Digital OscilloScope Working

[Ashkar]

Hello All,

I want to ask you people that how does a FPGA based Oscilloscope works ?

Like an Entry level DSO Might Have a LVDS o/p ADC Which is connected to a FPGA(With INternal Ram ) And a LCD Screen with a MCU.
Am I right?

 

[mrflibble]

It can contain anything you design it to contain. ;-) Google "dso digital oscilloscope fpga". Or take a look at for example teardown videos of Rigol oscilloscopes. That should help get you started.

 

[Ashkar]

Ok I got a Nice Teardown on EEVBLOG by David,It helped a Lot.
So I think If I might have a Spartan 3E FPGA and a LVDS based ADC(Pipelined one)Then I would get a high sampling rate based setup.
But I am Confused by the fact that how doed FPGA interfere in ADC LVDS Communication and data entry into fpga.
How does these things really work.
Any literature on a real Digital DSO would be welcome.

 

[mrflibble]

Googling "Spartan 3E lvds" would be a good idea then. Read the xilinx docs on lvds for your chosen fpga.

 

[Ashkar]

Thank,
So I will be interfacing ADC via FPGA using LVDS protocol.Thats Fine.
So What type of protocol Should I take from FPGA to get the data into a MCU and Display it via A LCD

 

[mrflibble]

fpga <==> mcu; uart, i2c, spi, take your pick. Make it regular boring UART, that's probably easiest.

And lcd: read the lcd datasheet and you will know how to interface to the lcd. There's example C code out there for the more popular mcu's, but you will have to google around a bit to find it for your mcu and lcd module.

 

[Ashkar]

Fine,I get that easily.
So what do I do to connect LVDS via FPGA and what type of methodology should be implemented in doing so?

 

[mrflibble]

Good to hear you get that easily. You can easily get the answer to the above question by employing this search engine called google. Seriously. I could do that now and find the proper link in 10 seconds or less. But I don't want to deprive you of the learning opportunity. So off you go ... the brave new world of using a search engine on your own, it awaits you!

Good luck!

 

[Ashkar]

Good :-D .