Need your opinion on CPLD/FPGA vs. uP

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david119

Joined: 13 Mar 2006
Posts: 23
Helped: 1

23 Mar 2006 6:10 Need your opinion on CPLD/FPGA vs. uP

Hi everyone,

I'm thinking about including an LCD into my next project and would like your opinions. I have two general questions.

1) Can you use a CPLD/FPGA device to drive an LCD display? It seems that most choose to use uP's. What are the advantages over the other?

2) My second question is should I choose a character or graphic LCD? I don't have any experience with either. I imagine that a graphic LCD is going to be a little more difficult to work with, but the added custom look will look cooler.

Any opinions, tutorials, web links, ect. would be greatly appreciated

Thanks in advance

vivek

Joined: 19 May 2005
Posts: 69
Helped: 9

23 Mar 2006 9:08 Re: Need your opinion on CPLD/FPGA vs. uP

david119 wrote:

1) Can you use a CPLD/FPGA device to drive an LCD display? It seems that most choose to use uP's. What are the advantages over the other?

Yes u can. Check this link : http://www.fpga4fun.com/TextLCDmodule.html

As for advantages..... hmmm cant think of anything specific. May be using a uP or uC you can do it in shorter time and is easier.

for graphic lcd with fpga see here http://www.fpga4fun.com/GraphicLCDpanel.html

Iouri

Joined: 17 Aug 2005
Posts: 687
Helped: 79

23 Mar 2006 17:37 Need your opinion on CPLD/FPGA vs. uP

What is project?? for example you can use Epson controller to drive LCD display also.developing FPGA will take time and effort, using external chip might be easy..

Good luck

david119

Joined: 13 Mar 2006
Posts: 23
Helped: 1

24 Mar 2006 5:32 Re: Need your opinion on CPLD/FPGA vs. uP

Thanks for the info so far guys!

My project is going to record some timed events. So basically it is going to display numerals (in a time format) with characters to label each event.

Iouri,
How would an Epson controller work or any for that matter?

david119

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Iouri

Joined: 17 Aug 2005
Posts: 687
Helped: 79

24 Mar 2006 13:44 Need your opinion on CPLD/FPGA vs. uP

Epson controller it just a graphic LCD controller, so you can hook to CPU. look at the link bellow
http://www.eea.epson.com/go/Prod_Admin/Categories/EEA/IC/ASSP/Display_IC/displayCategory

fahadislam2006

Joined: 09 Jan 2006
Posts: 51
Helped: 1
Location: Sweden

25 Mar 2006 11:02 Re: Need your opinion on CPLD/FPGA vs. uP

I have worked on both up and fpga ... but i feel for that like small task it is better to go for up instead of fpga ... but if u have better experience on fpga then obviously u would be clear that it is easier on fpga ...