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> USB/serial cable for debugging?, Searching for one for the user port on an Akita
Varti
post Jun 12 2017, 05:41 AM
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Hi,

I'd like to find a cable for serial debugging for my Akita, to be connected on the user port on the rear. There are some different user port cables around, most of them are USB ones, but I don't know which ones can be used for serial debugging (I'm thinking especially for kexecboot debugging). The only one that I have been told to work is the CE-170TS, which is very difficult to find:

http://www.penguin.cz/~utx/hardware/Sharp_CE-170TS/

I have never been able to find one on the japanese Auction site, while many other cables are usually sold there:

CE-175TU: https://buyee.jp/item/yahoo/auction/j403797862
CE-UC1: https://buyee.jp/item/yahoo/auction/f214752315

Does anybody know if those can be used as well, or if they are only used for syncing, and if they are compatible with an Akita?

Varti
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HoloVector
post Jun 15 2017, 08:10 AM
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QUOTE(Varti @ Jun 12 2017, 08:41 AM) *
Hi,

I'd like to find a cable for serial debugging for my Akita, to be connected on the user port on the rear. They are some different user port cables around, most of them are USB ones, but I don't know which ones can be used for serial debugging (I'm thinking especially for kexecboot debugging). The only one that I have been told to work is the CE-170TS, which is very difficult to find:

http://www.penguin.cz/~utx/hardware/Sharp_CE-170TS/

I have never been able to find one on the japanese Auction site, while many other cables are usually sold there:

CE-175TU: https://buyee.jp/item/yahoo/auction/j403797862
CE-UC1: https://buyee.jp/item/yahoo/auction/f214752315

Does anybody know if those can be used as well, or if they are only used for syncing, and if they are compatible with an Akita?

Varti

The Akita's serial port doesn't provide enough power to run those USB cables. Trisoft confirmed that as well. Only the CE-170TS can work with the 3.3v that it puts out. There is one on eBay at the moment. It has a make offer so you be able to get it for cheaper than that.
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Varti
post Jun 16 2017, 10:41 AM
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Thanks for the info. Does this limited support of cables apply to Akitas only, or to the SL-C3xxx as well? Thanks also for the Ebay link, 99 pounds (=113 euros!) is way too much for such a cable, that's the price of a full Zaurus... I have made him an offer of 15 euros, I don't think he'll accept it though...

Varti
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HoloVector
post Jun 16 2017, 11:45 AM
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Yes, this applies to the entire Cxxxx series. During the system board redesign, the 5V lines used for the serial port on the Cxxx were redirected to the USB host port instead thus leaving the Cxxxx series serial port with only 3.3V lines and it being downgraded to a diagnostic port only.

I seem to remember that the fellow who added internal wifi and Bluetooth to his Akita used the second cf port 5V power traces to run these added devices and he theorized that they could be used to up the power to the diagnostic port.
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Dromede
post Oct 17 2017, 11:57 AM
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I most probably have one lying in a drawer somewhere, PM or email me.
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Varti
post Oct 18 2017, 12:58 AM
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QUOTE(Dromede @ Oct 17 2017, 09:57 PM) *
I most probably have one lying in a drawer somewhere, PM or email me.

Thanks Dromede, PM sent. And welcome back smile.gif

Varti
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