Proposed communication protocol between Host and EC for 1.75
In 1.75 we don't have an LPC bus so we need to create a method for host and EC to communicate. They are connected via a SPI bus.Here's the start of a write up for that interface and a comm protocol. Comments and suggestions welcome. http://wiki.laptop.org/go/XO_1.75_HOST_to_EC_Protocol -- Richard A. Smith One Laptop per Child ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: need help with 'fix clock' problem...
Please send us a shipping address and we will send you a couple of the serial adapters and cables. Regards, John On May 23, 2010, at 11:16 PM, F Young wrote: > Hello! > > I purchased the very first versions of the XO laptop through the "buy > one give one" program in 2007. Although we used several right away and > they worked without any problems...we stored 6 of them away and > recently discovered that none of the screens turn on when powering up. > It appears to be the "fix clock" problem and since I live in > Kyrgyzstan it is too expensive to ship back to the US to get them > repaired. I would like to try to fix this myself but it would be great > if I can get more specific instructions for the following (from > http://wiki.laptop.org/go/Fix_Clock): > > "Using an OLPC serial adapter, connect the laptop to your personal > laptop. On the laptop's motherboard, the serial adapter should be > connected to J1. J1 is a small white connector near the wireless > module." > > Since I am not familiar with computer hardware at all, here are my questions: > > (1) Can you tell me specifically which OLPC serial adapter to buy if I > do NOT want to solder any wires? It would be ideal if you could send > me a link where I can purchase the exact serial adapter online. > > (2) I understand that the OLPC serial adapter must be connected to the > "J1 Serial Port" on the XO's motherboard but I am not sure what kind > of cable is required and how to connect the serial adapter to this > port...Can you send me a photo which illustrates how to connect the > serial adapter to the J1 Serial Port? (It would also be good if you > can include a link to where I can buy the specific cable online.) > > Thanks in advance for your help! We want to start training local Kyrgz > kids here but we're surprised when many of these new XO laptops could > not boot up. > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
need help with 'fix clock' problem...
Hello! I purchased the very first versions of the XO laptop through the "buy one give one" program in 2007. Although we used several right away and they worked without any problems...we stored 6 of them away and recently discovered that none of the screens turn on when powering up. It appears to be the "fix clock" problem and since I live in Kyrgyzstan it is too expensive to ship back to the US to get them repaired. I would like to try to fix this myself but it would be great if I can get more specific instructions for the following (from http://wiki.laptop.org/go/Fix_Clock): "Using an OLPC serial adapter, connect the laptop to your personal laptop. On the laptop's motherboard, the serial adapter should be connected to J1. J1 is a small white connector near the wireless module." Since I am not familiar with computer hardware at all, here are my questions: (1) Can you tell me specifically which OLPC serial adapter to buy if I do NOT want to solder any wires? It would be ideal if you could send me a link where I can purchase the exact serial adapter online. (2) I understand that the OLPC serial adapter must be connected to the "J1 Serial Port" on the XO's motherboard but I am not sure what kind of cable is required and how to connect the serial adapter to this port...Can you send me a photo which illustrates how to connect the serial adapter to the J1 Serial Port? (It would also be good if you can include a link to where I can buy the specific cable online.) Thanks in advance for your help! We want to start training local Kyrgz kids here but we're surprised when many of these new XO laptops could not boot up. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: How can I recover a bum battery?
On Sun, May 23, 2010 at 09:53:26PM -0500, Mikus Grinbergs wrote: > Hmmm. I don't have wireless. If I type in 'telnetd', OFW scans for > OLPCOFW, then for school-mesh channels, then gives up. > > I do have ethernet - but my XO-1.5's OFW (q3a39b) does not appear to > recognize my ethernet dongle (SMC 2208) - its built-in LED never lights > up. [But the built-in LED on an USB stick (plugged in alongside the > ethernet dongle) *does* light up.] Out of luck then for telnetd usage, sorry. -- James Cameron http://quozl.linux.org.au/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
