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Old 09-18-2012, 08:32 PM   #14
knc1
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Posts: 17,212
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Join Date: Feb 2012
Location: Central Texas
Device: No K1, PW2, KV, KOA
Quote:
Originally Posted by megacoupe View Post
I've set up my serial connections according to stranger_st's post here, although I did pull the 5V cable out on knc1's recommendation (BTW, I have the same USB-to-TTL adapter that is pictured in that post). However, I seem to be having trouble communicating with the DXG:
Would you please post --name/rank/serial number-- ah, Make and Model at least.
What little I can see in that picture, it looks like one that can be optioned for either 3.3volt or 5volt ttl levels.
The Kindles are neither, they are 1.8volt ttl.

You may have just tested if the serial i/o port is 3.3 (5.0) volt tolerant.
I would not expect them to be, since the Freescale has different output drivers for 1.8 and 3.3 volt on its UART ports.

With the Make and Model (even better, a link to the part page) I could say more specifically what the situation is.

Note the two different serial configurations used by the i.MX31 devices:
Downloader mode: 57500,8,n,2
U-Boot & Linux console: 115000,8,n,1

The ATK application **may** only do serial I/O to **com** ports, if your USB-to-serial adapter does not have a driver to map a USB serial port to a **com** port - check at the vendor's site for that sort of driver.

Under Linux (any *nix) a "character device" is a "character device" is a "character device" is a ...
(Well, you get the idea.)

You would be much better off running a Linux LiveCD than dealing with passing USB devices into and outof a VM instance.

Last edited by knc1; 09-18-2012 at 08:35 PM.
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