[time-nuts] Divide by five
Bob Camp
kb8tq at n1k.org
Sat Nov 8 21:35:18 EST 2014
Hi
One of the more interesting uses for something like a Cyclone V would be a front end board to drive a KS-24361 from an ensemble of sources. That’s what David Allan’s original idea was when he started the whole software empire that turned into the Z3801 and all the rest.
Bob
> On Nov 8, 2014, at 8:36 PM, Bert Kehren via time-nuts <time-nuts at febo.com> wrote:
>
> We do most our projects with Altera G/A.
> The biggest benefit is that if something does not work on first pass
> changing the G/A logic is much faster, less costly than a new board layout.
> Bert Kehren
>
>
> In a message dated 11/8/2014 6:17:29 P.M. Eastern Standard Time,
> kb8tq at n1k.org writes:
>
> Hi
>
> I’ve done a lot of designs with Altera parts. They are fine parts, but
> they are not magic. On the CPLD parts, be careful of the speed grade and be
> sure you do a timing analysis on your design before you buy any hardware. All
> the design tools are schematic entry capable and free on the web. There’s
> not a big speed bump when you start using them (like say needing to go
> learn VHDL…).
>
> Once you get using them, the CPLD's are quite handy for a wide range of
> projects, way beyond a simple divide by 5. Their bigger cousins (the FPGA’s)
> aren’t that much more (under $35) and they will do a LOT, especially in the
> newer series. The Cyclone 2’s had a minimum rated PLL input of 20(?) MHz.
> The later parts bumped that down to 10 MHz. Much more TimeNuts compatible.
>
> Bob
>
>> On Nov 8, 2014, at 5:58 PM, cfo <xnews5 at luna.dyndns.dk> wrote:
>>
>> On Sat, 08 Nov 2014 09:58:36 +0100, Francesco Messineo wrote:
>>
>>>
>>> can anyone suggest a (cheap if possible) programmer and software for
>>> these modern PLD?
>>>
>>> Thanks and best regards Frank IZ8DWF
>>
>> I'd suggest ALTERA parts , but only because they are the cheapest boards
>> on *bay , XILINX boards are 2 x the Altera price on *Bay.
>>
>> An EPM240 CPLD Board $9 (240 cells let you do quite a lot)
>> http://tinyurl.com/qcusb69
>>
>> There's also an EPM-570 Board , but the price is almost the same as the
>> below FPGA , and then the FPGA is the thing to get.
>>
>>
>> A CycloneII EP2C5T144 FPGA board (With 2 onbard PLL's) $18 - Super value
>> for the money
>> http://tinyurl.com/pd326ct
>>
>> An ALTERA Programmer $6
>> http://tinyurl.com/po2qhq2
>>
>>
>> The only caveat is that they are NOT 5v tolerant , they can do 3v3 or
>> less.
>>
>>
>> ALTERA has the free QuartusII WEB Edition , and it works fine under both
>> Windows & Linux (i'm using Mint17 x64 ... Ubuntu 14.04 based "under the
>> hood")
>>
>> I am a VHDL beginner , and completed this (free) course s few month back
>>
>> Course
>> http://tinyurl.com/per8lm5
>>
>> Forum
>> http://tinyurl.com/pw3b9bv
>>
>>
>> I have just did a divide by 5 with the EP2C5T144 FPGA board , using one
>> of the PLL's. I did use so few resources, that it reported 0% of the
> 4608
>> Cells utilized, and 1 of 2 PLL's used.
>>
>> *********** SNIP *************
>> Fitter Status Successful - Sat Nov 8 23:11:59 2014
>> Quartus II 64-Bit Version 13.0.1 Build 232 06/12/2013 SP 1 SJ Web
>> Edition
>> Revision Name div5pll
>> Top-level Entity Name div5pll
>> Family Cyclone II
>> Device EP2C5T144C8
>> Timing Models Final
>> Total logic elements 0 / 4,608 ( 0 % )
>> Total combinational functions 0 / 4,608 ( 0 % )
>> Dedicated logic registers 0 / 4,608 ( 0 % )
>> Total registers 0
>> Total pins 6 / 89 ( 7 % )
>> Total virtual pins 0
>> Total memory bits 0 / 119,808 ( 0 % )
>> Embedded Multiplier 9-bit elements 0 / 26 ( 0 % )
>> Total PLLs 1 / 2 ( 50 % )
>> *********** SNIP *************
>>
>> Actually i like Xilinx ISE WebPack better , but the cheap
> *Bay/Aliexpress
>> boards are ALTERA Boards , so i have both tools installed on my linux
>> machine.
>>
>>
>> If you don't feel like learning VHDL or Verilog , you can do the layout
>> in "Schematic". ALTERA QuartusII does have an extensive 74xx lib built
> in
>> the schematic engine.
>>
>> See my ansver to assignment 10 , for a QuartusII schematic entry of a
> 50M
>> divider. Using use 4 x HC390 dividers in a divide : 100 / 100 / 100 / 50
>> configuration.
>> http://tinyurl.com/ntdkcst
>>
>>
>> Be sure to get these versions of the tools , as both have upgraded their
>> tools , and the new tools doesn't support the older (cheaper chips).
>>
>> Altera QuartusII : Version 13.0sp1 (13.1+ doesn't suport the old
> CPLD's)
>> Xilinx ISE : Version 14.7 (Vivado doesn't support the old stuff)
>>
>>
>> I suggest to try it out , you can do a lot of logic in a 240 Cell CPLD ,
>
>> and MUCH more in the FPGA.
>>
>> The 4 x HC390 used 16% of the EPM240 logic , and it is less than 1% in
>> the FPGA. As seen below.
>>
>> *********** SNIP ***************
>> Flow Status Successful - Sat Nov 8 23:56:46 2014
>> Quartus II 64-Bit Version 13.0.1 Build 232 06/12/2013 SP 1 SJ Web
>> Edition
>> Revision Name lesson10d
>> Top-level Entity Name lesson10d
>> Family Cyclone II
>> Device EP2C5T144C8
>> Timing Models Final
>> Total logic elements 39 / 4,608 ( < 1 % )
>> Total combinational functions 39 / 4,608 ( < 1 % )
>> Dedicated logic registers 31 / 4,608 ( < 1 % )
>> Total registers 31
>> Total pins 3 / 89 ( 3 % )
>> Total virtual pins 0
>> Total memory bits 0 / 119,808 ( 0 % )
>> Embedded Multiplier 9-bit elements 0 / 26 ( 0 % )
>> Total PLLs 0 / 2 ( 0 % )
>> *********** SNIP ***************
>>
>>
>> CFO - Denmark
>>
>> --
>> E-mail:xnews5 at luna.dyndns.dk
>>
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