Hi, we are developing a board related to this.

 

Although the initiator has not replied yet you are free to look into the schematics here as we are prepared to manufacture it.

 

-----Original Message-----
From: Andrii Nakryiko [mailto:andrii.nakryiko@gmail.com]
Sent: Friday, July 30, 2010 8:35 PM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] Robostix for Overo

 

Hi!

 

Just wondered how is it going with Robostix for Overo. Can you provide

any information on status and when it will be released?

 

Thanks!

 

2010/6/16 Ash Charles <ash@gumstix.com>:

> Hi Nathaniel,

> 

> I've added in a PDF version of the schematic and board layout here:

> www.gumstix.net/other/

> 

> Looking further up this thread should give a more complete idea of the

> discussions that went on in selecting the board features:

> http://old.nabble.com/Robostix-for-Overo-td28600551.html

> 

> In brief:

> -> Cortex M3 micro

> -> GPIOs, PWMs, ADCs, CAN bus, SPI bus , I2C bus, and UARTs breakout

> -> 3-axis Accel, Magnetometer, and gyro (for now, the gyro part is not

> available for purchase)

> -> powered USB hub

> 

> HTH,

> -Ash

> 

> On Tue, Jun 15, 2010 at 7:41 PM, Nathaniel Delp <delpfeb@gmail.com> wrote:

>> Can you please detail a bit more about what the board does?

>> 

>> I do not have Eagle to view the boards with.

>> 

>> Thanks

>> 

>> On Jun 15, 2010, at 7:39 PM, Ash Charles wrote:

>> 

>>> Hi,

>>> 

>>> A preliminary schematic (http://www.gumstix.net/other/B30019.sch) and

>>> board design (http://www.gumstix.net/other/B30019.brd) for this

>>> Overo-robostix board are available in Eagle format.  As before, we

>>> welcome your feedback---it is really helpful to know what features are

>>> useful for users.

>>> 

>>> Hope you like it :).

>>> 

>>> -Ash

>>> 

>>> On Sat, May 22, 2010 at 8:56 AM, Dave Hylands <dhylands@gmail.com>

>>> wrote:

>>>> Hi Ash,

>>>> 

>>>> On Sat, May 22, 2010 at 12:40 AM, Ash Charles

>>>> <ashcharles@gmail.com> wrote:

>>>>> On Fri, May 21, 2010 at 6:40 PM, Dave Hylands <dhylands@gmail.com>

>>>>> wrote:

>>>>>> Hi Ash,

>>>>>> 

>>>>>> On Fri, May 21, 2010 at 5:01 PM, Ash Charles <ash@gumstix.com>

>>>>>> wrote:

>>>>>>> Afternoon,

>>>>>>> 

>>>>>>> We've looked through the pin-muxing for this board and we

>>>>>>> propose the

>>>>>>> following 3 by 8 pin right-angle 0.1"pitch male headers:

>>>>>>> 

>>>>>>> =====HEADER #1=====

>>>>>>> PWM0  PWM1  PWM2  PWM3  PWM4  PWM5  PWM6  PWM7

>>>>>>> Vbat     Vbat     Vbat     Vbat     Vbat     Vbat     Vbat

>>>>>>> Vbat

>>>>>>> GND     GND     GND    GND     GND     GND    GND     GND

>>>>>> 

>>>>>> Hopefully, these will be Vmotor, which is jumpered to Vbat.

>>>>> To make sure I understand what you meant in your previous post, the

>>>>> jumper on the Robostix allowed people to use either a battery or a

>>>>> wall wart to supply power to the board?

>>>>> For the new board, the 'Vbat' signal (definitely a misnomer on my

>>>>> part) would be the V+ line taken directly from the power source be

>>>>> it

>>>>> a wall wart or a battery.

>>>> 

>>>> I guess by battery you really mean a dedicated 2-pin power connector.

>>>> 

>>>>>> How will the luminary micro be programmed? Will a JTAG interface

>>>>>> be available?

>>>>> I hadn't included the JTAG interface; I think this requires an

>>>>> additional four pins which is not impossible but board space would

>>>>> start to get tight.  One option would be putting contact pads for

>>>>> JTAG...does this seem useful?

>>>>> The device can be accessed via I2C0, UART0, or SSI0.

>>>> 

>>>> I just wanted to make sure that you address how the device will be

>>>> programmed. I see that it does indeed have a ROM based bootloader

>>>> which can be programmed as you indicated, which somewhat alleviates

>>>> the need for a JTAG.

>>>> 

>>>> Although having the JTAG allows a debugger to be used, which I think

>>>> will be important.

>>>> 

>>>> If you put the pads somewhere that a 10-pin JTAG mini connector

>>>> could be used

>>>> <http://www.luminarymicro.com/products/mdl-ada2.html> This could be a

>>>> surface mount connector. It looks like its a 2x5 0.050" header (see

>>>> the schematics and BOM for this eval board:

>>>> <http://www.luminarymicro.com/index.php?option=com_remository&func=download&id=983&chk=d1a772ed2075b69e938af114b279083b&Itemid=591

>>>> >

>>>> 

>>>>>>> Secondly: is the arrangement of pins correct?

>>>>>>>  -- on Header #2, should the UARTS be four pins each (RX, V+, TX,

>>>>>>> GND) with all three stacked on top of each other? e.g.

>>>>>>> RX0  5V   TX0   GND

>>>>>>> RX1  5V   TX1   GND

>>>>>>> RX2  5V   TX2   GND

>>>>>> 

>>>>>> The Arduino stuff seems to have standardized on using:

>>>>>> the same pinout as the FTDI USB-to-logic level serial connectors

>>>>>> which is

>>>>>> 

>>>>>> 1 - GND

>>>>>> 2 - CTS

>>>>>> 3 - VCC

>>>>>> 4 - TXD

>>>>>> 5 - RXD

>>>>>> 6 - RTS

>>>>>> 

>>>>>> <http://www.ftdichip.com/Products/EvaluationKits/TTL-232R-3V3.htm>

>>>>>> 

>>>>>> On the Arduino, the RTS pin is tied into the reset circuitry so

>>>>>> that

>>>>>> the board can be reset (and serial downloaded to) from the host.

>>>>>> 

>>>>>> Having the 4 pin layout which is compatible with the robostix also

>>>>>> makes sense. I just wanted to throw out the Arduino thing since

>>>>>> it's

>>>>>> quite popular.

>>>>> Thanks for pointing out the Arduino connector; I'd been hunting

>>>>> around

>>>>> to see if there was such a standard earlier today and hadn't found

>>>>> anything.

>>>>> Is there a strong motivation for including the CTS and RTS lines?  I

>>>>> don't recall using them before so I found it hard to justify extra

>>>>> pins but perhaps this is more a reflection on my inexperience than

>>>>> on

>>>>> the utility of these pins.

>>>> 

>>>> Being able to reset the microcontroller through the download

>>>> interface

>>>> is nice. It means that the SW can do the reset and send the

>>>> appropriate bytes with appropriate timings, rather than relying on a

>>>> particular sequence of events by the user.

>>>> 

>>>> Although looking at the protocol, it seems pretty easy to just start

>>>> the host side program and then hit reset on the micro. So I think you

>>>> could eliminate the extra lines if you need the space.

>>>> 

>>>> It would be nice, especially in standalone mode to be able to connect

>>>> up the FTDI chip normally used for the overo console to the micro,

>>>> perhaps using some switches, or DNI resistors.

>>>> 

>>>> --

>>>> Dave Hylands

>>>> Shuswap, BC, Canada

>>>> http://www.DaveHylands.com/

>>>> 

>>>> ------------------------------------------------------------------------------

>>>> 

>>>> _______________________________________________

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>>>> gumstix-users@lists.sourceforge.net

>>>> https://lists.sourceforge.net/lists/listinfo/gumstix-users

>>>> 

>>> 

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>> 

>> 

>> ------------------------------------------------------------------------------

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>> 

> 

> ------------------------------------------------------------------------------

> ThinkGeek and WIRED's GeekDad team up for the Ultimate

> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the

> lucky parental unit.  See the prize list and enter to win:

> http://p.sf.net/sfu/thinkgeek-promo

> _______________________________________________

> gumstix-users mailing list

> gumstix-users@lists.sourceforge.net

> https://lists.sourceforge.net/lists/listinfo/gumstix-users

> 

 

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