Discussion:
[Arm-netbook] Open source Allwinner R40 circuit diagrams
joem
2018-04-09 14:34:44 UTC
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7th page uploaded in KiCAD

https://hellosemi.com/KiCAD_Linux_Boards.html

(Still only find the BPi version so far)

Thinking first board will be a minimalist square board with SoC 2GB DRAM
serial uSD HDMI PMIC SATA USB flash just to get it to boot.
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Luke Kenneth Casson Leighton
2018-04-09 17:17:48 UTC
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Post by joem
7th page uploaded in KiCAD
https://hellosemi.com/KiCAD_Linux_Boards.html
fantastic!
Post by joem
(Still only find the BPi version so far)
Thinking first board will be a minimalist square board with SoC 2GB DRAM
serial uSD HDMI PMIC SATA USB flash just to get it to boot.
sounds eminently sensible.

l.

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joem
2018-04-11 23:30:20 UTC
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All 11 page KiCAD conversion complete and uploaded.
Now moving to layout - done up Allwinner R40 BGA and 8GB eMMC BGA
footprints.

https://hellosemi.com/KiCAD_Linux_Boards.html
Post by Luke Kenneth Casson Leighton
Post by joem
Thinking first board will be a minimalist square board with SoC 2GB DRAM
serial uSD HDMI PMIC SATA USB flash just to get it to boot.
sounds eminently sensible.
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Luke Kenneth Casson Leighton
2018-04-11 23:41:10 UTC
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Post by joem
All 11 page KiCAD conversion complete and uploaded.
Now moving to layout - done up Allwinner R40 BGA and 8GB eMMC BGA
footprints.
https://hellosemi.com/KiCAD_Linux_Boards.html
very cool!

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joem
2018-04-12 23:08:52 UTC
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Now finished footprints for all essential items - Ethernet, SMD version
of SATA, uSD card, DDR, HDMI, AP6212 WIFI, AXP221s PMIC, eMMC, R40 CPU.
With these anyone should be able to lay out their own boards.
Post by Luke Kenneth Casson Leighton
Post by joem
All 11 page KiCAD conversion complete and uploaded.
Now moving to layout - done up Allwinner R40 BGA and 8GB eMMC BGA
footprints.
https://hellosemi.com/KiCAD_Linux_Boards.html
very cool!
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Luke Kenneth Casson Leighton
2018-04-12 23:46:36 UTC
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Post by joem
Now finished footprints for all essential items - Ethernet, SMD version
of SATA, uSD card, DDR, HDMI, AP6212 WIFI, AXP221s PMIC, eMMC, R40 CPU.
With these anyone should be able to lay out their own boards.
superb. i might point someone i know at these, he may be interested
to use them.

l.

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joem
2018-04-16 17:50:59 UTC
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Post by Luke Kenneth Casson Leighton
superb. i might point someone i know at these, he may be interested
to use them.
You are welcome :)

Now I customize the design into a new minimalist R40 server board:
https://www.hellosemi.com/KiCAD_Server_Board.html

This board has 2GB RAM, gbit ethernet, SATA, camera, MIPI display, HDMI,
uSD, 8GB flash, USB OTG, USB 2.0 x 2. Removed are wifi/bluetooth, audio,
mic, Pi connector, IR module. The 8GB flash required a lot of rework as
the BGA pinouts were incorrect in the original drawing. Also I had
duplicate annotation and missing annotations in my previous KiCAD. Added
more footprints where they did not exist from KiCAD libraries. All
footprints were copied to local relative directory because switching
between different PCs is a total pain at this moment with KiCAD. After
all that work, the netlist import works without errors, and viewing 3D
works without errors :)
Anyone can lay it out now.
I'm guessing this PCB will come out with a BOM cost less than $20.

For some reason Allwinner R40 SATA read seems fast but write is very
sloooow. Anyone know?
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Luke Kenneth Casson Leighton
2018-04-16 18:01:43 UTC
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crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
Post by joem
Post by Luke Kenneth Casson Leighton
superb. i might point someone i know at these, he may be interested
to use them.
You are welcome :)
https://www.hellosemi.com/KiCAD_Server_Board.html
This board has 2GB RAM, gbit ethernet, SATA, camera, MIPI display, HDMI,
is ir 4x DDR3 x8? those are getting stupidly hard to get hold of
however i found a company in taiwan that can make some.

l.

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joem
2018-04-16 18:32:49 UTC
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Post by Luke Kenneth Casson Leighton
is ir 4x DDR3 x8? those are getting stupidly hard to get hold of
however i found a company in taiwan that can make some.
SK Hynix H5TQ4G83AFR = 512M x 8

I think this week layout finish and I send it off to be made.
If the RAM cannot be sourced, then get it laid out with
new RAM in 'no time' because there is KiCAD drawings available.
All these improvements to KiCAD has made it thunderingly fast.
A lot of the work actually got done in text editor
and spread sheet csv files believe it or not ;)
That is because the entire data is in text files instead of binary
files.

I want to add a $1 STduino chip to gain control of the server
at pre-boot stage and post-boot so when it goes into an array,
I can talk to the board through RS232 link to the stduino to
tell it to reboot the board, or shut it down in a server array without
adding any more complexity to the board.
I might do that before sending it off to get it made.
Adds 1 to 2 days delay because I got all that in KiCAD already :)
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Luke Kenneth Casson Leighton
2018-04-16 18:39:24 UTC
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Post by joem
Post by Luke Kenneth Casson Leighton
is ir 4x DDR3 x8? those are getting stupidly hard to get hold of
however i found a company in taiwan that can make some.
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
Post by joem
I want to add a $1 STduino chip to gain control of the server
at pre-boot stage and post-boot so when it goes into an array,
STM8S003 is ridiculously cheap and really awesome. STM32F030 is also
likewise cheap.

l.

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joem
2018-04-16 19:04:29 UTC
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Post by Luke Kenneth Casson Leighton
however i found a company in taiwan that can make some.
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.

First get it to boot, then ditch for cheaper RAM - someone selling for
$14
(probably fake). Thanks for head up.
Post by Luke Kenneth Casson Leighton
Post by joem
I want to add a $1 STduino chip to gain control of the server
at pre-boot stage and post-boot so when it goes into an array,
STM8S003 is ridiculously cheap and really awesome. STM32F030 is also
likewise cheap.
STM32F103C8T6 or GD32F103C8T6 - has USB so skip having to buy a separate
USB serial

Twitter handle - https://twitter.com/HelloHypercube
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Luke Kenneth Casson Leighton
2018-04-16 21:09:08 UTC
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Post by Luke Kenneth Casson Leighton
Post by Luke Kenneth Casson Leighton
however i found a company in taiwan that can make some.
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
First get it to boot, then ditch for cheaper RAM - someone selling for
$14
(probably fake).
posssibbllyyy.... you might get lucky, but have someone actually from
china buy them so they have "legal recourse".
Post by Luke Kenneth Casson Leighton
Thanks for head up.
no problem.
Post by Luke Kenneth Casson Leighton
Post by Luke Kenneth Casson Leighton
Post by joem
I want to add a $1 STduino chip to gain control of the server
at pre-boot stage and post-boot so when it goes into an array,
STM8S003 is ridiculously cheap and really awesome. STM32F030 is also
likewise cheap.
STM32F103C8T6 or GD32F103C8T6 - has USB so skip having to buy a separate
USB serial
oh of course. then STM32F070 / 072 - they're cheaper than the 103. i think

l.

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joem
2018-05-13 12:38:07 UTC
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Post by joem
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
RAM continues to be a problem to source.

KiCAD version of R40 server board on a go slow pace at the moment -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.KiCADServerBoard
(Some errors have left the power lines crossed in multiple places.)
Also can't seem to raise Allwinner (no replies). Probably manage without
tech support for now.

In the mean time, been doing other KiCAD boards.
A blue pill (ST clone of Atmega Arduino) -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.HypercubeBluePillSTDuinoBoard


There is some infographic here about how to make intelligent Lithium
battery packs for autonomous systems -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.HypercubeLithiumPrototypingBoard


And some info here about R40 boards for modularized AI + vision
recognition and getting it to do some work with Arduino to do basic IoT
work with it -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.AIBoards

All the other open source boards (or soon to be)
https://hellosemi.com/hypercube/pmwiki.php?n=Main.OpenSourceBoards
--
JoeM

Twitter - https://twitter.com/HelloHypercube
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Luke Kenneth Casson Leighton
2018-05-13 21:07:52 UTC
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Post by joem
Post by joem
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
RAM continues to be a problem to source.
I did tell / warn you.... :)
Post by joem
KiCAD version of R40 server board on a go slow pace at the moment -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.KiCADServerBoard
(Some errors have left the power lines crossed in multiple places.)
Also can't seem to raise Allwinner (no replies). Probably manage without
tech support for now.
Yehh thats not a surprise, are you placing an order for 100k units? Then
they might reply
Post by joem
In the mean time, been doing other KiCAD boards.
A blue pill (ST clone of Atmega Arduino) -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.
HypercubeBluePillSTDuinoBoard
You seen the board i did , right? Stl470? Akso can fund st cimmunity link
for you they should be a long way along by now. Small form factor v
cgallengung to get cost down.

2 layer st arduino clones are really tough to do
Post by joem
There is some infographic here about how to make intelligent Lithium
battery packs for autonomous systems -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.
HypercubeLithiumPrototypingBoard
And some info here about R40 boards for modularized AI + vision
recognition and getting it to do some work with Arduino to do basic IoT
work with it -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.AIBoards
All the other open source boards (or soon to be)
https://hellosemi.com/hypercube/pmwiki.php?n=Main.OpenSourceBoards
--
Thx joe
Post by joem
JoeM
Twitter - https://twitter.com/HelloHypercube
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joem
2018-05-14 10:27:28 UTC
Permalink
Post by Luke Kenneth Casson Leighton
Post by joem
Post by joem
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
RAM continues to be a problem to source.
I did tell / warn you.... :)
Hmmm... wonder what Allwinner and everyone dependent on DDR3 is
going to do / need to do with their working CPUs that are going
to get supported for the next 10 years or so.
Post by Luke Kenneth Casson Leighton
Post by joem
KiCAD version of R40 server board on a go slow pace at the moment -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.KiCADServerBoard
(Some errors have left the power lines crossed in multiple places.)
Also can't seem to raise Allwinner (no replies). Probably manage without
tech support for now.
Yehh thats not a surprise, are you placing an order for 100k units? Then
they might reply
Softbank has now a similar all customers are too small policy - they
invest
only in No.1 startups now. No.2 takes
such a long time to become No.1 they can't be bothered.
So they would never have invested in Google, Amazon, Microsoft,
Alibaba, Apple etc when they were operating out of their garages then I
assume.

So you know Softbank acquired ARM. Now they are thinking of
selling to pay for all the debts piling up around them.
Complete disaster for ARM and everyone else I can only assume.
But China has secured a position against ARM failure by insisting on
forming a joint venture unit in China with 51% control.
Good thing they did! :)

What Allwinner should do is have two teams - one for small customers
and one for large. Otherwise the pressure to go elsewhere
or make own chips grows and grows.
Its not that expensive now - MOSIS - https://www.mosis.com/
Post by Luke Kenneth Casson Leighton
Post by joem
In the mean time, been doing other KiCAD boards.
A blue pill (ST clone of Atmega Arduino) -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.
HypercubeBluePillSTDuinoBoard
You seen the board i did , right? Stl470?
No seen it yet - I did a google search - can't find it.
Post by Luke Kenneth Casson Leighton
Akso can fund st cimmunity link
for you they should be a long way along by now. Small form factor v
cgallengung to get cost down.
?
Post by Luke Kenneth Casson Leighton
2 layer st arduino clones are really tough to do
The ones I do are not verbatim clones so the pin mappings are completely
different and easier on layout. The pins go to FPC which has resistor
patch panel
that allows any CPU pin to be patched manually to any FPC pin :)
The peripheral boards remain the same pin always and has
no patch panel. This means when boards blow, throw away faulty
peripheral board
and replace with new one using FPC. If CPU board blows, then repatch a
new board and its good to go with FPC connectors to connect to
peripheral boards.

JoeM
Twitter - https://twitter.com/HelloHypercube

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joem
2018-05-22 08:31:16 UTC
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Post by Luke Kenneth Casson Leighton
Post by joem
Post by joem
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
RAM continues to be a problem to source.
I did tell / warn you.... :)
Just heard cryptocurrency mining is going down the tube
and it may just crash memory market with it - so price bubble
may burst by end of year.

JoeM
Twitter - https://twitter.com/HelloHypercube

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Luke Kenneth Casson Leighton
2018-05-22 22:55:54 UTC
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---
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
Post by joem
Post by Luke Kenneth Casson Leighton
Post by joem
Post by joem
SK Hynix H5TQ4G83AFR = 512M x 8
27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you
can get hold of them.
RAM continues to be a problem to source.
I did tell / warn you.... :)
Just heard cryptocurrency mining is going down the tube
yyyeah that's unlikely to happen... or, more to the point, whomever
you heard it from is likely to be trying to create a "pump-and-dump"
social-engineering scam. sell first, scare everyone, then buy low.
Post by joem
and it may just crash memory market with it - so price bubble
may burst by end of year.
hooray!! .... *thinks*.... GDDR5 is (i believe) what's commonly used
in graphics cards.... you definitely don't want to be using DDR3 or
DDR4 for cryptomining platforms with standard GPUs in them.

l.

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Luke Kenneth Casson Leighton
2018-06-12 13:15:01 UTC
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Post by joem
Post by joem
In the mean time, been doing other KiCAD boards.
Post by joem
A blue pill (ST clone of Atmega Arduino) -
https://hellosemi.com/hypercube/pmwiki.php?n=Main.
HypercubeBluePillSTDuinoBoard
You seen the board i did , right? Stl470?
No seen it yet - I did a google search - can't find it.
Akso can fund st cimmunity link
Post by joem
for you they should be a long way along by now. Small form factor v
cgallengung to get cost down.
?
http://hands.com/~lkcl/stl47o/
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