I2C Evaluation on MaaXBoard-mini

It seems like there is a gap in the Linux user manual for the Maaxboard-mini when it comes to i2c. Is there any documentation surrounding this? I can't see any scope activity on pins 27/28 with i2cdetect -y 3, is there some command for enabling the J1 40 pin peripheral extension?

Regards,

Jacob

0 jafoste4 over 4 years ago

Hi Jacob,

Quick question, what out of box image are you using? Are you using the Yocto, Debian, or Android image.

-Josh
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0 jafoste4 over 4 years ago in reply to jafoste4

Also, have you taken a look at this blog? Sending Data to Azure with MaaXBoard
It involves the MaaXBoard, not the Mini however it should be fairly similiar.

-Josh
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0 japerl20 over 4 years ago in reply to jafoste4

I am using the Debian image.

No, I hadn't seen that blog although it doesn't address the issue I'm seeing (with 2 maaxboard-mini dev boards) which is the i2cdetect -l returns with I2C0 and I2C3 (which in the documentation it is referred to as I2C1 and I2C4 respectively), but it does not return any information on the I2C's that are exposed on the 40 pin extension header (which would be I2C1 and I2C2 on the board or I2C2 and I2C3 in the documentation).
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0 jafoste4 over 4 years ago in reply to japerl20

Hi Jacob,

I talked to my colleague about this issue and learned the Debian image out of box doesn't support I2C on the 40 pin expansion connector. He reccomended one of the following.

1. Use the Yocto Lite image when does support it
2. rebuild the kernel with the latest source code in 4.14.98 to enable I2C development.

-Josh
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