i2c-2 of expansion header is not detected

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1

when i do i2cdetect only i2c1, i2c3 recognizes but no i2c-2. how to enable i2c2 plz

2

That depends... Which Board? Which kernel version? etc..

Regards,

3

beagleboard xm rev c, kernel version - 3.2.0-23

4

That's trivial, apply this patch and rebuild..

http://paste.debian.net/74830/

Regards,

5

Thanks For the Prompt reply

How to apply the patch. I am trying with the following command diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c index 4a71cb7…2148f35 100644 — a/arch/arm/mach-omap2/board-omap3beagle.c +++ b/arch/arm/mach-omap2/board-omap3beagle.c @@ -385,6 +385,7 @@ static int __init omap3_beagle_i2c_init(void) beagle_twldata.vpll2->constraints.name = “VDVI”; omap3_pmic_init(“twl4030”, &beagle_twldata); + omap_register_i2c_bus(2, 400, NULL, 0); /* Bus 3 is attached to the DVI port where devices like the pico DLP * projector don’t work reliably with 400kHz */ omap_register_i2c_bus(3, 100, beagle_i2c_eeprom, ARRAY_SIZE(beagle_i2c_eeprom));

I also tried the git diff commands but terminal shows error
So, finally how to enable the I2c2 iam also thinking of recompiling the kernel from git clone.

6

git am .patch

7

not a git repository… what to do ?? plz help

8

1: Find out who the "authors" of the image you are using.
2: contact them for the kernel source that matches your build
3: download source/patch/build
4: reboot
5: xyz
6: profit

Regards,

9

btw: if you don't want to do that.. just use an image that has it
enabled by default:

http://elinux.org/BeagleBoardUbuntu#Demo_Image

use the "--dtb dt-beagle-xm" option..

i2cdetect -l
i2c-0 i2c OMAP I2C adapter I2C adapter
i2c-1 i2c OMAP I2C adapter I2C adapter
i2c-2 i2c OMAP I2C adapter I2C adapter

Regards,

10

I have downloaded the demo image as indicated in your comment to Harshit , After this I entered the following command in terminal
sudo ./setup_sdcard.sh --mmc /dev/sdx --uboot beagle_xm. After I enter the data in sdcard and boot the beagle it does not boot .
Please Help!

11

Yet, you didn't seem to read the message thou..

"use the "--dtb dt-beagle-xm" option..."

Regards,

12

I have downloaded the demo image as indicated by you in your comment. I entered the following command in the terminal
sudo ./setup_sdcard.sh --mmc --dtb dt-beagle-xm
and put the image in the sdcard but the sdcard does not boot.

13

I have downloaded the demo image as indicated by you in your comment. I
entered the following command in the terminal
sudo ./setup_sdcard.sh --mmc --dtb dt-beagle-xm

"--mmc" specify the device...

and put the image in the sdcard but the sdcard does not boot.

pastebin.com your terminal output when you ran the script..

Regards,

14

srry i have specified the device /dev/sdb in terminal. the sd-card boot up as normal but it is taking time and monitor doesn’t show anything .

15

What kind of monitor? It should auto-detect it..

if it doesn't edit the line that says kms_override in /boot/uboot/uEnv.txt

Regards,

16

monitor is the display connected through hdmi to xm… can u tell me how much time its take for first boot …plz help. i really want to do the i2c work today only…
thanks

17

monitor is the display connected through hdmi to xm.. can u tell me how much
time its take for first boot ..plz help.

could you please be more 'vague'...

btw: also try upgrading, fixed alot of graphics bugs...

saucy:

wget http://rcn-ee.net/deb/saucy-armhf/v3.13.0-rc7-armv7-x7/install-me.sh
sudo /bin/bash install-me.sh

i really want to do the i2c work
today only...

okay.. it's not my fault you started with an image that didn't work..

thanks

Regards,

18

nothing happens … i connect my laptop to xm with putty which signifies that os has booted successfully for the first time . i have enter the caommand as u have said earlier but nothing happens .

19

"nothing happens" please explain..

It doesn't download the image from the server/etc??

Regards,

20

it downloads the image . Than i reboot ,the os boots but the monitor doesn,t display anything