Simultaneous data read from two channels

Hello,

 

I get the same values for chan0 and chan1 while trying to acquire data from
both chans. I am doing the following"

 

For(;;){

Read_chan0();

Sleep(1);

Read_chan1();

}

 

Inside each read_chan() I have the necessary bits to read from chan, i.e,
comedi_data_read(). 

 

To test this I have connected 3VDC supply to chan0 and 5VDC supply to chan1
when I run my program I get 5VDC for chan0 and chan1. If I comment out
either of the read_chan()'s I get the correct voltage for the channel. What
is causing this?

 

Thanks,

 

Eric.