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T4240RDB: Target hangs while scanning I2C bus 0; requires hard reboot

Question asked by Abdur Rehman on Jun 3, 2015
Latest reply on Nov 23, 2016 by Anton Kachalov

Hi,

 

We are observing system hangs while trying to `byte read` from slave address 0x61

 

root@t4240rdb-64b:~# i2cdetect -y -r 0

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

00:          -- -- -- -- -- 08 -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- -- -- 1a -- 1c -- 1e --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- UU

30: -- -- 32 -- 34 -- 36 -- -- -- -- -- -- -- -- --

40: -- -- -- -- -- -- -- -- -- -- -- UU -- -- -- UU

50: 50 -- 52 -- 54 -- 56 -- -- -- -- -- -- -- -- --

60: 60

##System hangs at this point

..reboot

 

root@t4240rdb-64b:~# i2cget -y 0 0x61 0x02 b

##System hangs at this point

 

The reference board schematic does not list any device present at I2C slave address 0x61.

Any pointers on how to resolve this issue?

 

Thanks
AbdurRehman

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