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Redfizh	2013-12-13 , 03:32
Posts: 10 \| Thanked: 16 times \| Joined on Mar 2013	#211

What a nice Idea. Extra battery of keyboard doesn't have to be connected to I2C. Just bigger one or many in the batteryslot and part of the cover that grips to phone.

Is it wrong to power lights of keyboard straight from the battery with a single switch when keyboard is pulled?

	kimmoli	2013-12-15 , 23:00
	Posts: 562 \| Thanked: 2,744 times \| Joined on Dec 2013 @ Espoo, Finland	#212

Noticed few things, 3.3V is swithed off when the OH switch is released, and when putting cover back on, toh-core (or maybe 'tohd' - the other half daemon?) is looking for at24 eeprom from i2c-1 bus (addresses 0x50 through 0x57.

Devices when OH removed

Code:

[root@localhost devices]# ls
0-0028   12-0012  3-0020  4-001a  4-0048  4-006c  i2c-12
0-0030   12-0039  3-0038  4-0020  4-0060  i2c-0   i2c-3
12-0010  12-006a  4-0015  4-002a  4-0066  i2c-1   i2c-4

and when installed

Code:

[root@localhost devices]# ls
0-0028  1-0051  1-0054  1-0057   12-0039  3-0038  4-0020  4-0060  i2c-0   i2c-3
0-0030  1-0052  1-0055  12-0010  12-006a  4-0015  4-002a  4-0066  i2c-1   i2c-4
1-0050  1-0053  1-0056  12-0012  3-0020   4-001a  4-0048  4-006c  i2c-12

some dmesg entries:
[25526.724549] at24 1-0050: 2048 byte at24 EEPROM, read-only, 0 bytes/write
[25526.755100] qup_i2c qup_i2c.1: I2C slave addr:0x50 not connected
[25526.776220] toh-core toh-core.0: No valid eeprom present

any knowledge what toh-core , and what it is expecting to read from this eeprom?

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Zeta	2013-12-16 , 21:31
Posts: 339 \| Thanked: 1,623 times \| Joined on Oct 2013 @ France	#213

Originally Posted by kimmoli

what it is expecting to read from this eeprom?

Probably same principle as Beagle Bone caps:
To make the system "plug and play", every other half contains an eeprom with some configuration data, so that when you plug one, the phone requests that info and then knows what to do : load that driver (for the useful I2C chip along the eeprom), run that program, ...

Just and educated guess. To be confirmed by someone from Jolla.
Nice finding kimmoli !

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	kimmoli	2013-12-17 , 00:40
	Posts: 562 \| Thanked: 2,744 times \| Joined on Dec 2013 @ Espoo, Finland	#214

Just ordered pcb for my i2c breakout board for jolla (has at24c02, 1.8V LDO for it and i2c level converter to attach also 3.3v i2c devices if/when the support is released within sdk), and printing "myOH" to hold the board in place.

Also just read this http://www.jollausers.com/2013/12/fi...own-to-public/
tempting... i have few wireles charger from dx waiting to be used for something else than supercapacitor-led-lamp-thing-charger.

Kaacz	2013-12-21 , 20:53
Posts: 123 \| Thanked: 108 times \| Joined on Oct 2008 @ Prague, Czech	#215

What about TI LM8330TME [/NOPB] ?
http://www.ti.com/lit/ds/snvs839a/snvs839a.pdf

Hmm .. scary pins .. must be pressed to pcb .. need more space in TOH ..

Last edited by Kaacz; 2013-12-21 at 21:11.

	kimmoli	2013-12-25 , 12:40
	Posts: 562 \| Thanked: 2,744 times \| Joined on Dec 2013 @ Espoo, Finland	#216

Made simple i2c scanning app,

and measured that there is i2c available on the bus.

To get 3.3V out, i need to wait for next update... but my pcb hasn't yet arrived anyway - when it arrives probing will be so much easier.

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dirkvl	2013-12-27 , 11:18
Posts: 1,104 \| Thanked: 5,652 times \| Joined on Feb 2010 @ Holland	#217

can you send me that app? i could check whether it recignizes the tca8424! will work with external 3.3v right?

	kimmoli	2013-12-27 , 15:24
	Posts: 562 \| Thanked: 2,744 times \| Joined on Dec 2013 @ Espoo, Finland	#218

Originally Posted by dirkvl

can you send me that app? i could check whether it recignizes the tca8424! will work with external 3.3v right?

noo

, you need external 1.8V, as the i2c on Jolla is 1.8V (seems that TCA8424 will work downto 1.65V)

The app can be downloaded here-> i2ctest

You need to start this as root from console, otherwise it doesn't work at all.
Select /dev/i2c-1 on first page, then pull down to start scanning.

(HB is just a counter testing C++/QML interaction as if you start the app from console when the screen is off, the app doesn't work correctly)

It tries just to read from the device without settings the buffer address first. If it works, you should see green box at address 38.

When i get my own board from oshpark, i will add some i2c read/write functions to this (piic and diic)

All disclaimers will apply

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dirkvl	2013-12-28 , 16:46
Posts: 1,104 \| Thanked: 5,652 times \| Joined on Feb 2010 @ Holland	#219

Originally Posted by kimmoli

noo [url]
You need to start this as root from console, otherwise it doesn't work at all.

Since I am more a hardware -than a software- kind of guy, how do I start it as root?

I already got it installed and running, but the chip is not yet recognized.

szopin	2013-12-28 , 16:50
Posts: 2,076 \| Thanked: 3,268 times \| Joined on Feb 2011	#220

Originally Posted by dirkvl

Since I am more a hardware -than a software- kind of guy, how do I start it as root?

I already got it installed and running, but the chip is not yet recognized.

In fingerterm:

Code:

devel-su
<password from developer mode SSH>
/usr/bin/i2ctest

edit: for more friendly <sudo command>, you can 'pkcon install sudo' and then add this to /etc/sudoers file:

Code:

nemo ALL=(ALL) NOPASSWD: ALL

Should skip asking for password too

Last edited by szopin; 2013-12-28 at 16:52.

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Page 22 of 81

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Camera phone competition March 2023 "Endless" (35)

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