From: David Pérez-P. L. <dp...@gt...> - 2008-07-31 12:06:09
|
Hi all, Could anyone help me with information about the power conections of the breakout-vx? I want to power the breakout from other board. Is it possible to give it 5 volts through the VBATT pin instead of using the plug connection? I have tried this, but the rest of Vcc pins does not show any power at all. I have looked at the schematic/board, and I guess this could be done. However, the Gumstix connector is showing 5 volts in 3 pins (I think they are pins # 30, 31 and 32, but don't remember exactly). Gumstix needs just 3.3 volts... Is this ok? Thanks in advance, David |
From: Dave H. <dhy...@gm...> - 2008-07-31 14:06:38
|
Hi David, > Could anyone help me with information about the power conections of the > breakout-vx? I want to power the breakout from other board. Is it possible > to give it 5 volts through the VBATT pin instead of using the plug > connection? I have tried this, but the rest of Vcc pins does not show any > power at all. That's odd. You need to make sure that the power plug is physically removed, since plugging in the power adapter will disconnect the VBATT connector. > I have looked at the schematic/board, and I guess this could be done. > However, the Gumstix connector is showing 5 volts in 3 pins (I think they > are pins # 30, 31 and 32, but don't remember exactly). Gumstix needs just > 3.3 volts... Is this ok? Providing 5v on VBATT should be fine, although 4v is recommended. The gumstix has its own voltage regulators which take VBATT and convert it to 3.3v, so VBATT needs to be a bit higher than 3.3v (like around 3.7v IIRC) So you're saying that if you use a power adpater you get 3.3v on the Vcc pins, but when you use VBATT you don't? Sounds fishy. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: David Pérez-P. L. <dp...@gt...> - 2008-07-31 14:53:08
|
Thanks for the info: I didn't remember that Gumstix has its own voltage regulators. So, this means I should give Gumstix some power between 3.7 and 5 volts (max.)? > So you're saying that if you use a power adpater you get 3.3v on the Vcc pins, but when you use VBATT you don't? Sounds fishy. Not exactly. I have not tried the power adapter plug; I just connected 5 volts to the VBATT pin, and the other pins in that row labeled with VCC don't get any power. However, IC's in the breakout get 5 volts, and I measure also 3.3 volts (I guess it is the 3232 output). Perhaps the missing voltages at the VCC pins means that the Gumstix must be attached to its connector for these pins to get the power? I have not tried this yet, as I'm checking power first. I'm just trying not to fry the Gumstix :) Thanks! -----Mensaje original----- De: gum...@li... [mailto:gum...@li...] En nombre de Dave Hylands Enviado el: jueves, 31 de julio de 2008 16:07 Para: General mailing list for gumstix users. Asunto: Re: [Gumstix-users] Breakout-vx power input Hi David, > Could anyone help me with information about the power conections of > the breakout-vx? I want to power the breakout from other board. Is it > possible to give it 5 volts through the VBATT pin instead of using the > plug connection? I have tried this, but the rest of Vcc pins does not > show any power at all. That's odd. You need to make sure that the power plug is physically removed, since plugging in the power adapter will disconnect the VBATT connector. > I have looked at the schematic/board, and I guess this could be done. > However, the Gumstix connector is showing 5 volts in 3 pins (I think > they are pins # 30, 31 and 32, but don't remember exactly). Gumstix > needs just > 3.3 volts... Is this ok? Providing 5v on VBATT should be fine, although 4v is recommended. The gumstix has its own voltage regulators which take VBATT and convert it to 3.3v, so VBATT needs to be a bit higher than 3.3v (like around 3.7v IIRC) So you're saying that if you use a power adpater you get 3.3v on the Vcc pins, but when you use VBATT you don't? Sounds fishy. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ ------------------------------------------------------------------------- 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 No se han encontrado virus en este mensaje recibido. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.8/1582 - Release Date: 30/07/2008 18:37 |
From: Lawrence H. <gumstix@HariTech.com> - 2008-07-31 19:31:47
|
You need the gumstix plugged in. The 3.3 volt regulator has a enable line that the gumstix motherboard activates. You can test it by probing the correct pin and the regulator will come on. I have same issue, I wanted to test the power before plugging the expensive motherboard in and had some head scratching momemts. Lawrence On 31-Jul-08, at 7:52 AM, David Pérez-Piñar López wrote: > Thanks for the info: I didn't remember that Gumstix has its own > voltage > regulators. So, this means I should give Gumstix some power between > 3.7 and > 5 volts (max.)? > >> So you're saying that if you use a power adpater you get 3.3v on >> the Vcc > pins, but when you use VBATT you don't? Sounds fishy. > > Not exactly. I have not tried the power adapter plug; I just > connected 5 > volts to the VBATT pin, and the other pins in that row labeled with > VCC > don't get any power. However, IC's in the breakout get 5 volts, and I > measure also 3.3 volts (I guess it is the 3232 output). > > Perhaps the missing voltages at the VCC pins means that the Gumstix > must be > attached to its connector for these pins to get the power? I have > not tried > this yet, as I'm checking power first. > > I'm just trying not to fry the Gumstix :) > > Thanks! > > > -----Mensaje original----- > De: gum...@li... > [mailto:gum...@li...] En nombre de Dave > Hylands > Enviado el: jueves, 31 de julio de 2008 16:07 > Para: General mailing list for gumstix users. > Asunto: Re: [Gumstix-users] Breakout-vx power input > > Hi David, > >> Could anyone help me with information about the power conections of >> the breakout-vx? I want to power the breakout from other board. Is it >> possible to give it 5 volts through the VBATT pin instead of using >> the >> plug connection? I have tried this, but the rest of Vcc pins does not >> show any power at all. > > That's odd. > > You need to make sure that the power plug is physically removed, since > plugging in the power adapter will disconnect the VBATT connector. > >> I have looked at the schematic/board, and I guess this could be done. >> However, the Gumstix connector is showing 5 volts in 3 pins (I think >> they are pins # 30, 31 and 32, but don't remember exactly). Gumstix >> needs just >> 3.3 volts... Is this ok? > > Providing 5v on VBATT should be fine, although 4v is recommended. The > gumstix has its own voltage regulators which take VBATT and convert > it to > 3.3v, so VBATT needs to be a bit higher than 3.3v (like around 3.7v > IIRC) > > So you're saying that if you use a power adpater you get 3.3v on the > Vcc > pins, but when you use VBATT you don't? Sounds fishy. > > -- > Dave Hylands > Vancouver, BC, Canada > http://www.DaveHylands.com/ > > ------------------------------------------------------------------------- > 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 > > No se han encontrado virus en este mensaje recibido. > Checked by AVG - http://www.avg.com > Version: 8.0.138 / Virus Database: 270.5.8/1582 - Release Date: > 30/07/2008 > 18:37 > > > ------------------------------------------------------------------------- > 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 |
From: Cryptographrix <cry...@gm...> - 2008-07-31 19:59:35
|
I have been looking to build an RFID reader onto the gumstix system I am building (using the Verdex XM4-BT, consoleLCD16-vx, and NetWifiMicroSD-FCC). I decided to order the ID-20 from SparkFun (sparkfun.com), as it's a very straightforward design, but I'm trying to figure out how I can use it with the consoleLCD16-vx breakouts, as I can not find pin descriptions/labels/etc. Does the consoleLCD16-vx have breakouts for RS232 or just GPIO? The ID-20 has CMOS and TTL(inverted) out, so I imagine I may be able to use gpio, however I do not know how I would. (I'm still trying to figure everything out) Thank you for any help you could provide! - Michael |
From: Dave H. <dhy...@gm...> - 2008-07-31 20:13:14
|
Hi Michael, On Thu, Jul 31, 2008 at 12:59 PM, Cryptographrix <cry...@gm...> wrote: > I have been looking to build an RFID reader onto the gumstix system I am > building (using the Verdex XM4-BT, consoleLCD16-vx, and NetWifiMicroSD-FCC). > > I decided to order the ID-20 from SparkFun (sparkfun.com), as it's a very > straightforward design, but I'm trying to figure out how I can use it with > the consoleLCD16-vx breakouts, as I can not find pin > descriptions/labels/etc. > > Does the consoleLCD16-vx have breakouts for RS232 or just GPIO? Yes - it has both RS-232 and logic level (3.3v) serial. You'll need to remove some resistors in order to use the logic-level ports though. I'd recommend using the STUART port. >From the board layout, there should be 6 pins labelled on the back of the board as STUART. The one with the square pad is ground. Pin 2 (next to pin 1 and the edge of the board) is the TxD line, and pin 4 (next to pin 2 on the edge of the board) is the RxD line. You'll need to remove the resistor labelled STTXD. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: Cryptographrix <cry...@gm...> - 2008-07-31 20:38:02
|
Ok thank you - I'm going to be careful, but I'll document the build process, etc. and put it up on one of my sites/the gumstix wiki if it'd be helpful to others. -----Original Message----- From: gum...@li... [mailto:gum...@li...] On Behalf Of Dave Hylands Sent: Thursday, July 31, 2008 4:13 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] sparkfun ID-20 RFID reader Hi Michael, On Thu, Jul 31, 2008 at 12:59 PM, Cryptographrix <cry...@gm...> wrote: > I have been looking to build an RFID reader onto the gumstix system I am > building (using the Verdex XM4-BT, consoleLCD16-vx, and NetWifiMicroSD-FCC). > > I decided to order the ID-20 from SparkFun (sparkfun.com), as it's a very > straightforward design, but I'm trying to figure out how I can use it with > the consoleLCD16-vx breakouts, as I can not find pin > descriptions/labels/etc. > > Does the consoleLCD16-vx have breakouts for RS232 or just GPIO? Yes - it has both RS-232 and logic level (3.3v) serial. You'll need to remove some resistors in order to use the logic-level ports though. I'd recommend using the STUART port. >From the board layout, there should be 6 pins labelled on the back of the board as STUART. The one with the square pad is ground. Pin 2 (next to pin 1 and the edge of the board) is the TxD line, and pin 4 (next to pin 2 on the edge of the board) is the RxD line. You'll need to remove the resistor labelled STTXD. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ ------------------------------------------------------------------------- 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 |
From: David Pérez-P. L. <dp...@gt...> - 2008-07-31 21:31:47
|
Thanks, Lawrence, I will try to find and probe that pin. -----Mensaje original----- De: gum...@li... [mailto:gum...@li...] En nombre de Lawrence Harris Enviado el: jueves, 31 de julio de 2008 21:28 Para: General mailing list for gumstix users. Asunto: Re: [Gumstix-users] Breakout-vx power input You need the gumstix plugged in. The 3.3 volt regulator has a enable line that the gumstix motherboard activates. You can test it by probing the correct pin and the regulator will come on. I have same issue, I wanted to test the power before plugging the expensive motherboard in and had some head scratching momemts. Lawrence On 31-Jul-08, at 7:52 AM, David Pérez-Piñar López wrote: > Thanks for the info: I didn't remember that Gumstix has its own > voltage regulators. So, this means I should give Gumstix some power > between > 3.7 and > 5 volts (max.)? > >> So you're saying that if you use a power adpater you get 3.3v on the >> Vcc > pins, but when you use VBATT you don't? Sounds fishy. > > Not exactly. I have not tried the power adapter plug; I just connected > 5 volts to the VBATT pin, and the other pins in that row labeled with > VCC don't get any power. However, IC's in the breakout get 5 volts, > and I measure also 3.3 volts (I guess it is the 3232 output). > > Perhaps the missing voltages at the VCC pins means that the Gumstix > must be attached to its connector for these pins to get the power? I > have not tried this yet, as I'm checking power first. > > I'm just trying not to fry the Gumstix :) > > Thanks! > > > -----Mensaje original----- > De: gum...@li... > [mailto:gum...@li...] En nombre de Dave > Hylands Enviado el: jueves, 31 de julio de 2008 16:07 > Para: General mailing list for gumstix users. > Asunto: Re: [Gumstix-users] Breakout-vx power input > > Hi David, > >> Could anyone help me with information about the power conections of >> the breakout-vx? I want to power the breakout from other board. Is it >> possible to give it 5 volts through the VBATT pin instead of using >> the plug connection? I have tried this, but the rest of Vcc pins does >> not show any power at all. > > That's odd. > > You need to make sure that the power plug is physically removed, since > plugging in the power adapter will disconnect the VBATT connector. > >> I have looked at the schematic/board, and I guess this could be done. >> However, the Gumstix connector is showing 5 volts in 3 pins (I think >> they are pins # 30, 31 and 32, but don't remember exactly). Gumstix >> needs just >> 3.3 volts... Is this ok? > > Providing 5v on VBATT should be fine, although 4v is recommended. The > gumstix has its own voltage regulators which take VBATT and convert it > to 3.3v, so VBATT needs to be a bit higher than 3.3v (like around 3.7v > IIRC) > > So you're saying that if you use a power adpater you get 3.3v on the > Vcc pins, but when you use VBATT you don't? Sounds fishy. > > -- > Dave Hylands > Vancouver, BC, Canada > http://www.DaveHylands.com/ > > ---------------------------------------------------------------------- > --- 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 > > No se han encontrado virus en este mensaje recibido. > Checked by AVG - http://www.avg.com > Version: 8.0.138 / Virus Database: 270.5.8/1582 - Release Date: > 30/07/2008 > 18:37 > > > ---------------------------------------------------------------------- > --- 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 ------------------------------------------------------------------------- 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 No se han encontrado virus en este mensaje recibido. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.8/1582 - Release Date: 30/07/2008 18:37 |