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Unable to detect i2c device #3

Open indoorrobot opened 3 years ago

indoorrobot commented 3 years ago

Hi, I have updated my upboard to use kernel 5.4.0-1-generic for Ubuntu 18.04 and since then I do not see my i2c device (mlx90641). When listing the i2c devices using i2cdetect -l i see 

i2c-3   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-10  i2c         i915 gmbus dpb                      I2C adapter
i2c-1   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-8   i2c         i915 gmbus panel                    I2C adapter
i2c-6   i2c         i915 gmbus ssc                      I2C adapter
i2c-4   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-11  i2c         i915 gmbus dpd                      I2C adapter
i2c-2   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-0   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-9   i2c         i915 gmbus dpc                      I2C adapter
i2c-7   i2c         i915 gmbus vga                      I2C adapter
i2c-5   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-12  i2c         DPDDC-D                             I2C adapter
i2cdetect -r -y 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

I have an upboard with the previous kernel (4.4.0-2-upboard) here is looks sorted:

i2c-0   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-1   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-2   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-3   i2c         i915 gmbus ssc                      I2C adapter
i2c-4   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-5   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-6   i2c         Synopsys DesignWare I2C adapter     I2C adapter
i2c-7   i2c         i915 gmbus vga                      I2C adapter
i2c-8   i2c         i915 gmbus panel                    I2C adapter
i2c-9   i2c         i915 gmbus dpc                      I2C adapter
i2c-10  i2c         i915 gmbus dpb                      I2C adapter
i2c-11  i2c         i915 gmbus dpd                      I2C adapter
i2c-12  i2c         DPDDC-D                             I2C adapter

And I can see the device here where is should be (0X33):

i2cdetect -r -y 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- 33 -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

am I missing something?

dorfindoor commented 3 years ago

I have also encountered the same issue! Any updates?

CammyTetehJr commented 3 years ago

There are two i2c pins on the upboard, Pins 3 and 5 for i2c-5 and pins 27 and 28 for i2c-0. On which Pins do you have your i2c device connected to? You can try to see if the device is listed for example if connected to pins 3 and 5 i2cdetect -r -y 5

lovtulip commented 2 years ago

I have also encountered the same issue too!!!! anyone can figure it out?

lovtulip commented 2 years ago

Okay, I figured it out. first, i connected i2c to pin 1&2, but it's not i2c_5 as they(AAeon) told. Sec, There is a very important information but not mentioned in git hub but in manual. "Open-drain I2C bus. Needs the pullup resistors to external 3.3V"

So I connected two 10K ohm resistor from 3.3V to SDL and SDA, Then i found my device on I2C_3. Thanks for god. Here is manual: https://newdata.aaeon.com.tw/DOWNLOAD/MANUAL/UP%20Xtreme%20(UP-WHL01)%20Manual%206th%20Ed.pdf