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Instructor
Instructor
129,957 Views
Registered: ‎07-21-2009

README first: Help for new users

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If you are a new user or visitor here, you are probably either casually surfing for interesting and useful information, or you have a frustrating problem which has you stopped in your tracks.

If you are new to Xilinx FPGAs and design tools, these online beginners' tutorials may be particularly helpful.

If you are stopped in your tracks, this post is written for you.  What follows are suggestions to get useful help as quickly as possible, based on thousands of posts in these forums.

1. Read the manual or user guide. Have you read the manual?  Do you know where to find the manual?

Many of the questions are answered with a simple and quick search of the FPGA family datasheet, or a related document. Of course, the first problem is locating the correct document -- there are 100s of them.  For most current software and device families, Xilinx provides a software tool for finding and accessing useful documents.  This tool is called DocNav (Document Navigator), it installs on your PC, and you can download it with this .ZIP file link.

DocNav currently does not include documents for Virtex-4 or Spartan-3 generation devices, which are still very popular.

  • Spartan-3 family docs may be found here
  • Spartan-3a/3an family docs may be found here and here
  • Spartan-3e family docs may be found here

In addition to the DocNav tool and the documentation webpages linked above, you find Xilinx documents of all types by  searching the Xilinx website (see the search tool in the top right corner of the browser window).

 

If you still cannot find the right document to answer your question, we will try to help you.  Generally, finding and reading the document with the answer provides you with more information, more useful information, and important context information -- in less time than waiting for someone to look up the information and post it on the forum for you.

2. Search the forums for similar topics.  And search the web.


For both inexperienced and experienced designers, 90% of the problems and questions have been addressed before.  There is no "Technical FAQ" section for browsing the 100 most frequently asked technical questions.  Instead, you can search the user forums for any keywords which have been included in any and all previous posts and threads.  To narrow down the search, for better results, try using the 'advanced message search' tool.

If your search turns up 2,000 or so matches, and the first 15 do not answer your question, then no-one will fault you for giving up on the search and creating a new thread to post your question.

 

Especially for general questions of technology and concepts, searching the web (using a search engine) can be very productive and informative.


3. Please do not post the same question on multiple forums.


In a panic and desperate for help, you may be tempted to post your problem in several different forums.  This is called cross-posting.

Please do not do this.

  • In this user forum website, new posts in any of the user forums are easily noticed.  Your one post, in a single forum, will be noticed.
  • Duplicate posts clutter the forums with redundant threads, wasting the time of others who are also seeking needed information.
  • When helpful answers and advice are split between multiple threads, participants and readers alike have a hard time making sense of the discussion.


4. Please do not post a new topic or question on someone else's thread -- start a new thread!

 

Interrupting a discussion with an unrelated topic or question is not simply rude, it is considered disrespectful.  This is called hijacking.

  • If your question or topic is unrelated (and unhelpful) to an existing thread, please start a new thread.
  • We want to avoid unreadable threads with 100s of posts which cover topics ranging from power supplies to memory controllers.  Such threads are of no benefit to the users who will follow after you, and a disservice to the creator of the thread who is also seeking help.


5. Students: Copying code is not the same as learning to design.

Students, please do not ask us to complete your class assignments for you.

  • This is not fair to the volunteers in these forums
  • It robs you of the opportunity to learn how to work these problems out for yourself
  • You will likely have a solution which you do not understand and cannot replicate.

You will hopefully have a long design career ahead of you.  Make the most of the opportunity you have to train yourself to think for yourself.

6. "It does not work" is not a question which can be answered.

A very common problem seen in first-time posts is a vague problem description which is missing some (or all) useful detail.  If you want a useful answer, you will need to provide as much detail and context as possible.  Some of the following details might apply to your problem.  If you follow these suggestions, it will save time for everyone.

 

  • If you can, please describe the "big picture" of your problem, and not just the lowest level details.
  • If you get error or warning messages, please copy and paste these messages into your post.
  • If a certain line of your code is flagged as an error, when you post your code, please mark the line which was flagged.
  • Do not forget to specify which FPGA or FPGA family you are targeting

 

  • If you are using a development board, specify which development board, and not just the FPGA part number
  • If you have questions about interfacing to a specific device, include the device part number and links to the device datasheet and product webpage.
  • If you are using an ADC or DAC, keep in mind that there are 1000s of ADCs and DACs.  Please specify part numbers, and datasheet links are also appreciated.
  • Clocks and serial data are common discussion topics.  Do not forget to specify clock frequencies and serial data rates.

 

  • Text is a very limiting form for technical discussions.  Diagrams of all sorts (timing diagrams, flowcharts, state diagrams, block diagrams, etc.) can be very helpful, especially where language barriers must be overcome.
  • Include a summary of what debugging you have already performed.
  • Does the problem show up in simulation, or only in real hardware (the simulation works, the board does not) ?
  • Is the problem consistent, or intermittent?
  • Can the problem be duplicated on more than one board, or does only one board have this failure?
  • Do not just describe what does not work, also describe what does work.  This helps narrow down the possibilities.

The extra time and effort of an adequately detailed problem description will save time and effort in the long run.

A useful and complete description of the design demonstrates that you understand your design and the problem.  Often, taking the time to describe your design will help you to organise your thoughts and your understanding -- and this will help lead you to the source of your problem.

 

Would you like to solve your design problem yourself?  If your design can synthesise, then it can be simulated.  Many logic design problems are discovered in logic simulation, and the Xilinx ISE toolset includes a logic simulator (called ISIM).  If you learn to perform logic simulation, you are also learning to debug your designs on your own.   A logic simulator is available at any time of day or night, and you do not need to wait for an online response.  As a wise colleague wrote: There is something called a simulator that is very useful for determining if the logic is correct.  There is also something called a web forum, which is not a simulator...


7. You are not charged extra fees for comments in your code.

Another common problem is extensive sections of HDL code posted for review, without a description of how the code works or its intended function.  And without comments.  When trying to review source code which we are seeing for the very first time, well-written comments are a huge help.  If the code is not well described or commented, the volunteers may be less likely to spend the time and effort required to figure out what you are trying to implement.

Not only are well-written comments helpful to strangers reading your code, they are also helpful to you, the designer.  They help remind you of details you may forget over time, and they help you to quickly and easily assemble sections of your code into a larger design.

8. Many of the answers and responses in these forums are written by unpaid volunteers.

The volunteers in these forums are freely giving their time and expertise to assist you (and others).  These forums are not intended to replace direct end-user support from Xilinx (the WebCase portal, for example).  So, please do not be too hard on the folks trying to help you.

 

The volunteers are not Xilinx employees, and will not have access to internal Xilinx designs and technical secrets (including future product plans).  You may not be entirely fond of the advice or suggestions you receive, but try to accept such responses in the generous spirit with which they are offered.

 

-- Bob Elkind

SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
1 Solution

Accepted Solutions
Instructor
Instructor
171,328 Views
Registered: ‎07-21-2009

Links to FAQ threads

Jump to solution

NOTE  This post is a continuing work in progress!

 

This post is a list of links to (mostly) existing user forums posts (or threads).  Each linked item is a "reference material" discussion or presentation of some fundamental principle, concept, problem, or issue which is useful to the new user -- or the beginner-level designer.  Over time this list will grow.  Your questions, comments, and suggestions are welcome.

Design Fundamentals:

handling asynchronous inputs  thread#1 thread#2 thread#3
using clock enables (instead of gated clocks or multiple clocks)  thread#1  thread#2

asynchronous design in Xilinx FPGAs  thread#1

an example of signal timing analysis  thread#1

the RESET signal and function in FPGA design      PLD Blog post on RESET     Ken's RESET white paper

 

Design skills:

I'm a beginner with FPGA designs - where do I start?  Online training tutorials and more:  link#1   link#2   thread#1  thread#2   thread#3 

A blog site for non-FPGA types learning about FPGAs

VHDL/Verilog tutorials and book recommendations  thread#1  link#1  thread#2  thread#3

FPGA design book recommendations thread#1

Excellent beginner's guide, using Basys board and VHDL -- but genuinely useful to all beginners.  Highly recommended!

 

Board design:

decoupling capacitor selection and placement  thread#1   thread#2    thread#3

local (on-board) power supply design for dummies
signal termination and transmission line basics  thread#1

FPGA doesn't configure from SPI on power up - configuration needs to be delayed thread#1  thread#2

Advice thread for board designers

 

Common Interfaces and FPGA techniques:

I2C basics link#1 link#2 code examples   I2C spec Rev 4  wiki articles: I2C  SMBus  MDIO  SPD  EDID

SPI (serial peripheral interface) basics  Wiki article  fpga4fun tutorial  the 'other' SPI 

async serial/UART  wiki async serial article  wiki RS-232 article   wiki ASCII codes article   find code   tutorial design

picoblaze-based UART   link #1   link#2

high-speed async serial, using USB-serial bridge  thread#1

Block RAM initialisation  link#1  link#2  link#3  link#4  link#5  link#6  Data2MEM UG6658 (v13.3)

clock forwarding to an output pin   thread #1  thread #2

VCCO connection for unused IO banks  link#1   link#2   link#3   link#4   link#5

pushbutton switch debouncing    description   example solution

an example source-synchronous ADC interface, developed step by step in a forum thread

using PLL to filter clock jitter   thread#1

Design/development of video frame buffer using Spartan-6 MIG DRAM controller (generally interesting thread!)

DDR2/DDR3 DRAM memory interfaces: pin swapping rules   thread #1

Quick and dirty VGA output from FPGA  article#1    article#2

 

Configuration problems:

DONE pin doesn't go HIGH   PLD blog article

How to drive an LED to indicate DONE:  thread

 

Miscellaneous topics:

how to use an oscilloscope
project management link#1
debugging techniques

serial ADC interface methods  link#1
everything you wanted to know about the .mcs PROM file data format   thread#1    AR#476

BGA sockets  thread#1


Development board topics:
care and feeding of ADC, pre-amp, and DAC on many Xilinx development boards link#1  link#2  link#3  link#4

care and feeding of the onboard 2-line character LCDs  link#1  link#2  LCD control example using PicoBlaze

DVI-D vs. HDMI vs. DVI-A vs. VGA    link#1  link#2  wiki EDID article 

FMC link#1 link#2 link#3  link#4

Chrontel CH7301C VGA/DVI video encoder datasheet registers apnote (plus many forum threads discussing this device)

single-player PONG game (Verilog) for Spartan-3A Starter Kit development board  link  youtube video

 

 

ISE toolset

ISE toolset documentation  link#1

"Classic" versions of ISE toolsets for old FPGA families  Table   Answer Record   ISE Classics download page    forum thread

ISE source files types summary   [12.4]   [13.4]    [14.1]

logic trimming in ISE  link#1

Multi-source or multiple drivers error message   thread#1

trouble downloading the software from the Xilinx website?  Try this.

how iMPACT performs indirect programming of configuration memory   link#1

CLOCK_DEDICATED_ROUTE = FALSE error/warning message explained    link#1   link#2

 

Non-ISE toolset

Jim Wu's ADEPT tool - start here.  Excellent report-generation and analysis tool.

 

USB Platform Cable

Trouble installing 13.x, 14.x drivers in Windows 7 machines.  link#1  link#2  link#3

 

Words of wisdom for design students with software backgrounds
These are the first major conceptual hurdles for newbie student designers to overcome:

 

  • The laws of physics do not apply to software, but they apply to real hardware.
  • Verilog, VHDL, and C are imprecise tools for specifying hardware.  You cannot understand how imprecise these tools are unless you first understand the properties and limits of hardware.

 

clock distribution
asynchronous design
power supply sequencing and power supply supervisor
how to read a datasheet (different than Austin's blog entries for reading Xilinx datasheets)
troubleshooting a board which will not self-configure successfully
and, of course, my favourite topic:  circuit board photography.

-- Bob Elkind

SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.

View solution in original post

Tags (1)
52 Replies
Instructor
Instructor
171,329 Views
Registered: ‎07-21-2009

Links to FAQ threads

Jump to solution

NOTE  This post is a continuing work in progress!

 

This post is a list of links to (mostly) existing user forums posts (or threads).  Each linked item is a "reference material" discussion or presentation of some fundamental principle, concept, problem, or issue which is useful to the new user -- or the beginner-level designer.  Over time this list will grow.  Your questions, comments, and suggestions are welcome.

Design Fundamentals:

handling asynchronous inputs  thread#1 thread#2 thread#3
using clock enables (instead of gated clocks or multiple clocks)  thread#1  thread#2

asynchronous design in Xilinx FPGAs  thread#1

an example of signal timing analysis  thread#1

the RESET signal and function in FPGA design      PLD Blog post on RESET     Ken's RESET white paper

 

Design skills:

I'm a beginner with FPGA designs - where do I start?  Online training tutorials and more:  link#1   link#2   thread#1  thread#2   thread#3 

A blog site for non-FPGA types learning about FPGAs

VHDL/Verilog tutorials and book recommendations  thread#1  link#1  thread#2  thread#3

FPGA design book recommendations thread#1

Excellent beginner's guide, using Basys board and VHDL -- but genuinely useful to all beginners.  Highly recommended!

 

Board design:

decoupling capacitor selection and placement  thread#1   thread#2    thread#3

local (on-board) power supply design for dummies
signal termination and transmission line basics  thread#1

FPGA doesn't configure from SPI on power up - configuration needs to be delayed thread#1  thread#2

Advice thread for board designers

 

Common Interfaces and FPGA techniques:

I2C basics link#1 link#2 code examples   I2C spec Rev 4  wiki articles: I2C  SMBus  MDIO  SPD  EDID

SPI (serial peripheral interface) basics  Wiki article  fpga4fun tutorial  the 'other' SPI 

async serial/UART  wiki async serial article  wiki RS-232 article   wiki ASCII codes article   find code   tutorial design

picoblaze-based UART   link #1   link#2

high-speed async serial, using USB-serial bridge  thread#1

Block RAM initialisation  link#1  link#2  link#3  link#4  link#5  link#6  Data2MEM UG6658 (v13.3)

clock forwarding to an output pin   thread #1  thread #2

VCCO connection for unused IO banks  link#1   link#2   link#3   link#4   link#5

pushbutton switch debouncing    description   example solution

an example source-synchronous ADC interface, developed step by step in a forum thread

using PLL to filter clock jitter   thread#1

Design/development of video frame buffer using Spartan-6 MIG DRAM controller (generally interesting thread!)

DDR2/DDR3 DRAM memory interfaces: pin swapping rules   thread #1

Quick and dirty VGA output from FPGA  article#1    article#2

 

Configuration problems:

DONE pin doesn't go HIGH   PLD blog article

How to drive an LED to indicate DONE:  thread

 

Miscellaneous topics:

how to use an oscilloscope
project management link#1
debugging techniques

serial ADC interface methods  link#1
everything you wanted to know about the .mcs PROM file data format   thread#1    AR#476

BGA sockets  thread#1


Development board topics:
care and feeding of ADC, pre-amp, and DAC on many Xilinx development boards link#1  link#2  link#3  link#4

care and feeding of the onboard 2-line character LCDs  link#1  link#2  LCD control example using PicoBlaze

DVI-D vs. HDMI vs. DVI-A vs. VGA    link#1  link#2  wiki EDID article 

FMC link#1 link#2 link#3  link#4

Chrontel CH7301C VGA/DVI video encoder datasheet registers apnote (plus many forum threads discussing this device)

single-player PONG game (Verilog) for Spartan-3A Starter Kit development board  link  youtube video

 

 

ISE toolset

ISE toolset documentation  link#1

"Classic" versions of ISE toolsets for old FPGA families  Table   Answer Record   ISE Classics download page    forum thread

ISE source files types summary   [12.4]   [13.4]    [14.1]

logic trimming in ISE  link#1

Multi-source or multiple drivers error message   thread#1

trouble downloading the software from the Xilinx website?  Try this.

how iMPACT performs indirect programming of configuration memory   link#1

CLOCK_DEDICATED_ROUTE = FALSE error/warning message explained    link#1   link#2

 

Non-ISE toolset

Jim Wu's ADEPT tool - start here.  Excellent report-generation and analysis tool.

 

USB Platform Cable

Trouble installing 13.x, 14.x drivers in Windows 7 machines.  link#1  link#2  link#3

 

Words of wisdom for design students with software backgrounds
These are the first major conceptual hurdles for newbie student designers to overcome:

 

  • The laws of physics do not apply to software, but they apply to real hardware.
  • Verilog, VHDL, and C are imprecise tools for specifying hardware.  You cannot understand how imprecise these tools are unless you first understand the properties and limits of hardware.

 

clock distribution
asynchronous design
power supply sequencing and power supply supervisor
how to read a datasheet (different than Austin's blog entries for reading Xilinx datasheets)
troubleshooting a board which will not self-configure successfully
and, of course, my favourite topic:  circuit board photography.

-- Bob Elkind

SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.

View solution in original post

Tags (1)
Newbie pprrsoldout
Newbie
129,158 Views
Registered: ‎03-28-2012

Re: Links to FAQ threads

Jump to solution

Thanks for the information. A bit overwhelmed but I know this will be very helpful to me and my friends. :smileyhappy:

0 Kudos
Newbie oceandave
Newbie
129,014 Views
Registered: ‎04-01-2012

Re: Links to FAQ threads

Jump to solution
Thank you for the information, its very helpfully information.
0 Kudos
Newbie alexhip3
Newbie
128,933 Views
Registered: ‎04-03-2012

Re: README first: Help for new users

Jump to solution

Readed :D

 

 

Thanks for the information and have a nice day :D

0 Kudos
Newbie alexdman
Newbie
128,760 Views
Registered: ‎04-08-2012

Re: README first: Help for new users

Jump to solution

Thanks for this info. *thumbs up

Alexander Herrera
0 Kudos
127,510 Views
Registered: ‎04-09-2012

Re: README first: Help for new users

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got it~
thanks for info
0 Kudos
Newbie leetruong
Newbie
127,148 Views
Registered: ‎05-26-2012

Re: README first: Help for new users

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Thanks you instruction for newmembers!

I am also a newmember and i am working with core generator,xilinx11.1 have core generator but it no used and how  i can purchase license.

i have been cracked complete but it not used.you help me please!

0 Kudos
Newbie leetruong
Newbie
127,147 Views
Registered: ‎05-26-2012

Re: README first: Help for new users

Jump to solution

My address email:xuantruong_vtdt@yahoo.com.vn

i hope you will help me.

0 Kudos
127,133 Views
Registered: ‎05-26-2012

Re: README first: Help for new users

Jump to solution

Thank you for the information, its very helpfully information. .

Abogados Barcelona
0 Kudos
Newbie oyun
Newbie
31,905 Views
Registered: ‎06-28-2012

Re: README first: Help for new users

Jump to solution

thank you for information 

 

 

0 Kudos
Visitor ping2010
Visitor
31,869 Views
Registered: ‎07-07-2012

Re: README first: Help for new users

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Thanks a lot!

0 Kudos
Newbie westbrowk
Newbie
31,858 Views
Registered: ‎07-08-2012

Re: README first: Help for new users

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Thanks for providing a very detailed information

0 Kudos
Newbie adrianlm2
Newbie
31,791 Views
Registered: ‎07-24-2012

Re: README first: Help for new users

Jump to solution

Great thread! The information regarding clock enables and asynchronous inputs was immediately useful to me. You saved me a heck of a headache. Thanks

0 Kudos
Newbie niko17
Newbie
31,751 Views
Registered: ‎08-05-2012

Re: README first: Help for new users

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Thank you for the information - it looks very difficult for me right now

0 Kudos
31,717 Views
Registered: ‎08-18-2012

Re: Links to FAQ threads

Jump to solution

Thanks for the information. This information is very helpful for mi and other FPGA user also.

0 Kudos
Observer shhrikant1
Observer
31,553 Views
Registered: ‎09-14-2012

Re: README first: Help for new users

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Hi,

 

I have a question regarding single process state machine, 

I read in a forum that In a single process state machine - IF statement not associated with else will not generate latches..

 

Is it true,? If yes , then what exactly is happening inside the box when we use single process state machine?

 

thanks in advance.

 

Shrikant

 

 

 

 

World is great with FPGAs
0 Kudos
Instructor
Instructor
31,555 Views
Registered: ‎07-21-2009

Please start a new thread

Jump to solution

Shrikant,

 

Your questions deserve some time and attention, and this thread is not a proper venue for a lengthy discussion of state machines and coding styles.  Please start a new thread where this discussion can continue without the confusion of other topics and questions.  The Synthesis forum is the best location for your new thread's topic.

 

Welcome to the Xilinx User Forums!

 

-- Bob Elkind

SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
0 Kudos
31,431 Views
Registered: ‎09-28-2012

Re: README first: Help for new users

Jump to solution

I'm new here, thanks for this information.

0 Kudos
Visitor altug.sural
Visitor
31,119 Views
Registered: ‎10-31-2012

Re: Links to FAQ threads

Jump to solution

Thanks for the information, it's very helpful.

0 Kudos
Newbie fnabuurs
Newbie
28,838 Views
Registered: ‎01-09-2013

Re: README first: Help for new users

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Hi,

 

Link 'advanced message search' fails.

 

Regards, frank

0 Kudos
Scholar dwisehart
Scholar
28,527 Views
Registered: ‎06-23-2013

Re: README first: Help for new users

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I see that Xilnx has made changes to their WebCase support pages.  It appears that--at least at the moment--it is not possible to open new WebCases, though I see my existing cases still there (the ones that they are still working on CR's for).  

 

Is this a permanent change?  Will it not be possible to open WebCase's any more?  Does this 'Help for new users' need to be edited to eliminate the 'open a WebCase' suggestion?

 

Thanks,

Daniel

 

0 Kudos
Scholar dwisehart
Scholar
28,516 Views
Registered: ‎06-23-2013

Re: README first: Help for new users

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I received a reply today from Xilinx Tech Support on a an open WebCase, which included this notice:

 

Xilinx Technical Support has changed the support guidelines for the foundation customers and you won’t be able to create Webcases but you can still contact your Xilinx Distributor or Point of Sale for any queries and they can help you out. If needed they can create a webcase for you. 

 

It appears that people using the free Web Downloadable version of the tools will not be able to reach Xilinx Technical Support any more.  How those of us who bought Vivado licences direct from Xilnix will get support is not yet clear: I asked about that but have not heard back.

 

0 Kudos
28,320 Views
Registered: ‎07-22-2013

Re: Links to FAQ threads

Jump to solution

Thank you for the information, its very helpfully information for most of new users.


@eteam00 wrote:

NOTE  This post is a continuing work in progress!

 

This post is a list of links to (mostly) existing user forums posts (or threads).  Each linked item is a "reference material" discussion or presentation of some fundamental principle, concept, problem, or issue which is useful to the new user -- or the beginner-level designer.  Over time this list will grow.  Your questions, comments, and suggestions are welcome.

Design Fundamentals:

handling asynchronous inputs  thread#1 thread#2 thread#3
using clock enables (instead of gated clocks or multiple clocks)  thread#1  thread#2

asynchronous design in Xilinx FPGAs  thread#1

an example of signal timing analysis  thread#1

the RESET signal and function in FPGA design      PLD Blog post on RESET     Ken's RESET white paper

 

Design skills:

I'm a beginner with FPGA designs - where do I start?  Online training tutorials and more:  link#1   link#2   thread#1  thread#2   thread#3 

A blog site for non-FPGA types learning about FPGAs

VHDL/Verilog tutorials and book recommendations  thread#1  link#1  thread#2  thread#3

FPGA design book recommendations thread#1

Excellent beginner's guide, using Basys board and VHDL -- but genuinely useful to all beginners.  Highly recommended!

 

Board design:

decoupling capacitor selection and placement  thread#1   thread#2    thread#3

local (on-board) power supply design for dummies
signal termination and transmission line basics  thread#1

FPGA doesn't configure from SPI on power up - configuration needs to be delayed thread#1  thread#2

Advice thread for board designers

 

Common Interfaces and FPGA techniques:

I2C basics link#1 link#2 code examples   I2C spec Rev 4  wiki articles: I2C  SMBus  MDIO  SPD  EDID

SPI (serial peripheral interface) basics  Wiki article  fpga4fun tutorial  the 'other' SPI 

async serial/UART  wiki async serial article  wiki RS-232 article   wiki ASCII codes article   find code   tutorial design

picoblaze-based UART   link #1   link#2

high-speed async serial, using USB-serial bridge  thread#1

Block RAM initialisation  link#1  link#2  link#3  link#4  link#5  link#6  Data2MEM UG6658 (v13.3)

clock forwarding to an output pin   thread #1  thread #2

VCCO connection for unused IO banks  link#1   link#2   link#3   link#4   link#5

pushbutton switch debouncing    description   example solution

an example source-synchronous ADC interface, developed step by step in a forum thread

using PLL to filter clock jitter   thread#1

Design/development of video frame buffer using Spartan-6 MIG DRAM controller (generally interesting thread!)

DDR2/DDR3 DRAM memory interfaces: pin swapping rules   thread #1

Quick and dirty VGA output from FPGA  article#1    article#2

 

Configuration problems:

DONE pin doesn't go HIGH   PLD blog article

 

Miscellaneous topics:

how to use an oscilloscope
project management link#1
debugging techniques

serial ADC interface methods  link#1
everything you wanted to know about the .mcs PROM file data format   thread#1    AR#476

BGA sockets  thread#1


Development board topics:
care and feeding of ADC, pre-amp, and DAC on many Xilinx development boards link#1  link#2  link#3  link#4

care and feeding of the onboard 2-line character LCDs  link#1  link#2  LCD control example using PicoBlaze

DVI-D vs. HDMI vs. DVI-A vs. VGA    link#1  link#2  wiki EDID article 

FMC link#1 link#2 link#3  link#4

Chrontel CH7301C VGA/DVI video encoder datasheet registers apnote (plus many forum threads discussing this device)

single-player PONG game (Verilog) for Spartan-3A Starter Kit development board  link  youtube video

 

 

ISE toolset

ISE toolset documentation  link#1

"Classic" versions of ISE toolsets for old FPGA families  Table   Answer Record   ISE Classics download page    forum thread

ISE source files types summary   [12.4]   [13.4]    [14.1]

logic trimming in ISE  link#1

Multi-source or multiple drivers error message   thread#1

trouble downloading the software from the Xilinx website?  Try this.

how iMPACT performs indirect programming of configuration memory   link#1

CLOCK_DEDICATED_ROUTE = FALSE error/warning message explained    link#1   link#2

 

Non-ISE toolset

Jim Wu's ADEPT tool - start here.  Excellent report-generation and analysis tool.

 

USB Platform Cable

Trouble installing 13.x, 14.x drivers in Windows 7 machines.  link#1  link#2  link#3

 

Words of wisdom for design students with software backgrounds
These are the first major conceptual hurdles for newbie student designers to overcome:

 

  • The laws of physics do not apply to software, but they apply to real hardware.
  • Verilog, VHDL, and C are imprecise tools for specifying hardware.  You cannot understand how imprecise these tools are unless you first understand the properties and limits of hardware.

 

clock distribution
asynchronous design
power supply sequencing and power supply supervisor
how to read a datasheet (different than Austin's blog entries for reading Xilinx datasheets)
troubleshooting a board which will not self-configure successfully
and, of course, my favourite topic:  circuit board photography.

-- Bob Elkind


Thank you for the information, its very helpfully information for most of new users.

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Newbie ppardeshi
Newbie
28,038 Views
Registered: ‎09-24-2013

Re: README first: Help for new users

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Hi , I'm a MTECH student doing a project realated with Labview Fpga interfacing.

I'm confuse about the basic thing, 

what is diffence between spartan , fpga,  cyclone, dsp board (kits).

I'm working with spartan 3E kit , but wanna know the difference, their prices, their working, their clock rates..

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Visitor anybodyhomeq
Visitor
27,830 Views
Registered: ‎02-11-2014

Re: README first: Help for new users

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Hi,

 

I do not see any instruction on how to contact a LIVE FAE. I am calling all over the globe and all I get is

the automated answering system.

 

If you think that this is how you keep or attrect your customers than you have much to learn.

 

As it stands now Altera has allready provided an answer - and on the phone in 5 minutes.

 

You want me to spend hours and perhaps days to find what I needt when you could cut the

birocracy in 5 minutes .No way Jose.

 

Have heard about Lattice? they sent me a free demo board to evaluate the complexity of the design.

 

This is what I call a VENDOR!

 

Thank you and have a good day.

G

 

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Visitor walk273
Visitor
27,799 Views
Registered: ‎02-14-2014

Re: README first: Help for new users

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yeah

i'm here
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Newbie jacksee00
Newbie
27,179 Views
Registered: ‎04-04-2014

Re: README first: Help for new users

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Got it.Thanks!

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Explorer
Explorer
25,934 Views
Registered: ‎04-23-2014

Re: README first: Help for new users

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@eteam00 Thank you for being here.

I was advised to use a CPLD for my application. The idea is to use it as a simple state machine to drive a CCD array - six synchronized clocks:

 

clocks.jpg

 

Having no previous experience with CPLDs, I do not know where to start. Thinking of using XCR3256XL part for this application. My first question would be how do I program it? Which software to use and what minimum hardware required? I tought that Vivado would to the trick, but it seems to work with FPGAs only.

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Instructor
Instructor
25,926 Views
Registered: ‎07-21-2009

Re: README first: Help for new users

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Naz,

 

Your questions deserve some time and attention, and this thread is not a proper venue for a lengthy discussion of state machines and CPLDs.  Please start a new thread where this discussion can continue without the confusion of other topics and questions.  The CPLD forum is the best location for your new thread's topic.

 

-- Bob Elkind

SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
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