[chbot] Diligent USB test tools

Sun Apr 9 22:54:19 BST 2017

 

>From what I understand, the original design was a Cypress EZ USB FX2
reference design just configured for sampling bits, and all the smarts
are in the free-to-download PC software. With that in mind I will leave
this here, with out any comment on the moral dilemma it presents:


https://www.aliexpress.com/item/New-USB-SALEAE-24M-8CH-Logic-Analyzer-W-Lines-and-USB-Cable-for-SCM/32778984625.html


But do have a listen to
http://theamphour.com/237-an-interview-with-joe-and-mark-garrison-subtly-spelling-sayleeay/
- it is a very interesting. 

Mike 

On 10.04.2017 09:34, Charles
Manning wrote: 

> On Sun, Apr 9, 2017 at 7:06 PM, Mark Atherton
<markaren1 at xtra.co.nz> wrote:
> 
>> Which Salaea do you have Charles ?
>

> I have one of the old original ones: 8-bt, 24MHz devices they don't
sell any more. The new devices are up to 100MHz. Small print: you
probably can only get 100MHz if you're sampling 2 or 4 bits.
> 
> At one
customer's place there was a problem with some SPI comms getting screwed
up. Very intermittent (one per hour or more). They had a $20k logic
analyser with about a 1-minute deep buffer. Could not catch the
problem.
> 
> We set up the salaea and ran it for an hour. Problem
captured. Problem fixed 20 minutes later.
> 
>> -Mark 
>> 
>> On
9/04/2017 6:24 PM, Charles Manning wrote: 
>> 
>>> I'm with Mike on
this.
>>> 
>>> Nice looking kit, but a real pity it only has 16k
buffers.
>>> 
>>> Being able to stream with the Salaea makes for
something quite amazing. I've used it for logging, then analysing many
hours of samples.
>>> 
>>> On Sun, Apr 9, 2017 at 3:24 PM, Matthew Pike
<jumbledthoughts389 at hotmail.com> wrote:
>>> 
>>>> Seems like my shopping
kart link doesn't work (at least not on my smart phone).
>>>> These are
the items I was referring to: 
>>>> 
>>>> $442.86 Analog Discovery 2
http://www.digikey.co.nz/product-detail/en/digilent-inc/410-321/1286-1117-ND/5810115
[9]
>>>> $23.79 Set of 6 Mini Grabbers
http://www.digikey.co.nz/product-detail/en/digilent-inc/240-052/1286-1050-ND/4090099
[10]
>>>> $31.73 BNC Adaptor board
http://www.digikey.co.nz/product-detail/en/digilent-inc/410-263/1286-1073-ND/4840860
[11]
>>>> $31.73 2 BNC Oscilloscope Probes
http://www.digikey.co.nz/product-detail/en/digilent-inc/460-004/1286-1075-ND/4840870
[12]
>>>> $530.11 (Total)
>>>> 
>>>> I can stand to skip the mini
grabbers, and maybe get cheaper BNC probes elsewhere, but I am still
looking at ~$500.
>>>> That's the most I've every considered spending on
electronics equipment. Christchurch Robotics may be bad for my wallet :)

>>>> 
>>>> Matt Pike
>>>> 
>>>> On 8/04/2017 11:09 a.m., Matthew Pike
wrote: 
>>>> 
>>>>> Looks good to me - I'm going for the Pro Bundle, as
I'd like some BNC scope probes with it. 
>>>>> 
>>>>> Here's a shopping
kart at Digi-Key, with the equivalent items. $530.11.
(http://www.digikey.co.nz/short/3w53b8 [7]) 
>>>>> 
>>>>> If you just
want the scope, $442.86 from Digi-Key. Much better than Element 14 or
RS-Online 
>>>>> 
>>>>> Matt Pike 
>>>>> 
>>>>> On 5/04/2017 6:57 a.m.,
Mike Field wrote: 
>>>>> 
>>>>>> If anybody wants to try before they buy
I can lend you mine for a few days.
>>>>>> 
>>>>>> Pretty much a jack of
all trades, master of none - main restriction being usable bandwidth and
sample buffer sizes are limited.
>>>>>> 
>>>>>> For purely digital work
a Saleae is 100x better as samples are streamed to the PC for analysis
and decode.
>>>>>> 
>>>>>> For analogue work a low end Scope with real
probes is better/usable, and has more bandwidth.
>>>>>> 
>>>>>> Any
bench PSU would be a better PSU. 
>>>>>> 
>>>>>> But it is integration
of all the functions that is awesome, esp between the signal generator
and the scope inputs (so you can test phase and freq response of the
system under test).
>>>>>> 
>>>>>> However it does fit in the palm of
your hand, making it handy if working within its limitations. Much like
any Swiss Army Knife/Leatherman tool I guess 
>>>>>> 
>>>>>> Mike
>>>>>>

>>>>>> -------- Original Message --------
>>>>>> Subject: [chbot]
Diligent USB test tools
>>>>>> From: Mark Atherton 
>>>>>> To:
Christchurch Robotics 
>>>>>> CC: 
>>>>>> 
>>>>>>> All,
>>>>>>> 
>>>>>>>
Have just been forwarded this message, and am taking the liberty of

>>>>>>> passing it on, since it had been forwarded sever times before
it reached 
>>>>>>> me...
>>>>>>> 
>>>>>>> Looks like they are $568.84
from element 14, even so, an interesting 
>>>>>>> piece of kit.
>>>>>>>

>>>>>>> -Mark
>>>>>>> 
>>>>>>> =========================
>>>>>>>

>>>>>>> Just received an Analog Discovery 2 unit for $279 - 
>>>>>>>
http://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/
[1]
>>>>>>> 
>>>>>>> - Farnell have them for about GBP 220 
>>>>>>>
http://uk.farnell.com/digilent/410-321/oscilloscope-usb-2-ch-30mhz-100msps/dp/2528523
[2] 
>>>>>>> .
>>>>>>> 
>>>>>>> This is an interesting bit of kit -
it's a cooperation between Analog 
>>>>>>> Devices (who do all the
signal conditioning and interfacing) and Xilinx, 
>>>>>>> who do the
logic, but put together by Digilent, who sell Xilinx 
>>>>>>>
development systems... Initially just a reference design, i.e. a

>>>>>>> technical paper, they realised that they had something pretty
neat on 
>>>>>>> their hands, so made it a product.
>>>>>>> 
>>>>>>> The
design has turned into a really cool bit of kit at a very acceptable

>>>>>>> price - a full design rationale is available as are all the
schematics 
>>>>>>> etc. in the reference manual (also on the Farnell
page). Its a really 
>>>>>>> nice unit... Two programmable supplies, 2
waveform generator channels, 
>>>>>>> 16 logic channels. Lots of analog
too. 14-bit A/D/A as well, not the 
>>>>>>> usual 12-bit...
>>>>>>>

>>>>>>> Very few compromises have been made - by using 14-bit DACs and
ADCs, it 
>>>>>>> compares very favorably with far more expensive units.
The software is 
>>>>>>> also extremely stable.
>>>>>>> 
>>>>>>> As a
small unit to keep with the laptop, there's not a lot to argue 
>>>>>>>
about... I keep mine with the laptop at all times. The wiring harnesses

>>>>>>> are only $10/each, so I leave those attached to the boards I'm
working 
>>>>>>> on - the WaveForms (free) software has the concept of
projects which 
>>>>>>> contain the configurations of all the devices on
the AD2 that you are 
>>>>>>> using for each setup, so switching boards
takes literally a minute (or 
>>>>>>> less).
>>>>>>> 
>>>>>>> I was
using it on the flight from the UK back to the UAE last week - I

>>>>>>> had my laptop out, a Texas Instruments MSP-EXP430FR5969
development 
>>>>>>> board and the Analog Discovery - 6 hours of
uninterrupted development 
>>>>>>> time - USB-powered dev environments
are wonderful. No problems from 
>>>>>>> other passengers or the crew -
I told the steward in advance I was an EE 
>>>>>>> and that I'd be
working on the 'plane - I also made sure to keep any 
>>>>>>> blinking
LEDs concealed
>>>>>>> 
>>>>>>> I also have the probe expansion board -
just so cute!
>>>>>>> 
>>>>>>> * Two-channel USB digital oscilloscope
(1MΩ, ±25V, differential, 
>>>>>>> 14-bit, 100MS/s, 30MHz+ bandwidth -
with the Analog Discovery BNC 
>>>>>>> Adapter Board
>>>>>>> *
Two-channel arbitrary function generator (±5V, 14-bit, 100MS/s, 
>>>>>>>
12MHz+ bandwidth - with the Analog Discovery BNC Adapter Board
>>>>>>> *
Stereo audio amplifier to drive external headphones or speakers 
>>>>>>>
with replicated AWG signals
>>>>>>> * 16-channel digital logic analyzer
(3.3V CMOS and 1.8V or 5V 
>>>>>>> tolerant, 100MS/s)
>>>>>>> *
16-channel pattern generator (3.3V CMOS, 100MS/s)
>>>>>>> * 16-channel
virtual digital I/O including buttons, switches, and 
>>>>>>> LEDs -
perfect for logic training applications
>>>>>>> * Two input/output
digital trigger signals for linking multiple 
>>>>>>> instruments (3.3V
CMOS)
>>>>>>> * Single channel voltmeter (AC, DC, ±25V)
>>>>>>> *
Network analyzer - Bode, Nyquist, Nichols transfer diagrams of a

>>>>>>> circuit. Range: 1Hz to 10MHz
>>>>>>> * Spectrum Analyzer -
power spectrum and spectral measurements (noise 
>>>>>>> floor, SFDR,
SNR, THD, etc.)
>>>>>>> * Digital Bus Analyzers (SPI, I²C, UART,
Parallel)
>>>>>>> * Two programmable power supplies (0…+5V , 0…-5V). The
maximum 
>>>>>>> available output current and power depend on the Analog
Discovery 2 
>>>>>>> powering choice:
>>>>>>> 
>>>>>>> ...250mW max for
each supply or 500mW total when powered through USB
>>>>>>> 
>>>>>>>
...2.1W max for each supply when powered by an auxiliary supply. 700mA

>>>>>>> maximum current for each supply.
>>>>>>> 
>>>>>>> As of March
17th, they have also released a fully-fledged logic analyser 
>>>>>>>
version, the Digital Discovery for $199 - 
>>>>>>>
http://store.digilentinc.com/digital-discovery-portable-logic-analyzer-and-digital-pattern-generator/
[3] 
>>>>>>> .
>>>>>>> This is an up to 800MHz multi-channel logic
analyser & pattern generator 
>>>>>>> for peanuts.
>>>>>>> 
>>>>>>>
_______________________________________________
>>>>>>> Chchrobotics
mailing list Chchrobotics at lists.linuxnut.co.nz
>>>>>>>
http://lists.ourshack.com/mailman/listinfo/chchrobotics [4]
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Archives: http://lists.ourshack.com/pipermail/chchrobotics/ [5]
>>>>>>>
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venue, directions and dates.
>>>>>>> When replying, please edit your
Subject line to reflect new subjects.
>>>>>> 
>>>>>>
_______________________________________________
>>>>>> Chchrobotics
mailing list Chchrobotics at lists.linuxnut.co.nz
>>>>>>
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Archives: http://lists.ourshack.com/pipermail/chchrobotics/ [5]
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>>>>> 
>>>>>
-------------------------
>>>>> 
>>>>> [8]
>>>>> 
>>>>> This email has
been checked for viruses by AVG antivirus software. www.avg.com [8]

>>>>> 
>>>>> _______________________________________________
>>>>>
Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>>>>>
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_______________________________________________ Chchrobotics mailing
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>>> 
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> 
>
_______________________________________________
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Links:
------
[1]
http://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/
[2]
http://uk.farnell.com/digilent/410-321/oscilloscope-usb-2-ch-30mhz-100msps/dp/2528523
[3]
http://store.digilentinc.com/digital-discovery-portable-logic-analyzer-and-digital-pattern-generator/
[4]
http://lists.ourshack.com/mailman/listinfo/chchrobotics
[5]
http://lists.ourshack.com/pipermail/chchrobotics/
[6]
http://kiwibots.org
[7] http://www.digikey.co.nz/short/3w53b8
[8]
http://www.avg.com/internet-security
[9]
http://www.digikey.co.nz/product-detail/en/digilent-inc/410-321/1286-1117-ND/5810115
[10]
http://www.digikey.co.nz/product-detail/en/digilent-inc/240-052/1286-1050-ND/4090099
[11]
http://www.digikey.co.nz/product-detail/en/digilent-inc/410-263/1286-1073-ND/4840860
[12]
http://www.digikey.co.nz/product-detail/en/digilent-inc/460-004/1286-1075-ND/4840870
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