"i2c probe" command in if statement in the u-boot

Rajesh Kannan

Genius 4480 points

Other Parts Discussed in Thread: DM385

Hi TI,

I use "i2c probe" command in if statement in the u-boot.like

if i2c probe =4C; then echo pass; else echo fail; fi

but it always return pass but my i2c probe don't have 4C address

How to compare the valid I2C probe address using if statement in U-BOOT ?

Regards,

Rajesh Kannan.S

over 10 years ago

0 Prabhakar Lad over 10 years ago

Guru 11260 points

Hi,

The i2c probe command in u-boot returns the valid i2c clients connected and doesnt probe to the specified address in earlier versions of u-boot, (since you have posted on dm8148 forum I assume its dm8148 uboot which is taken from TI release and this version is pretty old) , The script which you are trying will work on newer versions of u-boot.

Cheers,
--Prabhakar Lad

0 Rajesh Kannan over 10 years ago in reply to Prabhakar Lad

Genius 4480 points

Hi,

Thank you for your response.yeah i am using dm385.i want to check the detected i2c devices on u boot script.i got device address on
#i2c probe
valid chip address: 18 4C 43 48
how to test this address on u boot script?

Thanks in advance

Rajesh Kannan.S

0 Pavel Botev over 10 years ago in reply to Rajesh Kannan

TI__Guru**** 170625 points

Hi Rajesh,

DM385 u-boot is based on v2010.06, while support for i2c probe command usage in script is added in later version 2012. Try with the below patch:

lists.denx.de/.../135053.html

BR
Pavel

Processors

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"i2c probe" command in if statement in the u-boot