Hello, Lenny,
your solution is good, thanks. Here is another question : is it capable of 
synchronizing "multiple" ADC channels at one time ?

I have read ADC driver limitation from TI :
http://processors.wiki.ti.com/index.php/AM335x_ADC_Driver%27s_Guide#ADC_Driver_Limitations

and you said that I can use the ADC in single-acquisition mode. -> Is it 
capable of synchronizing "multiple channels" at one time? (because I need 
to sample three-phase current and voltage signal, so the sum of them are 6 
channels.)

I am not sure "single-acquisition" is limitation of hardware (ADC) 
naturally or just limitation of driver function? 
If I use single-acquisition mode, then I need to consider the effect of 
conversion time between one channel and another channel.


Finally, If I could, please send your sample code for me to my gmail.  
Thanks!

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