From: Chris E. <roo...@gm...> - 2006-11-08 17:58:24
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Hey Dave, When a robostix is plugged in and no tweener is used and no serial > adapter is plugged into the gumstix jack, then you need to put a 10k > resistor between 4 of the gumstix adapter and +5 from one of the UARTs > pins. Some people have also had success putting the resistor beteen > pins 3 & 4 of the gumstix connector. > > Failing to install the resistor will cause the boot to think that the > user is causing a Break and it will drop into u-boot. > > By default, the robostix is held in reset when booting. You can > perform the modifications mentioned on this page to get the robostix > to run as the gumstix is booting: > http://docswiki.gumstix.org/Robostix_uboot > I thought you only needed to add the resistor if you had a pre J-fab robostix? I received mine about a month ago, so I assumed it was J-fab. I am looking at this page: http://docswiki.gumstix.org/Robostix_Mods#Pullup_Resistor Also, I have already performed the modifications to run the robostix when the gumstix boots. Everything seemed to function when I was using a tweener. |