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FPGA Group

9 Posts authored by: pjclarke
So after so many weeks we have come to the end and I have got the whole project working. If you have been following then in Part One we came up with the idea of making a temperature display using a LED matrix (5x8). This would be driven by a FPGA and would get its temperature from a MAX31855 SPI temperature sensor. We then looked at the blocks of code and function blocks that would go into this project.   Then in Part Two I designed and generated the separate code blocks for the functio ...
So now that I have a working display I guess I had better get started on the SPI temperature sensor. The design process here is a little different as we are not just passing data or signals from one block to the next. What we need is a sub block that can process a few instruction to pull in the data from the SPI device.   Now in some cases you may consider a state machine, but no. we first need to look at and think about what the SPI device delivers. The device I’ll be usin ...
pjclarke

FPGA Design Guide Pt3

Posted by pjclarke Mar 11, 2012
So over the last few months if you have been following my FPGA Design guide you will see that I have first blocked out the chucks of logic I needed, then last time I showed you the code used to get my first part of the temperature display working. However I said last time that having all the code in one block of VHDL makes it hard to read and is not a good idea. So this time lets look at the structure of VHDL and using separate files, ‘components’ and get our heads round the ‘e ...
pjclarke

FPGA Design Guide Pt2

Posted by pjclarke Feb 20, 2012
In Part 1 of my Design Guide I looked at the outline of a new project, a temperature meter, and the blocks I’d need to get started. This time I will look at the code used to display the digits on the display and examine a little of what is going on. However I want to first thank people for the questions - that's what this is all about - and address the hardware questions. I will be making a effort to generate the circuits in Eagle so that you can see the full circuits used. However I want ...
pjclarke

FPGA Design Guide Pt1

Posted by pjclarke Jan 30, 2012
Last month I looked at three different FPGA dev kits. You will have seen that I have selected the XuLA FPGA board from XESS that uses a Xilinx chip at its core. This month I want to go though the initial design process I use when designing a FPGA project. Then over the following posts you will see my progress, see the code I write and hopefully start to understand FPGA’s and my chosen language of VHDL. Outline: So I want to know what the temperature is? I want to display this on a differe ...
pjclarke

FPGA Dev Kits

Posted by pjclarke Dec 20, 2011
So if you have been following my series of post on what a FPGA is and which is better VHDL or Verilog then you should by now be thinking about the next step - actually buying a development kit. In this post I will talk about the three kits I think you should consider and why one, in my view wins over the rest for starting out.   Before I get too deep let’s consider what you want from a dev kit. You will need an FPGA that will allow you to do stuff. Sounds silly but what I mean is not ...
This interview was put together to talk about the new ErP2015 changes that are effecting not only manufactures of fans but motors in general. Geoff Lockwood is the Technical Director at ebm-papst but also the Chairman of the EVIAs Fan Working Group.   ...
Over  the last few months I’ve been looking at a number of low cost entry  level FPGA development boards. The XuLa from XESS is one of those and  also one that comes well recommended by other engineers. So in this blog  post I will review how I think it compares to others in the sub $100  price range.   FPGAs  tend to fall into one of two main manufactures, that being Altera and  Xilinx. I’ve always been a Altera and Quartus person writing in ...
pjclarke

Hello element14 -!

Posted by pjclarke Feb 20, 2011
Hello to element14 and  all you guys. I have finally got round to writing my first blog for this  site and rather than posting a blog about anyone subject I have decided  to introduce myself.   I live in the UK and have been doing electronics since  I was about 10years old. Electronics was not my first choice of  career however I followed what was my hobby into becoming a full time  job. I’ve worked at a number of places in my time but now work at ebm-pa ...

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