Can you help me with ADC reading on de0-nano? Is it necessarily to use ADC-controller when programming FPGA if i don`t want to change something in adc converting? Can I read directly digital values from ADC on input FPGA pin (like I can use 50 Mhz from CLOCK_50 input) in block diagram? whether will work if I choose ADC in System Builder? is it enough of it for ADC work?