i.MX ProcessorsのトピックRe: i2c sending failed

i2c sending failed

PramodKumar — Sat, 20 Jun 2015 03:55:28 GMT

hii

i am using 2.6.35.3 kernel in ltib but when i want used the i2c device its like rtc and tcp ip its producing "Failed writing to the I2C-bus: Connection timed out "

example:

[root@alarm i2c]# ./i2c-tool -w 0 0x48 4 0x02 0xA0 0x40 0x03
SLAVE ADDRESS: 0x48
NUMBER OF BYTES TO WRITE: 4
MEMORY ALLOCATED AT ADDRESS: 0x12008
/dev/i2c-0 OPENDED!
Failed writing to the I2C-bus: Connection timed out

Thanks&regard

pramod kumar

Re: i2c sending failed

igorpadykov — Mon, 22 Jun 2015 04:08:39 GMT

Hi Pramod

before writing, file /dev/i2c-0 should be created manually, please look

at correct procedure below

All Boards I2C-tools

Best regards

igor

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Re: i2c sending failed

PramodKumar — Tue, 23 Jun 2015 05:55:31 GMT

Hii igorpadykov

Thanks for that ..i have followed all process also uesd I2C-tool but when run this command it s producing this ..and i am working on imx233 board

plz tell me how to solve this problem

root@freescale /home$ i2cdetect -l

i2c-0 i2c MXS I2C adapter I2C adapter

root@freescale /home$ i2cdetect 0

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will probe file /dev/i2c-0.

I will probe address range 0x03-0x77.

Continue? [Y/n] y

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: -- -- -- -- -- -- -- -- -- -- -- -- --hw_i2c_dma_setup_read

10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

30: ��-- hw_i2c_dma_setup_read��-- hw_i2c_dma_setup_read

-- hw_i2c_dma_setup_read

-- -- -- -- -- -- -- -- --

40: -- -- -- -- -- -- -- -- -- -- hw_i2c_dma_setup_read-- -- -- -- -- --

-- hw_i2c_dma_setup_read

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- --

....................................................................................................................................................................................................................

root@freescale /home$ i2cdump 0 0x6a

No size specified (using byte-data access)

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will probe file /dev/i2c-0, address 0x6a, mode byte

Continue? [Y/n] y

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef

XX XX XX XX X� XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
20: XX XX XX XX XX XX XX XX XX XX .�Minicom2.5XX XX XX XX XX	XXXXXXXXXXXXXXXX
30: XX XX XX XX XX XX XX .�Minicom2.5X XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
50: XX XX .�Minicom2.5XX XX XX XX XX XX XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
60: XX XX XX XX XX XX XX XX XX XX XX .�Minicom2.5XX XX XX XX	XXXXXXXXXXXXXXXX
70: XX X�Minicom2.5XX XX XX XX XX XX XX XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
80: XX .�Minicom2.5XX XX XX XX XX XX .�Minicom2.5XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX
90: XX XX XX XX X�Minicom2.5XX XX XX XX XX XX XX XX XX XX XX	XXXXXXXXXXXXXXXX

a0: XX .�Minicom2.5XX XX XX XX .�Minicom2.5XX XX .�Minicom2.5.�Minicom2.5XX XX XX XX ....XXXXXXXXXXXXXXXX

b0: Minicom2.5XX XX XX XX XX .�Minicom2.5XX XX XX XX XX

root@freescale /home$ i2cset 0 0x6a 01 0x0008 w

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will write to device file /dev/i2c-0, chip address 0x6a, data address

0x01, data 0x08, mode word.

Continue? [Y/n] y

Error: Write failed

Re: i2c sending failed

igorpadykov — Tue, 23 Jun 2015 06:04:22 GMT

Hi Pramod

please try latest official i.MX23 EVK Linux BSP release

L2.6.31_10.05.00_SDK_SOURCE : Linux 2.6.31 Source Code Files 2010.05 Release.

~igor

Re: i2c sending failed

igorpadykov — Wed, 24 Jun 2015 14:43:06 GMT

Hi Pramod

if you are using successfully imx233-olimax kernel,

then seems your board is based on olimax board.

Suggested Linux BSP release was developed for i.MX23 EVK,

not for olimax board. I would suggest to post this to

Olimex

~igor

Re: i2c sending failed

fabio_estevam — Wed, 24 Jun 2015 16:30:46 GMT

Hi Pramod,

I suggest you to use kernel 4.1 with and apply the following patch:

https://git.kernel.org/cgit/linux/kernel/git/shawnguo/linux.git/commit/arch/arm/boot/dts/imx23.dtsi?h=for-next&id=71a34d…

It will be part of 4.2 kernel, but you can apply it manually and I2C will work. Then you can add the dts entry in the imx23-olinuxino device tree file.

Regards,

Fabio Estevam

Re: i2c sending failed

fabio_estevam — Wed, 24 Jun 2015 16:35:59 GMT

And here is the patch that adds i2c to the olinuxino board:

https://git.kernel.org/cgit/linux/kernel/git/shawnguo/linux.git/commit/arch/arm/boot/dts/imx23-olinuxino.dts?h=for-next&…