Re: Triggering PCIMIO 16 E4

From: Rafael Velez <velezcuartas_at_epm.net.co> · Date: Thu, 18 Jul 2002 15:57:18 -0500

David Schleef wrote:

>On Thu, Jul 18, 2002 at 11:14:25AM -0500, Rafael Velez wrote:
>  
>
>>I'm working in a PCIMIO 16 E4, the cmd.c example seems to work well but 
>>when i connect a signal, the program shows wrong signals, the question 
>>is what trigger is disabled in ni_pcimio.o when DMA is enabled???
>>    
>>
>
>Actually, the documentation is slightly inaccurate.  Notification
>at end-of-scan events (i.e., TRIG_WAKE_EOS) does not work, but
>otherwise, everything is the same.  The cmd.c demo does not use
>end-of-scan events.
>
>
>
>dave...
>
>
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>  
>
Hi Dave, thanks for the answer i solved,  i'm trying to convert the 
samples in cmd.c to values of voltaje and modify the cmd.c like this 
(only marked whit *):

.....

if(verbose)fprintf(stderr,"read %d %d\n",ret,total);
            for(i=0;i<ret/2;i++){
        *maxdata=comedi_get_maxdata(dev,subdevice,col);
        *rangetype=comedi_get_range(dev,subdevice,i,range);
         *voltaje=comedi_to_phys((lsampl_t)buf[i],rangetype,maxdata);
        *printf("%2.2f   ",voltaje);
                col++;
                if(col==n_chan){
                    printf("\n");
                    col=0;

....

I know that the error must be in comedi_get_range, but i was looking the 
documentation and it says that it work only if de device is closed but 
one argument is device???