Unofficial Austrumi Linux for English users forum golf & dvd

A Latvian and english Linux tiny operating system. used by golf & dvd lovers

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#1 2012-03-09 12:05:38

atang1
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Registered: 2006-03-30
Posts: 2705

Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Ethernet jacks not connecting because of missing transformer ferrite filter from IC to RJ45 jack.

Problem is serious because pinouts are different, no way to do work around until the jacks are replaced. Both Taiwan and China production sources used the cheaper jacks. The magnetic jacks cost $7 retail, less 40% for production quantities. Even though it is only a few ferrite beads, it changes the pinouts to the iC. Its needed to do fast ethernet and filters the stray frequencies to discriminate fast ethernet data better.

This is the B product or $35 each. The A product for $25 does not have ethernet port(USB only).

Its really amazing that no larger manufacturers took up the project. Production quantity of 10,000 unit starts are not large for wave soldering and automatic parts insertion machines.

Partly, it is because the BCM cpu is the older version ARM11 or ARM6. Its life is less attractive when Apple is trending back to rich experience than big data transfer only.

So, what will puppy Linux do beyond Arch Linux ARM or Fedora remix? Android v2.1 only uses 128 mB of drams with 2 gB of flash memory doing swap. Rasp Pi had no display or touch screen?

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2012-03-09 12:05:38

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#2 2012-03-09 12:17:31

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Metro in windows8 has a block diagram published. So, everybody knows how to write webpages and desktop webpages for productivity.

Firefox is going to do metro webpages for Microsoft?

Apple is redesigning ARM cpu to do rich experience, even increase the power and size of lithium battery.

Is puppy better off to do operating system for replacing WinCE with IE6 in tablets. That is a real need because Windows8 will not support older ARM cpus(only TI, Qualcomm, and nvidia).

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#3 2012-03-09 12:23:13

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry Pi may die a premature death when the idea stopped at motherboard of the PC era.

PC is dead because of big data from data centers. Data transfer speed is the first priority. Multichannels are the download manager functionality. Now add high resolution and rich Dolby mobile audio to be competitive? This makes up the future of ARM architecture.

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#4 2012-04-14 10:48:41

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry Pi passed the EMI emission tests. Which is just having a ground plane on the pcboard.

What is still holding the delivery up is the functionality of the unit, whether the units worked.

The production is by hand soldering, and may have quality control problems. Previously had to rectify the magnetic ethernet jack.

So, we have to wait and see how this project end up without any problems. Sampling QC or 100% testing maybe a decision yet to be made.

There is now news of the delivery of the units after the customers received email with codes for purchase. After purchase, you have to add a TV(RCA video and audio connections) and a keyboard to do word processing chores.

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#5 2012-04-30 12:16:06

dabbu77
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Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Surprisingly! It’s like you understand my mind! You seem to know a lot about this, like you wrote the book in it or something. I think that you could do with some images to drive the message home a bit, but other than that, this is wonderful forum. A good read. I’ll certainly be back.

 

#6 2012-05-02 10:06:47

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry Pi uses Telechip cpu, which has hardware FPU for graphics data compression zoom by reduced pixels.

Telechip cpu is used in many first generation tablets. So the Android v2.2 should work with Raspberry Pi if touch screen and 7" lcd screen can be used with the motherboard of Raspberry Pi.

The understanding of ARM cpus is what the Linux community has to find and learn. How to use ARM cpu functions?

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#7 2012-05-27 08:37:31

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

There are more motherboards offered on ARM platform. Small in size but tempted to go big in applications and added components such a camera. A camera on a motherboard with flexible cable is an idea not well thought out. camera has to have a steady mount? Motherboards without case can not be a home for camera.

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#8 2012-06-08 08:40:19

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry pi delivered to Barry.

Immediately USB hub was added, but found flash card not recognized by hotplug. Cold plug before boot will have flash card mounted. This is the prrequsite of aRM platform to have data storage mounted during boot.

Then data stored can mount wifi connection, using internet browser to operate website switching and speed dialing of webpages. Apps and games are on webpages.

Apps and games run by the kernel has to have latest openGL 3D to accelerate video display. Webpages are run by realtime OS with javascript. Adobe flash player has mpeg4/h.264 video compression. for hdmi display.

Whether these tiny motherboards use touch screen or not depends on the embedded use. It is not a PC because it has no bios to connect peripherals by memory address switching in DDR architecture. The 127 USB ports need 127 memory addresses to transfer data.

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#9 2012-06-10 08:21:33

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

When a new platform is coming to replace the old computer platforms, there must be a reason. the reason is big data on the internet replaces productivity offline on the desktop.

This showed up in the browser design for faster data transfer rates. It made webpages operating systems to run apps. it had openGL as a standard video accelerator. It simplified video processor to hdmi connectivity. Watch out for 720p not being as good as 720i?

These all started when browser operating system was proposed many years ago. Now it is a reality.

So, android started with phones and can do internet. But android doing office offline maybe not big data inclusive and will fail in popularity, when it is proven not able to synchronize data in webpages.

Google may have a rude awakening coming. I just discovered that some internet business selling information tried chain letters but stealing your private email listings in Yahoo or gmail, etc. to do their business. That is going too far, violating laws to synchronize private data in webpages for illegal profit.

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#10 2012-06-23 07:53:07

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Just like tk software apps for puppy, ARM cpu embedded system has many open source apps too.

Android chrome browser is definitely one of the most significant software to use for puppy. The chrome will bring along 100,000 apps and games in their app store. Linux kernel must have latest opengL installed..

The big data from online banking, credit card transactions are all data in webpages to be accessed; but someday needs backup.

So, Raspberry Pi is discovered, not so much Linux kernels; just sufficient to run chrome browser.

Then add the killer app to backup dated webpages with important data in your own data storage device. Backup data needs to be displayed in speed dial window manager in browser for comparison with the latest data from those websites(error checking).

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#11 2012-06-28 06:43:05

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Puppy continues to struggle with ARM platform embedded design of demo circuits(Raspberry pi) without bios and without time clock.

Until the developers understood big data structure and the need of nothing from the desktop, puppy will confuse itself with Linux kernels and IBMPC architecture.

When you boot into browser operating system such as chrome, all computer functions are derived from internet websites. Such as atomic clock update, and speed dial desktop replacement of icons for computer functions..

Paperless society do not need printer. And the whole philosophy of computer usage has been upgraded. to make IBMPC obsolete.

when we restore older laptops of slower cpu, we use faster wifi pc-cards made by lucent(orinoco_cs).  Which when downloading at 600kBps can be life saver for these older laptops.

Then, browsers are autoupdated with speed dial functionality to replace desktop icons. Firefox must use facebook to get apps and games by Adobe flash players with openGL.

Puppy has to change to browser operating system to use embedded design of circuits in ARM platforms. Website switching to i/o data from your computer. Wary is not browser switching operating system, and still using old PET packages(not 100,000 apps and games yet)? It will take sometime for Puppy to work with internet big data(backup) in the save feature before shutdown.

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#12 2012-07-01 11:04:32

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry Pi with facebook as an answering machine with video voice chat or text chat.

This is probably the only killer app that matters.

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#13 2012-07-03 07:12:06

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Almost all the ARM platform motherboards use microSD which is the same as SD cards by adapter. The maximum nand size is so far 32 gB with 256 mB of sram cache which is non-volitile.

The sram cache has to be cleverly used for /temp or ram disk. Which means file system of its own.

This has to become a standard of sorts. Ext2 is a safe bet, without write back fragmentations(i486 at best, no i586/i686 write back cpu feature).

As all distros try to put up arm platform, the microSD card hardware structure becomes more important for software storage and special swap file too.

This is the time to make strong convictions on data transfer paths. 1 gB of sram can be had in four microSD cards. How to do 4 way data transfer scheme is not easy unless a layered file system is used.

Due to smaller transistors and multigates in nand flash; the mtbf(mean time before failure) is greatly improved.

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#14 2012-07-04 13:48:00

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

The microSD issues are more involved than just file systems(ext2/3/4) used to put data in sram. There is a firmware that writes from sram to multigated flash transistor blocks. It will write when blocks are almost full Which means you will never be efficient when data is not in fixed compressed length.

Anyway, you look at it, The sram is the primary memory, and the flash is compressed data storage(database) when a block of data is accumulated. Don't even think of the compressed data unless you are working with squashfs in sram?

Then there are permanent data such as operating system(compressed) and never moved except copy to executable area(why if sram non-volitile). then there are swap files from internet which can be permanent and never moved. Sram then can be divided into 128mB, 16mB and 112 mB for operating system, execution area and swap memory. Some file system data will be compressed and used as such in flash memory, others stay in non-volitile sram.

From that analysis, The SD firmware will need some changes. Otherwise data can be stored in different memory file systems(compressed or not).

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#15 2012-07-04 13:59:43

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

So, we have been discussing a computer architecture that uses microSD only; no ddr memory to move data in and out. Why bother if sram in microSD is very fast.

Most of the older motherboard design still do ddr memory. And SD or MicroSD cards are just to store compressed data from ddr memory.

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#16 2012-07-12 08:52:50

atang1
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Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry Pi has ddr memory and USB bus. But the sound device has to be handled through USB bus not pci bus. So, the operating system needs script to work sound through USB 2.0 or better. Alsa config USB2.0?

This leads people to design motherboards with PCI bus, going back to IBMPC architecture just to use the old operating system.

Well the motherboards are now $129 instead of $29.

It shows that most Linux developers are self taught, and has yet to work with fundamentals of computer architecture different from IBMPC.

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#17 2012-07-14 09:14:45

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry pi depends on a concept that USB bus can improve the architecture of the motherboard. But, it needs a power supply on a hub that has bypass transistor for current overloads.

Now, USB sound cards(Debian blocks USB sound cards due to power supply constraints) can be supported for digital sound output. Analog sound came out of uarts. HDMI is video only. Sound is fed through USB sound chipset.

So, you can not have radio buttons to feed sound through HDMI or analog outputs(using cheat codes). Computers feed video through hdmi but sound through headphones. You have to change from headphones to other audio outputs using cable; and digital sound through USB sound card to speakers.

What this discussion is missing is how BCM2835 did the sound to the headphones? Mpeg4/h.264(mjpeg+MP3) to headphones? So, you need MP3 codec for cpu to process sound using DAC, pwm, etc. through analog headphones and hdmi video display.

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#18 2012-07-24 09:17:03

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Now that ARM can play MP3 tunes, you have to install USB soundcard to play alsa config tunes. this solves the lack of sound on Arm platforms. Its just music and voice is played by analog circuits. digital sound circuit needs additional sound chipset on USB.

The use of thumb(16 bit) and thumb2(32 bit) on arm firmware instruction set, require alignment of 4 bit codes to 8 bit codes. That is 8 bit ascii codes only used 4 bits data transfer. Normal 8 bit space can run two ascii codes in 4 bit space, thus alignment is needed not to be confused in i386 data transfer. So, if the kernel developers start to use the full power of Arm platform, thumb and thumb2 instructions can work in Linux i386 distros. So far, no one had full understanding at Linux foundation.

But it won't be too far fetched once 4 bits or 5 bits ascii codes are understood in a 8 bit ascii code world..

Footnote on ARM ascii codes:
Rockwell cpus on apple computers used to use 5 bits out of 8 bits for ascii code data transfer. Now ARM cpu can use 4 bit ascii codes in one register structure. This means i386 data transfer can be two 4 bit words at a time in parallel. Serial data has to be aligned to read two words in every 8 bit transfer.

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#19 2012-08-25 13:17:32

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry Pi had been exciting for a while. Now the design has been a problem with limited power on the usb bus. Many users are not prepared to use USB devices that are powered. And the motherboard lacked a amplifier to boost USB signals to many USB devices(load balancing).

This is a USB philosophy that has to be standardized someday, if you are going to support 127 USB devices from one bus. USB 1.0/2.0 drivers can be futile if they have to manage passive USB devices by supplying power. The drivers had to test all the USB devices hotplugged to make sure USB devies are not passive but powered. And USB data signal are upto standard.

Even flash cards had to be powered?

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#20 2012-12-01 08:13:39

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

New Raspberry Pi has more memory and is now made in England by Sony, Sales has improved not limited by production in China and Taiwan. But USB bus still lack power to support the many uSB ports.

Its an embedded solution and tasks had to be limited by software.People ofter use it for a single dedicated task.

To promote it as a desktop solution is wild. To promote it as a smartphone substitude on the desktop for cloud big data paperless society maybe more interesting. Anyway, people may buy them and left them wanting.

New ARM64 or ARMv8 schemes(2014) for RPi(currently armv6) maybe for big data data centers. It will do 32/64 bit tasks with data compression in ascii codes for transfer speed.

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#21 2013-03-08 07:25:38

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Raspberry Pi delivery delayed ? Magnetic ethernet jacks ? Future ?

Raspberry pi now has operating system that simulates the star trek tricorder.

It will spawn a whole lot of healthcare sensors such as blood oxygen tester using reflected light from LED. Blood oxygen level indirectly tests the fat and oil level in body fluid.

Blood pressure sensor will be another healthcare device for tricorder.

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