Cannot i2cdetect I2C device PCA9685 on BBG

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Charles Chao

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Nov 19, 2018, 9:19:58 PM11/19/18
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Hi
I have connected I2C device PCA9685 to BBG and try i2cdetect and nothing came out! ?
I check with support from PCA9685 and change to connect to a second PCA9685; still not i2cdetect on 40?

https://forums.adafruit.com/viewtopic.php?f=19&t=143686&p=709867#p709867


I have checked some relevant topic and perhaps my BBG's i2c "OVERLAY" or "DEVICE TREE" not setting right?


Need your kindly help!


Charles    

Mala Dies

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Dec 4, 2018, 8:08:49 PM12/4/18
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Hello,

I have updated my machine to the newest image and kernel that BBB.io/latest-images provide. Also, I use config-pin now. For example: sudo config-pin P9.17 i2c and then try sudo config-pin P9.18 i2c, too. That should open up your i2c address on your BBB or other bbb.io related boards.

Seth

P.S. DTOs are old news as far as I am concerned. They have U-Boot Overlays now. Anyway, here is some reading on the subject: https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays.
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