Read I2C on android VIM4

VIM4
1

Android Khadas image

Hello All,

I am trying to read the I2C port on while using android and the command here is not recognized:
image

Any idea on how to access this?

Thanks,
Aaron

2

@chandrian You can view Android documents, which is the correct way.

3

Thanks for the reply. This is the message I got:
image

4

The top image is with the device powered off and the second powered on so I believe it is seeing it, just not getting a good response with the i2cget command.
image

5

@chandrian

image
image1195×786 170 KB

Do you have an external i2c device? If not, the value cannot be read. As mentioned in our document, it is just an example of how to use i2c tools to read and write i2c devices.
image
image1605×314 25.7 KB

7

Thanks for the reply. I realized I was using the example command but I needed to change the device to the right register (0x24)

8

Are there any examples to look at for reading data from the pins for VIM3 or VIM4? I2C, UART, SPI, etc?

9

@chandrian

image
image987×666 11 KB 

console:/ # i2cdetect -l                                                       
i2c-3   i2c             Meson I2C adapter                       I2C Adapter
i2c-1   i2c             Meson I2C adapter                       I2C Adapter
i2c-6   i2c             Meson I2C adapter                       I2C Adapter
i2c-2   i2c             Meson I2C adapter                       I2C Adapter
i2c-0   i2c             Meson I2C adapter                       I2C Adapter
i2c-5   i2c             Meson I2C adapter                       I2C Adapter
console:/ # 
console:/ # i2cdetect -y 6                                                     
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- UU --
10: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
20: -- -- 22 -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- UU -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --                  
1|console:/ # i2cget -fy 6 0x18 00                                             
0xff
console:/ # 
console:/ # i2cdump -fy 6 0x18                                                 
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
10: ff ff 00 04 ff ff 00 ff ff ff ff ff ff ff ff ff    ??.???.?????????
20: 01 01 01 ff ff 00 01 00 00 01 ff ff ff 00 00 ff    ?????.?..????..?
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
80: ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff ff    ??????.?????????
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ????????????????
f0: ff ff ff ff ff ff ff ff ff ff ff 0e 00 00 00 00    ????????????....
console:/ #
10

Thanks! I appreciate the help