigitalOut_7", DAQmx_Val_ChanPerLine));
                DAQmxErrChk(DAQmxSetChanAttribute(line7, "DigitalOut_7", DAQmx_DO_InvertLines, 1));
                
                    
                    (out0)=(uInt8)(word & 0b00000001)?1:0;
                    (out1)=(uInt8)(word & 0b00000010)?1:0;
                    (out2)=(uInt8)(word & 0b00000100)?1:0;
                    (out3)=(uInt8)(word & 0b00001000)?1:0;
                    (out7)=(uInt8)(word & 0b10000000)?1:0;
                    
                    DAQmxErrChk (DAQmxWriteDigitalLines(line0,1,1,10.0,DAQmx_Val_GroupByChannel,&out0,NULL,NULL));
                    DAQmxErrChk (DAQmxWriteDigitalLines(line1,1,1,10.0,DAQmx_Val_GroupByChannel,&out1,NULL,NULL));
                    DAQmxErrChk (DAQmxWriteDigitalLines(line2,1,1,10.0,DAQmx_Val_GroupByChannel,&out2,NULL,NULL));
                    DAQmxErrChk (DAQmxWriteDigitalLines(line3,1,1,10.0,DAQmx_Val_GroupByChannel,&out3,NULL,NULL));
                    DAQmxErrChk (DAQmxWriteDigitalLines(line7,1,1,10.0,DAQmx_Val_GroupByChannel,&out7,NULL,NULL));
                    
                    
                    DAQmxErrChk (DAQmxStopTask(taskHandleH1B1));
            ErrorDaQ:
                SetWaitCursor(0);
                if( DAQmxFailed(error) )
                    DAQmxGetExtendedErrorInfo(errBuff,2048);
                if( taskHandleH1B1!=0 )
                {
                    DAQmxStopTask(taskHandleH1B1);
                //    DAQmxClearTask(taskHandleH1B1);
                }
                if( DAQmxFailed(error) )MessagePopup("CONNECTION LOST",errBuff);
    return status;
}

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Solution
Accepted by topic author BiedaK

Re: DAQmxWriteDigitalLines how to understand?

‎08-28-2013 12:43 AM

Final WORKING solution.  
Made like by kindergarden student, but solution is fine:

int32 CreateH1B1(void)
{
int32 DAQmxError = DAQmxSuccess;
DAQmxErrChk (DAQmxCreateTask("LINE0",&line0));
DAQmxErrChk(DAQmxCreateDOChan(line0, "ioDev/port2/line0",
"DigitalOut_0", DAQmx_Val_ChanPerLine));

DAQmxErrChk (DAQmxCreateTask("LINE1",&line1));
DAQmxErrChk(DAQmxCreateDOChan(line1, "ioDev/port2/line1",
"DigitalOut_1", DAQmx_Val_ChanPerLine));

DAQmxErrChk (DAQmxCreateTask("LINE2",&line2));
DAQmxErrChk(DAQmxCreateDOChan(line2, "ioDev/port2/line2",
"DigitalOut_2", DAQmx_Val_ChanPerLine));

DAQmxErrChk (DAQmxCreateTask("LINE3",&line3));
DAQmxErrChk(DAQmxCreateDOChan(line3, "ioDev/port2/line3",
"DigitalOut_3", DAQmx_Val_ChanPerLine));

DAQmxErrChk (DAQmxCreateTask("LINE7",&line7));
DAQmxErrChk(DAQmxCreateDOChan(line7, "ioDev/port2/line7",
"DigitalOut_7", DAQmx_Val_ChanPerLine));
Error:
return DAQmxError;
}

 

 

 

 

 

int setH1B1(uInt8 word)
{
int status=1;
uInt32 samp;
uInt8 out0,out1,out2,out3,out7;

(out0)=(uInt8)(word & 0b00000001)?1:0;
(out1)=(uInt8)(word & 0b00000010)?1:0;
(out2)=(uInt8)(word & 0b00000100)?1:0;
(out3)=(uInt8)(word & 0b00001000)?1:0;
(out7)=(uInt8)(word & 0b10000000)?1:0;

DAQmxErrChk (DAQmxStartTask(line0));
DAQmxErrChk (DAQmxStartTask(line1));
DAQmxErrChk (DAQmxStartTask(line2));
DAQmxErrChk (DAQmxStartTask(line3));
DAQmxErrChk (DAQmxStartTask(line7));

DAQmxErrChk (DAQmxWriteDigitalLines(line0,1,1,10.0,DAQmx_Val_GroupByChannel,&out0,NULL,NULL));
DAQmxErrChk (DAQmxWriteDigitalLines(line1,1,1,10.0,DAQmx_Val_GroupByChannel,&out1,NULL,NULL));
DAQmxErrChk (DAQmxWriteDigitalLines(line2,1,1,10.0,DAQmx_Val_GroupByChannel,&out2,NULL,NULL));
DAQmxErrChk (DAQmxWriteDigitalLines(line3,1,1,10.0,DAQmx_Val_GroupByChannel,&out3,NULL,NULL));
DAQmxErrChk (DAQmxWriteDigitalLines(line7,1,1,10.0,DAQmx_Val_GroupByChannel,&out7,NULL,NULL));

DAQmxErrChk (DAQmxStopTask(line0));
DAQmxErrChk (DAQmxStopTask(line1));
DAQmxErrChk (DAQmxStopTask(line2));
DAQmxErrChk (DAQmxStopTask(line3));
DAQmxErrChk (DAQmxStopTask(line7));


ErrorDaQ:
SetWaitCursor(0);
if( DAQmxFailed(error) )
DAQmxGetExtendedErrorInfo(errBuff,2048);

if( DAQmxFailed(error) )MessagePopup("CONNECTION LOST",errBuff);
return status;
}

 

 

Best
Chris

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Re: DAQmxWriteDigitalLines how to understand?

‎05-13-2016 05:51 AM

Hello Friends,

 

I am using Labwindows along with NI-DAQmx. I am creating a GUI with which I have to connect the hardware NI-6528. My question is can I create digital channel with 48 lines and using two different devices (Dev0, Dev1) as shown below:

 

DAQmxCreateDIChan(taskHandle,"Dev1/port0/line0:7,Dev1/port1/line0:7,Dev1/port2/line0:7,Dev2/port0/line0:7,Dev2/port1/line0:7","",DAQmx_Val_ChanForAllLines);

 

Thank you in advance!

 

Best Regards

Raunak

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