#touchbook IRC Log


IRC Log for 2010-02-20

Timestamps are in GMT/BST.

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[8:33] <Aard> gregoiregentil: working. problem was apparently that the time between usb v5 becoming available an the chip initialization was too short
[8:33] <Aard> currently fixed it by adding ssleep(1) to the rtc driver. got an idea about a better suitable power source?
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[11:10] <azaghal> Are unusable AC adapters common with Touchbook?
[11:12] <leinir> not entirely common, but it's certainly not unheard of
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[11:51] <aswin> I have the triple boot setup installed... and I am trying see if files in /home/ai of one OS(say AI-OS) can be seen from another OS (say Ubuntu). So far, I have not been to do it.. any pointers ?
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[12:18] <gregoiregentil> aswin: not it's not supported though it's on the todo list
[12:18] <gregoiregentil> each OS has it's own folder on the second partition:
[12:18] <gregoiregentil> /.overlay-ai-os
[12:18] <gregoiregentil> /.overlay-ubuntu
[12:18] <gregoiregentil> and so on
[12:19] <gregoiregentil> the idea would be to have a single home but also it may create some problems for some applications
[12:19] <gregoiregentil> that don't have the same config in both OS
[12:19] <gregoiregentil> if you really want to access the data from one OS to the other you can still do it in command line:
[12:19] <gregoiregentil> sudo -s
[12:19] <gregoiregentil> mkdir 2
[12:19] <gregoiregentil> mount /dev/mmcblk0p2 2
[12:19] <gregoiregentil> ls -lah 2/.overlay*
[12:21] <Corsac> gregoiregentil: currently porting the patches
[12:21] <gregoiregentil> cool. So you found the solution?
[12:21] <gregoiregentil> porting the patches shouldn't be too complex. I can help. I know them quite well ;-)
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[12:39] <Corsac> gregoiregentil: it's fine, it's just a bit long since I need to re-bitbake each time a patch fails
[12:39] <Corsac> then port the various hunks where needed
[12:39] <gregoiregentil> you can do the following:
[12:39] <Corsac> it's usually not too hard
[12:39] <gregoiregentil> bitbake -if
[12:39] <gregoiregentil> compile linux-omap-psp
[12:39] <gregoiregentil> at least you avoid the parsing of the recipes
[12:39] <Corsac> yeah
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[12:54] <Aard> gregoiregentil: what signal levels can the internal serial port take? should I add a level shifter like the max232?
[12:55] <gregoiregentil> no
[12:55] <gregoiregentil> http://www.alwaysinnovating.com/wiki/index.php/Serial_cable
[12:56] <Aard> yeah, I read that, but I've been missing some details about the internals
[12:56] <Aard> like, how it will behave if I plug in a box with 19V on the serial line
[12:57] <gregoiregentil> ohhh. I don't know
[12:57] <gregoiregentil> there is some level sifter on the serial
[12:57] <gregoiregentil> because the TI chip.
[12:57] <gregoiregentil> download the schematics on the website
[12:58] <Aard> it's inside the ti chip?
[12:58] <gregoiregentil> the TI serial chip I mean
[12:58] <Aard> can you give me the exact name?
[12:58] <gregoiregentil> of the TI chip?
[12:58] <Aard> yes
[12:58] <gregoiregentil> yes, one second
[12:58] <Corsac> hmhm, there's no way dss2-fix-XY-coordinates-when-rotating.patch will work
[12:58] <gregoiregentil> wiki again!!!
[12:59] <gregoiregentil> Corsac: leave it for the moment on the side
[12:59] <gregoiregentil> we can investigate later
[12:59] <Corsac> yup
[12:59] <gregoiregentil> perhaps this patch has been integrated upstream
[12:59] <Corsac> just marking it as such
[12:59] <gregoiregentil> http://www.alwaysinnovating.com/wiki/index.php/BOM_Board
[12:59] <Corsac> no, but the variable names have changed
[13:00] <gregoiregentil> U10
[13:00] <gregoiregentil> http://focus.ti.com/lit/ds/symlink/sn75c3221e.pdf
[13:00] <Aard> thanks
[13:02] <Aard> the other thing I asked above, any idea of an easy accessible 5v source that is not the USB I'm currently using?
[13:03] <gregoiregentil> yes.
[13:03] <gregoiregentil> C 184
[13:04] <gregoiregentil> on the left
[13:04] <gregoiregentil> around the battery connector but on the other side (top side)
[13:04] <gregoiregentil> left side of the component is 5V
[13:05] <Aard> C1_6_4?
[13:07] <Aard> looks like it
[13:08] <aswin> gregoiregentil: Thanks! ..thats good enuf! I was trying to mount mmcblk0p1/3 etc w/o realizing that all of the actually sit inside p2.
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[13:17] <azaghal> gregoiregentil: Any info on what type of adapter can be used instead of the one that comes with the Touchbook?
[13:24] <gregoiregentil> any as long as it's 5V
[13:24] <gregoiregentil> and has at least 1.5A
[13:25] <Aard> oh, interesting. there might be usb charges around that can do that
[13:26] <Aard> didn't try it since I thought I might need to come close to the 3.5A the original one ships with
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[13:27] <azaghal> gregoiregentil: Thanks
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[13:32] <azaghal> gregoiregentil: 5V at 7.5A shouldn't damage the device?
[13:33] <gregoiregentil> theoriticaly no but I really don't think that I would try this
[13:33] <azaghal> Ok
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[13:42] <dpb> it'll probably wear down the battery faster
[14:15] <Aard> gregoiregentil: can you give me the type numbers of the transistors on top of the mainboard (7, most likely for usb)?
[14:16] <gregoiregentil> NTR2101PT1G-SOT23
[14:17] <Aard> thanks. still searching for a pin that is not connected to usb...
[14:23] <gregoiregentil> not sure to understand what you are looking for?
[14:24] <Aard> a pin giving me 5v and has nothing to do with usb. problem is, usb v5 is only switched on when the usb drivers load. which means the rtc does not have enough time to switch to operating mode before the driver gets loaded
[14:24] <Aard> (and will switch to backup mode if the usb subsystem gets unloaded)
[14:33] <gregoiregentil> C184
[14:34] <Aard> I only found a C164 at the location you described
[14:34] <gregoiregentil> on top side at the bottom around the battery connector
[14:34] <gregoiregentil> it's a big one
[14:34] <gregoiregentil> it's a 10uF
[14:34] <Aard> the one one the other side of the mini-usb-connector?
[14:34] <gregoiregentil> just on the left of the diode that blinks
[14:35] <gregoiregentil> but it's 5V DC not 5V generated by battery and merged with DC
[14:35] <gregoiregentil> really search for C184
[14:35] <Aard> ok
[14:35] <Aard> 5v dc is ok
[14:36] <Aard> to clarify which side is which: the side where the battery connector is, or the opposite one? (i.e., do I need to remove the board?)
[14:42] <Aard> ah, found pictures of the other side
[14:50] <Aard> due to being lazy about removing the mainboard we decided to solder it to L21 (near the transistors mentioned above)
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[15:19] <Aard> gregoiregentil: at L21 it's working without the ssleep in the kernel module. would you include the rtc-module in the main kernel if I send you the patched board file, in case other people want to do the hack, too?
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[19:53] <gregoiregentil> Aard: sure
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