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Hi
Thanks for all your responses, I think that I have a better idea on PIC interfacing now.
bjuric: I hadn't realised that the inputs were set as high impedance, your answer makes total sense, thanks.
I know it may sound overkill to be optically isolating this I/O, but what I didn't...
Hello,
I am trying to interface some 5V TTL signals through an optocoupler to a microchip PIC16C55A microcontroller. I need to calculate the current to drive my opto with so that I won't damage the input of my micro.
When I went to the datasheet for the PIC, I found that:
Max. current into...
Hi,
I currently use LTSpice to carry out analog simulation of my designs, but is it possible to to some simple logic simulation using LTSpice. I am trying to simulate a digital frequency divider using counter ICs and a crystal.
If I can't do this, could anyone suggest an alternative...
I see....
Then you will need Ohm's Law (the most essential relationship in electronics), and Thevinin's Theorems will also send you on your way.
--dave
You are going to have to be *much* more specific than that. Use google to do some research, buy a book - I found that 'The Art of electronics', Horowitz and Hill is a good starter.
Then come back and ask more specific questions
--dave
You may also want to look at the STM32 series of ARM Cortex-M3 processors from ST Micro. There are very detailed reference documents available from their website (www.st.com/stm32) and also they have a library of pre-built functions and worked example programs for the peripherals which you can...
Thats quite an interesting point bbgil, when you say additional I/O boards, is that extra comps around the CPLD on the target, or do I need something else to program it apart from the Xilinx platform2 cable and a JTAG interface on my target?
More research needed, I think.
--dave
Excellent link tupadupa, thank you very much.
I couldn't find out how much the full featured software costs, but the tutorials look good, I shall be playing with the student edition software very soon.
Thanks again!
--dave
I've just come to that conclusion after some time reading references on various websites. I think that I will be staying with CPLD as the applications I will be designing are not really going to justify the complexity of a full-blown FPGA, but I notice that I can still use low to medium density...
That sounds like a good plan, would that help me with the language syntax? Also, I am using a CPLD device, is there mucyh difference between that and an FPGA?
--dave
I am looking to learn some HDL for a small project, but which way to turn? Should I go more towards VHDL or Verilog - what does most of the industry use?
Also, I would appreciate any pointers to primers or tutorials in workflows, programming and simulation of these devices (I already have a...
Hello,
I am looking at developing a simple application modifying a pulse train and some other functions using a CPLD device, however I have no knowledge of the relative pros and cons of devices from Altera and xilinx.
Can anyone offer advice on which may have the best, more intuitive tools...
Thats quite a good idea, I wouldn't then have to find a more expensive micro with a USB interface. Do you have any experience with the microchip USB dev kit for their PIC18 chips, I read something that suggested to just modify their code a bit.
The one other thing that concerns me with that...
Hello,
I am looking at a project to build a home flightsim cockpit, and am looking at how to interface a set of switches to the PC over USB so that it is seen like any other game controller.
I assume that somewhere along the line I will need a micro to do this, but does anyone have any tips...
Hello,
I am attempting to change the default colours of the import layer on GCPreview to match those which are used on my PCB layout package to make checking easier. Is there a way to do this apart from changing them each time I import, as I couldn't find a setting to do so and the help files...
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