Re: Compatibility of serial adapters
If I recall correctly, the XO-1.5's serial adapter shares some circuitry with the camera. Booting an XO-1.5 with a serial adapter means you cannot use the latter. To do this, the XO-1.5 looks for a resistor placed across two of the wires to see if a serial adapter is present. No other XO laptop model has this restriction. Perhaps the older serial adapter simply lacks the sense resistor required for the XO-1.5 to switch modes. On Wed, Oct 21, 2015 at 5:15 PM, James Cameron wrote: > On Wed, Oct 21, 2015 at 11:38:02AM -0500, Peter Easthope wrote: > > Seems that an adapter such as http://www.ebay.ca/itm/381346598663 , > > similar to the first generation adapter, might work. [...] > > Doubt it. The product description is inadequate, it does not state > the serial voltage. It does say supply voltage range. It does not > have any serial control signal strapping. And it has an RS232 > connector, which nobody should need these days. ;-} > > Get a USB adapter instead. As long as the adapter is for 3.3V serial, > it will work with the XO-1 host serial port. The adapter is powered > from the USB host. > > The same seller has a more appropriate adapter for a lower price: > > > http://www.ebay.com/itm/USB-TTL-Converter-Module-LED-CP2102-RX-TX-3-3V-5V-Output-/381153344387?hash=item58be827b83 > > There are now very many alternative adapters that are compatible. > > -- > James Cameron > http://quozl.linux.org.au/ > ___ > 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
Re: Compatibility of serial adapters
On Wed, Oct 21, 2015 at 11:38:02AM -0500, Peter Easthope wrote: > Seems that an adapter such as http://www.ebay.ca/itm/381346598663 , > similar to the first generation adapter, might work. [...] Doubt it. The product description is inadequate, it does not state the serial voltage. It does say supply voltage range. It does not have any serial control signal strapping. And it has an RS232 connector, which nobody should need these days. ;-} Get a USB adapter instead. As long as the adapter is for 3.3V serial, it will work with the XO-1 host serial port. The adapter is powered from the USB host. The same seller has a more appropriate adapter for a lower price: http://www.ebay.com/itm/USB-TTL-Converter-Module-LED-CP2102-RX-TX-3-3V-5V-Output-/381153344387?hash=item58be827b83 There are now very many alternative adapters that are compatible. -- James Cameron http://quozl.linux.org.au/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Compatibility of serial adapters
On Wed, October 21, 2015 12:22 pm, Paul Fox wrote: > i believe it's because the later adapters are USB adapters, and are > powered from the USB side. the old XO-1 adapter gets power from the > laptop -- that power isn't available from later models. (read the > descriptions of "Pin 1" in the Electrical Details section of the page you > linked to. Yes, I noticed that pin 1 doesn't supply power on the 1.5. Power needn't come through the serial connector. Tapping elsewhere should be possible. Thanks, ... Peter E. -- Telephone 1 360 639 0202 or +13606390202 or 12506293757. Bcc: peter at easthope.ca http://easthope.ca/Shop.html ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Compatibility of serial adapters
peter wrote: > Seems that an adapter such as http://www.ebay.ca/itm/381346598663 , > similar to the first generation adapter, might work. The concluding > sentence in > http://wiki.laptop.org/go/Serial_adapters#First_generation_serial_adapter > is "This only works on the XO-1." What prevents it from working on an > XO-1.5? Can anyone elaborate on this compatibility topic? i believe it's because the later adapters are USB adapters, and are powered from the USB side. the old XO-1 adapter gets power from the laptop -- that power isn't available from later models. (read the descriptions of "Pin 1" in the Electrical Details section of the page you linked to. paul =- paul fox, p...@laptop.org ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Compatibility of serial adapters
Seems that an adapter such as http://www.ebay.ca/itm/381346598663 , similar to the first generation adapter, might work. The concluding sentence in http://wiki.laptop.org/go/Serial_adapters#First_generation_serial_adapter is "This only works on the XO-1." What prevents it from working on an XO-1.5? Can anyone elaborate on this compatibility topic? Thanks, ... Peter E. -- Telephone 1 360 639 0202 or +13606390202 or 12506293757. Bcc: peter at easthope.ca http://easthope.ca/Shop.html ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
