From: Colin S. <cj...@ab...> - 2008-11-26 14:41:39
|
> Date: Sat, 22 Nov 2008 09:15:34 -0800 > From: Gordon Kruberg <go...@gu...> > Subject: Re: [Gumstix-users] Overo and robotics > To: "General mailing list for gumstix users." > <gum...@li...> > Message-ID: <76F...@gu...> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes > > As we work on the design for an Overo-compatible robot expansion > board, it would be very helpful to know more detail. > > As we currently contemplate the board, currently unnamed, it does not > have an additional processor on it (but we could do so). > We suspect that we need all of the PWM, A/D, UART, SPI, GPIO, in > addition to the audio lines and USB-OTG of the Summit board. > > The biggest question is about power levels. We suspect that 1.8V > logic on the PWM is not adequate and are looking at 5V. > A/D would be standard TPS65950 input for ADC2-7 (2.5V) > SPI,UART,I2C make sense at 3.3V... > > Question for all PWM users-- would 3.3V be OK? Or would 5V logic be > better? Or keep them different? > Gordon, I would definately find 5V very useful. We've had countless issues trying to interface various sensors, I2C devices and motor controllers which all expected to work at 5V with the Gumstix using breakout-gs/vx boards in our robots. A simple board for the Overo which gets as many things as possible to 5V levels would be very helpful. Colin. -- Colin Sauze PhD Student, Intelligent Robotics Group Department of Computer Science Aberystwyth University SY23 3DB, United Kingdom http://users.aber.ac.uk/cjs06 |
From: blunce <bru...@co...> - 2008-12-01 01:04:05
|
It would be nice to simply have an MCU-less breakout board with "regular" voltage levels on headers (3.3V or 5V) for those (like me) who already have an auxiliary processor. As long as I have access to digital serial comms to my board, I'm not sure I would need the OMAP GPIO. I'll use the Overo as the application proc. The 3.3V or 5V choice is tough! How about a jumper select? I mostly see 5V devices. If the omap is 5V tolerant (doubtful) then go with 3.3V. It would be pretty cool to include a nice DC-DC converter on the expansion board to feed the usual external circuitry, sensors etc (5V,3.3V at a couple amps ). Wide voltage input (4-17 like you said is great). A lot of us use the 7.2V RC batteries. Gordon Kruberg wrote: > > As we work on the design for an Overo-compatible robot expansion > board, it would be very helpful to know more detail. > > As we currently contemplate the board, currently unnamed, it does not > have an additional processor on it (but we could do so). > We suspect that we need all of the PWM, A/D, UART, SPI, GPIO, in > addition to the audio lines and USB-OTG of the Summit board. > > The biggest question is about power levels. We suspect that 1.8V > logic on the PWM is not adequate and are looking at 5V. > A/D would be standard TPS65950 input for ADC2-7 (2.5V) > SPI,UART,I2C make sense at 3.3V... > > Question for all PWM users-- would 3.3V be OK? Or would 5V logic be > better? Or keep them different? > > What about V_in range of (approximately) 4V - 17V? > > Thanks for any and all feedback. > > Gordon > > > > >> Hi, >> >> I am currently using Gumstix Connex and Robostix in my robots, and I >> am very interested in using the new Overo motherboard, because it >> provides more power, floating point capabilities A/D inputs and PWM >> outputs. > > W. Gordon Kruberg, M.D. > President and C.E.O., > Gumstix, Inc. > > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the > world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > -- View this message in context: http://www.nabble.com/Overo-and-robotics-tp20636287p20704818.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Bill G. <bg...@bi...> - 2008-12-01 04:19:59
|
blunce wrote: > It would be nice to simply have an MCU-less breakout board with "regular" > voltage levels on headers (3.3V or 5V) for those (like me) who already have > an auxiliary processor. As long as I have access to digital serial comms to > my board, I'm not sure I would need the OMAP GPIO. I'll use the Overo as the > application proc. The 3.3V or 5V choice is tough! How about a jumper select? Actually, that's very do-able. At least it's working for me. ;) The TXB0104 level converter chip can do a pretty nice range of voltages on both sides, You could leave VCCA at the OMAP's nominal 1.8V, and then feed the VCCB side with 1.8V, 3.3V, 5V, or whatever else you wanted it to convert to. If your board had 3.3V and 5V references, then a little jumper is all you would need... b.g. -- Bill Gatliff bg...@bi... |
From: Sergey L. <luk...@gm...> - 2009-10-08 14:08:13
|
Hi Gordon, Are you still working on the Overo-compatible robot expansion board? It has been almost a year since you posted this message. Is the project abandoned? It would be nice to see such board. Kind regards, Sergey As we work on the design for an Overo-compatible robot expansion > board, it would be very helpful to know more detail. > > As we currently contemplate the board, currently unnamed, it does not > have an additional processor on it (but we could do so). > We suspect that we need all of the PWM, A/D, UART, SPI, GPIO, in > addition to the audio lines and USB-OTG of the Summit board. > > The biggest question is about power levels. We suspect that 1.8V > logic on the PWM is not adequate and are looking at 5V. > A/D would be standard TPS65950 input for ADC2-7 (2.5V) > SPI,UART,I2C make sense at 3.3V... > > Question for all PWM users-- would 3.3V be OK? Or would 5V logic be > better? Or keep them different? > > What about V_in range of (approximately) 4V - 17V? > > Thanks for any and all feedback. > > Gordon > > > > > > Hi, > > > > I am currently using Gumstix Connex and Robostix in my robots, and I > > am very interested in using the new Overo motherboard, because it > > provides more power, floating point capabilities A/D inputs and PWM > > outputs. > > > > The summit expansion board can be used in a robot, but it is not very > > well suited to the task. It is like using a breakout board for a > > Gumstix. One has to use additional circuits, on other cards, to > > satisfy basic needs, like driving a servo, or reading an analog > > sensor. The Robostix expansion is there for that, and an equivalent > > for the Overo would be welcomed. > > > > I understand that expansion boards are being developed and are not yet > > announced, so an expansion board designed for hobby robotics might be > > on Gumstix's roadmap, in which case this mail can be ignored. But if > > it isn't, then I hope that this mail may help Gumstix consider such a > > board. > > > > What I would like changed compared to the Robostix: > > > > - the ability to stack it on top of a custom board is currently > > limited by the layout of the Robostix's I/O and power pins. Those pins > > are almost regularly 0.1" spaced, so that an headerless Robostix can > > almost be plugged on a breadboard or prototype board. The "almost" is > > what I would like changed. Between the GPIO banks and the A/D banks, > > there is a space that is not a multiple of 0.1". Similar things can be > > seen on the other side. It would be nice to have a board with 3-ranked > > 0.1" spaced headers on one side (for GPIO, A/D, PWM...), and 2-ranked, > > 0.1" spaced headers on the other side (for Serial, power, ISP...). An > > headerless version of the board (with headers soldered towards the > > bottom of the board) could then easily be stacked on top of a > > breadboard, and custom boards could easily be designed to expand the > > capabilities of such a board (add H-bridges for motors, power > > regulators for 12V to 5V conversion, etc...). > > > > - the ATmega128 on the Robostix is powerful, but maybe it could be > > replaced by an XMEGA. They provides high speed UART, more A/D lines > > and PWM lines and can run at 32 MHz. > > > > - the I2C link between the Gumstix and the Robostix is sometimes a > > little too slow. It would be nice if it could run to 1MHz, or maybe > > replaced by an high-speed UART or SPI (it depends and the OMAP > > capabilities on this matter obviously, and I don't know them very > > well). > > > > > > I wrote this mail because I think that expressing one's needs is one > > good way to help Gumstix know what we need. > > > > I am looking forward to seeing Gumstix's future products: thank you > > guys, they are very often awesome. > > > > Thanks for reading. > > > > -- > > > > Thierry Genovese > > > > ------------------------------------------------------------------------- > > This SF.Net email is sponsored by the Moblin Your Move Developer's > > challenge > > Build the coolest Linux based applications with Moblin SDK & win > > great prizes > > Grand prize is a trip for two to an Open Source event anywhere in > > the world > > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > W. Gordon Kruberg, M.D. > President and C.E.O., > Gumstix, Inc. > > > > > -- > View this message in context: > http://www.nabble.com/Overo-and-robotics-tp20636287p25802988.html > Sent from the Gumstix mailing list archive at Nabble.com. > > > > |
From: Gordon K. <go...@gu...> - 2009-10-09 17:40:58
|
Sergey -- We are just about to announce a series of boards including one for use in a DIP-like situation that I think addresses your need. We did make one decision that makes this board look more like a breakout than a robostix: we did not put a slave processor on it. We chose to expose the A/D and PWM directly from the Overo. Do you believe we will need another board with a slave processor on it? Thanks, Gordon > Hi Gordon, > > Are you still working on the Overo-compatible robot expansion > board? It has been almost a year since you posted this message. > Is the project abandoned? > It would be nice to see such board. > > Kind regards, > > Sergey > > As we work on the design for an Overo-compatible robot expansion > board, it would be very helpful to know more detail. > > As we currently contemplate the board, currently unnamed, it does not > have an additional processor on it (but we could do so). > We suspect that we need all of the PWM, A/D, UART, SPI, GPIO, in > addition to the audio lines and USB-OTG of the Summit board. > > The biggest question is about power levels. We suspect that 1.8V > logic on the PWM is not adequate and are looking at 5V. > A/D would be standard TPS65950 input for ADC2-7 (2.5V) > SPI,UART,I2C make sense at 3.3V... > > Question for all PWM users-- would 3.3V be OK? Or would 5V logic be > better? Or keep them different? > > What about V_in range of (approximately) 4V - 17V? > > Thanks for any and all feedback. > > Gordon > > > > > > Hi, > > > > I am currently using Gumstix Connex and Robostix in my robots, and I > > am very interested in using the new Overo motherboard, because it > > provides more power, floating point capabilities A/D inputs and PWM > > outputs. > > > > The summit expansion board can be used in a robot, but it is not very > > well suited to the task. It is like using a breakout board for a > > Gumstix. One has to use additional circuits, on other cards, to > > satisfy basic needs, like driving a servo, or reading an analog > > sensor. The Robostix expansion is there for that, and an equivalent > > for the Overo would be welcomed. > > > > I understand that expansion boards are being developed and are > not yet > > announced, so an expansion board designed for hobby robotics might be > > on Gumstix's roadmap, in which case this mail can be ignored. But if > > it isn't, then I hope that this mail may help Gumstix consider such a > > board. > > > > What I would like changed compared to the Robostix: > > > > - the ability to stack it on top of a custom board is currently > > limited by the layout of the Robostix's I/O and power pins. Those > pins > > are almost regularly 0.1" spaced, so that an headerless Robostix can > > almost be plugged on a breadboard or prototype board. The "almost" is > > what I would like changed. Between the GPIO banks and the A/D banks, > > there is a space that is not a multiple of 0.1". Similar things > can be > > seen on the other side. It would be nice to have a board with > 3-ranked > > 0.1" spaced headers on one side (for GPIO, A/D, PWM...), and > 2-ranked, > > 0.1" spaced headers on the other side (for Serial, power, ISP...). An > > headerless version of the board (with headers soldered towards the > > bottom of the board) could then easily be stacked on top of a > > breadboard, and custom boards could easily be designed to expand the > > capabilities of such a board (add H-bridges for motors, power > > regulators for 12V to 5V conversion, etc...). > > > > - the ATmega128 on the Robostix is powerful, but maybe it could be > > replaced by an XMEGA. They provides high speed UART, more A/D lines > > and PWM lines and can run at 32 MHz. > > > > - the I2C link between the Gumstix and the Robostix is sometimes a > > little too slow. It would be nice if it could run to 1MHz, or maybe > > replaced by an high-speed UART or SPI (it depends and the OMAP > > capabilities on this matter obviously, and I don't know them very > > well). > > > > > > I wrote this mail because I think that expressing one's needs is one > > good way to help Gumstix know what we need. > > > > I am looking forward to seeing Gumstix's future products: thank you > > guys, they are very often awesome. > > > > Thanks for reading. > > > > -- > > > > Thierry Genovese > > > > > ------------------------------------------------------------------------- > > This SF.Net email is sponsored by the Moblin Your Move Developer's > > challenge > > Build the coolest Linux based applications with Moblin SDK & win > > great prizes > > Grand prize is a trip for two to an Open Source event anywhere in > > the world > > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > <http://moblin-contest.org/redirect.php?banner_id=100&url=/> > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > <mailto:gum...@li...> > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > W. Gordon Kruberg, M.D. > President and C.E.O., > Gumstix, Inc. > > > > > -- > View this message in context: > http://www.nabble.com/Overo-and-robotics-tp20636287p25802988.html > Sent from the Gumstix mailing list archive at Nabble.com. > > > > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry(R) Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference > > > ------------------------------------------------------------------------ > > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Sergey L. <luk...@gm...> - 2009-10-09 18:53:31
|
Hi Gordon, Slave processor is not needed at all. I would need the follwing: - 1 or 2 I2C - 2-3 UART - 1 or 2 SPI - 2-3 USB working at +3.3 and/or +5V - normal PWM lines (+5V) (as I understand OMAP has only 4 lines but this should be enough) + 4-10 GPIO also at normal voltage (+5V) Ideally I want to connect this board to RC receiver and servos of my RC Helicopter directly I2C, SPI and Serials will be used to connect sensor boards and normally they are working at 3.3 - 5 volts Kind regards, Sergey On Fri, Oct 9, 2009 at 7:40 PM, Gordon Kruberg <go...@gu...> wrote: > Sergey -- > > We are just about to announce a series of boards including one for use > in a DIP-like situation that I think addresses your need. > > We did make one decision that makes this board look more like a breakout > than a robostix: we did not put a slave processor on it. We chose to > expose the A/D and PWM directly from the Overo. > > Do you believe we will need another board with a slave processor on it? > > Thanks, > > Gordon > > > > > Hi Gordon, > > > > Are you still working on the Overo-compatible robot expansion > > board? It has been almost a year since you posted this message. > > Is the project abandoned? > > It would be nice to see such board. > > > > Kind regards, > > > > Sergey > > > > As we work on the design for an Overo-compatible robot expansion > > board, it would be very helpful to know more detail. > > > > As we currently contemplate the board, currently unnamed, it does not > > have an additional processor on it (but we could do so). > > We suspect that we need all of the PWM, A/D, UART, SPI, GPIO, in > > addition to the audio lines and USB-OTG of the Summit board. > > > > The biggest question is about power levels. We suspect that 1.8V > > logic on the PWM is not adequate and are looking at 5V. > > A/D would be standard TPS65950 input for ADC2-7 (2.5V) > > SPI,UART,I2C make sense at 3.3V... > > > > Question for all PWM users-- would 3.3V be OK? Or would 5V logic be > > better? Or keep them different? > > > > What about V_in range of (approximately) 4V - 17V? > > > > Thanks for any and all feedback. > > > > Gordon > > > > > > > > > > > Hi, > > > > > > I am currently using Gumstix Connex and Robostix in my robots, and > I > > > am very interested in using the new Overo motherboard, because it > > > provides more power, floating point capabilities A/D inputs and > PWM > > > outputs. > > > > > > The summit expansion board can be used in a robot, but it is not > very > > > well suited to the task. It is like using a breakout board for a > > > Gumstix. One has to use additional circuits, on other cards, to > > > satisfy basic needs, like driving a servo, or reading an analog > > > sensor. The Robostix expansion is there for that, and an > equivalent > > > for the Overo would be welcomed. > > > > > > I understand that expansion boards are being developed and are > > not yet > > > announced, so an expansion board designed for hobby robotics might > be > > > on Gumstix's roadmap, in which case this mail can be ignored. But > if > > > it isn't, then I hope that this mail may help Gumstix consider > such a > > > board. > > > > > > What I would like changed compared to the Robostix: > > > > > > - the ability to stack it on top of a custom board is currently > > > limited by the layout of the Robostix's I/O and power pins. Those > > pins > > > are almost regularly 0.1" spaced, so that an headerless Robostix > can > > > almost be plugged on a breadboard or prototype board. The "almost" > is > > > what I would like changed. Between the GPIO banks and the A/D > banks, > > > there is a space that is not a multiple of 0.1". Similar things > > can be > > > seen on the other side. It would be nice to have a board with > > 3-ranked > > > 0.1" spaced headers on one side (for GPIO, A/D, PWM...), and > > 2-ranked, > > > 0.1" spaced headers on the other side (for Serial, power, ISP...). > An > > > headerless version of the board (with headers soldered towards the > > > bottom of the board) could then easily be stacked on top of a > > > breadboard, and custom boards could easily be designed to expand > the > > > capabilities of such a board (add H-bridges for motors, power > > > regulators for 12V to 5V conversion, etc...). > > > > > > - the ATmega128 on the Robostix is powerful, but maybe it could be > > > replaced by an XMEGA. They provides high speed UART, more A/D > lines > > > and PWM lines and can run at 32 MHz. > > > > > > - the I2C link between the Gumstix and the Robostix is sometimes a > > > little too slow. It would be nice if it could run to 1MHz, or > maybe > > > replaced by an high-speed UART or SPI (it depends and the OMAP > > > capabilities on this matter obviously, and I don't know them very > > > well). > > > > > > > > > I wrote this mail because I think that expressing one's needs is > one > > > good way to help Gumstix know what we need. > > > > > > I am looking forward to seeing Gumstix's future products: thank > you > > > guys, they are very often awesome. > > > > > > Thanks for reading. > > > > > > -- > > > > > > Thierry Genovese > > > > > > > > > ------------------------------------------------------------------------- > > > This SF.Net email is sponsored by the Moblin Your Move Developer's > > > challenge > > > Build the coolest Linux based applications with Moblin SDK & win > > > great prizes > > > Grand prize is a trip for two to an Open Source event anywhere in > > > the world > > > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > <http://moblin-contest.org/redirect.php?banner_id=100&url=/> > > > _______________________________________________ > > > gumstix-users mailing list > > > gum...@li... > > <mailto:gum...@li...> > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > W. Gordon Kruberg, M.D. > > President and C.E.O., > > Gumstix, Inc. > > > > > > > > > > -- > > View this message in context: > > http://www.nabble.com/Overo-and-robotics-tp20636287p25802988.html > > Sent from the Gumstix mailing list archive at Nabble.com. > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > ------------------------------------------------------------------------------ > > Come build with us! The BlackBerry(R) Developer Conference in SF, CA > > is the only developer event you need to attend this year. Jumpstart your > > developing skills, take BlackBerry mobile applications to market and stay > > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > > http://p.sf.net/sfu/devconference > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry(R) Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > -- Media Center for TomTom - a unique video player from MobilNova.com Be the first to watch ! http://www.MobilNova.com/ |