From: Kahori K. <kah...@ya...> - 2006-06-16 07:59:53
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Hello all, I've used gumstix(gumstix connex 400) and robostix(robostix with headers) toghether. I conect these two like a "Robostix-Gumstix-ISP" page, create a jumper which connects Atmel 0 Tx to PXA ST Rx and Atmel 0 Rx to PXA ST Tx, and connect PC with "gumstix" port on robostix. It works well. Then, I bought a new gumstix (gumstix connex 400 xm) and robostix (robostix-TH, headerless). I connected them in the same way (make the same jumper on robostix), but it doesn't work. I use a minicom on linux, but no signal appear on the screen. So I tried to connext gumstix and robostix with some conbination. There is a result. old gumstix(gusmtix connex 400)-old robostix(with headers) : work old gumstix-new robostix(headerless) : work new gumstix(gusmtix connex 400 xm)-old robostix : not work new gumstix-new robostix: not work I guess new gumstix is broken, but it works well stand-alone. Is it need any other settings when using gumstix connex 400 xm and robostix together? Thank you for your help Kaohri -------------------------------------- Let's start Yahoo! Auction - Free Campaign Now! http://pr.mail.yahoo.co.jp/auction/ |
From: Ricardo R. D. <ric...@gm...> - 2006-06-16 11:02:15
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I have exactly the same problem. Try measuring between +5 and gnd in the gumstix socket in the robostix, if it is less than 5v then you may have to do the uboot "trick" (http://www.gumstix.org/tikiwiki/tiki-index.php?page=RoboStix-uboot), I haven't done it because you nedd a tweeter or a waysmall to do it, and I havent got one. If you do it please let me know. See you On 6/16/06, Kahori Kita <kah...@ya...> wrote: > Hello all, > > I've used gumstix(gumstix connex 400) and robostix(robostix with headers) toghether. > I conect these two like a "Robostix-Gumstix-ISP" page, create a jumper which connects Atmel 0 Tx to > PXA ST Rx and Atmel 0 Rx to PXA ST Tx, and connect PC with "gumstix" port on robostix. > It works well. > > Then, I bought a new gumstix (gumstix connex 400 xm) and robostix (robostix-TH, headerless). > I connected them in the same way (make the same jumper on robostix), but it doesn't work. > I use a minicom on linux, but no signal appear on the screen. > > So I tried to connext gumstix and robostix with some conbination. > There is a result. > > old gumstix(gusmtix connex 400)-old robostix(with headers) : work > old gumstix-new robostix(headerless) : work > new gumstix(gusmtix connex 400 xm)-old robostix : not work > new gumstix-new robostix: not work > > I guess new gumstix is broken, but it works well stand-alone. > > > Is it need any other settings when using gumstix connex 400 xm and robostix together? > > Thank you for your help > Kaohri > > -------------------------------------- > Let's start Yahoo! Auction - Free Campaign Now! > http://pr.mail.yahoo.co.jp/auction/ > > > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > -- Ricardo Ribalda http://ribalda.com |
From: Dave H. <dhy...@gm...> - 2006-06-16 14:12:06
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Hi Kahori, > I've used gumstix(gumstix connex 400) and robostix(robostix with headers) toghether. > I conect these two like a "Robostix-Gumstix-ISP" page, create a jumper which connects Atmel 0 Tx to > PXA ST Rx and Atmel 0 Rx to PXA ST Tx, and connect PC with "gumstix" port on robostix. > It works well. > > Then, I bought a new gumstix (gumstix connex 400 xm) and robostix (robostix-TH, headerless). > I connected them in the same way (make the same jumper on robostix), but it doesn't work. > I use a minicom on linux, but no signal appear on the screen. > > So I tried to connext gumstix and robostix with some conbination. > There is a result. > > old gumstix(gusmtix connex 400)-old robostix(with headers) : work > old gumstix-new robostix(headerless) : work > new gumstix(gusmtix connex 400 xm)-old robostix : not work > new gumstix-new robostix: not work > > I guess new gumstix is broken, but it works well stand-alone. I think that what's happening is something changed in u-boot and it no longer initialzes its GPIO pins in a manner which powers up the robostix properly. This is turn causes the FFUART to not get recognized properly. You may need to apply the changes mentioned on this page: http://www.gumstix.org/tikiwiki/tiki-index.php?page=Robostix-uboot Alternatively, it may be that you just need the 10k resisor between pins 3 & 4 on the gumstix port. If the the voltage converters are being powered and turned on, then without that resistor, it will drop into u-boot when you power up. So the simplest thing to do is to try the resistor fix. If that doesn't work, then you'll need some other base board with serial port access which allows you to modify the u-boot stuff. When you apply power to the the robostix, if everything is powered you should see +5 between pins 1 (gnd) and pin 3 (VCC5) and you should see +5 between pins 1 and 2 (TxD). +5 would the normal idling state for logic level RS-232. Ricardo and I have exchanged a few emails off list and it looks like he's having the exact same problem. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |