project-ars1 - ARS Technologies
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1. Project ARS adding to the proposal of Google s project Ara covering separate areas rev 1 0 June 09 2014 ARS Technologies www arstech com to contact us submit notes comments feedback http arstech com install cms contact COREseo html info arstech com Table of content Introduction Mechanical Electrical System software added components System software implementation for proposed interfaces Call for action References NYDN BWN 1 The current project ARS response to Google s Both projects Introduction proposal was specii project Ara fically created in nables devices like smartphones to be able to connect with external hardware What are the major di while project ars and any other types of tablets mechanically the connectors in project the connect project ara uses standard mass prod s on a system level MIPI M PHY and UniPro pro project ara t ara tors in targets specil embraces any type of project ara tocols fferences in the proposals devices for connecting are located on the back of project ars uses custom 10pin connector uced connectors uses LVDS level signals project ars while fically smartphones device smatrphones external hardware a device are located at the edjes while project ars from uses interfaces available on the2. SOC and wires them directly to connectors broadly del ara ability of 2 Mechanical A device maker From the point or redesigning smartphone dollars to design their device s OL of view of fined and unclear system sof versus deployed and working software f existing and older systems in tablet etc a devic maker designing of an existing device to compete in ftware in allowing upgrade project ars did invest millions of project f a new device the the same market as the existing devices is most likely a non starter On the other hand small changes to the existing designs will be much easier to implement and achieve The existing designs of connectors on the edges of The proposal calls the devices as well edges of for placing of smartphones and tablets place i o these devices additional connectors on the pic l tablet phone connectors In such case there will be minimal design modifications e modifying of the pe board to add connectors and wiring e modifying of the enclosure making openings for connectors 3 Electrical A user may want to connect to a device e variety of sensors temperature acceleration magnetic field gyro etc most of these are based on I2C interface and some on SPI interface chips based on a parallel bus which include addre
3. erfaces in a SOC is essential to a hardware and system software developer SOC user s manual technical reference manual application notes have to be made available for free We are grateful to the chip makers like Samsung TI NVIDIA etc who have already done this We call to all other chip makers to do the same xxx in attn to Google and device makers Root access is available by default on all desktop notebook OS es Windows Linux Mac OS x but is disabled by default on all phone tablet OS es A hardware and system software developer has to go to the hacker community to enable a device to have root access in order to be able to develop and test The user of a hardware enabled device has to do the same go to the hacker community to enable a device to have root access We call to Google and device makers to provide root access on all hardwar nabled devices 7 References ArsReqRw https lay google com store apps details id com arstech arsregrw google store app http arstech com install ecom prodshow arsregrw html product page http arstech com install cms display arsregrw html details on use LDBBK http arstech com install ecom prodshow ld bbk html product page Http arstech com install oms display ste ld bbk html details on use PCI Express based interfacing products http www arstech com insta cms di
4. kes requests from multiple apps and returns replies back to apps implements new capabilities not present on current OS level Important pre requisites for a device to be able to is to have root access privileges and information on the SOC and additional components One example of a software engine android app is gt ArsRegRw REECEOS lay google com store apps details id com arstech arsregrw The software engine gives this app the extremely powerful capability to read write individual registers in the whole memory space of an ARM SOC 4 2 linux driver binary builder kit ldbbk Android runs on top of Linux kernel which is not friendly at all to loadable modules drivers A driver built on one kernel release can not load on another kernel or even on the same kernel if there is some difference in the system hardware To overcome this we have ldbbk component which allows a pre built driver binary to load and run on a wide variety of kernels and system hardware For details please refer to http farstech com install oms display ste 1d bbk html 5 System software implementation for proposed interfaces 5 1 I2C interface Current kernels include i2c driver The software engine component has to open and communicate with the standard driver and then service requests from apps If the device manufacturer forgot to include i2c driver i
5. lacing it on a device like for ex mouser com part number 656 dd1b030val The proposed pin assignment 1 GND Le See 3 GPIOO 28 GPIOZ5 29s 33V 30 GND pic 7 8 30pin connectors and possible implementations through a cable connector or directly mounting to a pc board A user can utilize a device enable in the above way by using a cable or directly a pc board 4 System software added components The chapter makes the assumption that the device will run Google s Android operating system To assist with adding a new hardware we are providing 2 components software engine e linux driver binary builder kit ldbbk 4 1 Software engine After a device is manufactured rarely is the kernel and operating system updated In most cases the devices carry the same kernel os during the lifetime of the device Adding external hardware or upgrading under Google Android operating system is very difficult An app which wants to use the new hardware connected can not directly access it The way Google has been responding is to add a specific API in the next OS release This leaves existing devices not covered In addition it may take months or years until the needed API is present on the majority of devices We did add a software engine component which runs independently of the Android OS level communicates with system and kernel levels ta
6. m part number 649 10029449 001RLF pic 4 tablet with hdmi connector The proposed pin assignment 1 PERST pci express reset 2 GND Sa Oe oe 4 CLKN clock pair negative 5 GND 6 CLKP clock pair positive 7 TXN transmit pair negative 8 GND 9 TXP transmit pair positive 10 RXN receive pair negative 11 GND 12 RXP receive pair positive 13 3 3v 14 3 3v Le 33y 16 3 3v 17 18 WO A user can utilize a device enabled in the above way by using a cable to connect to PCI cards xo0ic 5 a tablet HDMI con a cable xprs pci x3 3 PCI cards The above image shows real products For details please check ch 7 References Another example of utilizing a device enabled in the above way by using a cable to connect to PCI Express x16 card pic 6 a tablet HDMI con a cable xprs px x16 PCI Express x16 card The above image shows real products For details please check ch 7 References There are links provided shoving way of connecting an ExpressCard card and a Compact PCI Express PXI Express card 3 2 Adding GPIO interface By adding a connector with GPIO pins the user can handle the following cases e chips based on a parallel bus which include address lines data lines 8 16bit and control lines e general I O interface providing digital inputs and outputs We propose selecting a 30pin connector and p
7. n the kernel a binary module has to be built This binary will be adjusted by ldbbk then loaded and used by the software engine component 5 2 PCI Express interface A PCI Express type device has normally a driver A binary of the driver has to be built This binary will be adjusted by ldbbk and then loaded and used by the OS The software engine component may not be needed if an app does not touches directly the PCI Express hardware PCT Express is normally a feature of x86 based systems and a new option on ARM based systems A system software has to be ported dealing with enumeration hot plug assigning resources 5 3 GPIO interface The GPIO interface may be included in the software engine component and serviced directly from user level One of the tutorial examples included in ArsRegRw android app gt https play google com store apps details id com arstech arsregrw is dealing with the GPIO pins of a Texas Instruments ARM SOC and a Samsung ARM SOC 6 Call for action xxx in attn to phone tablet device manufacturers Small changes in the existing designs adding connectors wiring modifying enclosure will open the devices to be able to add new hardware If work starts right away new hardware enabled devices can be available in the time span of weeks or months in attn to SOC chip makers Documentation of the memory map registers devices int
8. ontact COREseo html info arstech com
9. splay ste use xprs px x1 html z for a PCI Express X1 card http www arstech com install cms display ste use xprs px x16 html for a PCI Express X1 X16 card http www arstech com install cms display ste use xprs ec html for an ExpressCard card http www arstech com install cms display ste use xpre cpecie html for a Compact PCI Express PXI Express card To view connectors go to mouser com enter part number click on data sheet connectors for I2C interface mouser com part number description manufacturer 538 47491 0001 usb micro b mid mnt Molex 538 47346 0001 usb micro b bot mnt 538 47589 0001 usb micro ab bot mnt 538 47590 0001 usb micro ab top mnt connectors for PCI Express interface mouser com part number description manufacturer 649 10029449 001r1f hdmi recept smt fci 806 kdmix nsl ns b hdmi rec type a smt kycon 806 kdmix ns2 ns b hdmi rec type a th ra 154 10428 e hdmi rec r a smt kobiconn 154 10405 e hdmi rec r a smt 154 10412 e hdmi rec r a smt connectors for GPIO interface mouser com part number description manufacturer 656 dd1b030val 30pin 0 5mm con plug JAE Electronics 656 dd1b030ha1r500 30pin 0 5mm con plug 656 dd1r030ha1lr1300 30pin 0 5mm con receptacle 656 dd1p030mal 30pin 0 5mm con cable plug to contact us submit notes comments feedback http arstech com install cms c
10. ss lines data lines 8 16bit and control lines standard PCI Express and equivalent based peripheral cards including ExpressCard Compact PCI Express PXI Express etc general I O interface providing digital inputs and outputs Regarding powering we propose using a standard and regulated voltage level gt 3 3v The following are the one by one look at the initially proposed interfaces 3 1 Adding I2C interface I propose placing a mini usb a b connector or micro usb a b connector like for ex mouser com part number 538 47491 0001 pic 2 phone with usb micro a b connector The proposed pin assignment Le 3 3V 2 gnd 3 SCL i2c clock 4 SDA i2c data To implement the proposal a device maker has to modify the pc board add wiring and modify the enclosure Most if not all of ARM SOC include on chip i2c controller A user can utilize a device enable in the above way by using for example a gender changer which then goes to a pc board pic 3 possible implementation with usb con gender changer pc board 3 2 Adding PCI Express interface PCI Express interface is available only on some SOCs Most likely such chips will be placed mostly on tablets One example of an ARM SOC which includes the PCI Express interface NVIDIA Tegra 3 HD Mobile Processors T30 Series AP30 Series We popose placing a hdmi connector like for ex mouser co
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