Jetson Tx2 camera I2C communication problem

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

I develop custom camera porting in Jetson Tx2 board.

custom sensor slave address : 0x20

I am testing by modifying the ov5693 device driver.

I2C communication is not working.
i2cdetect It looks like you read some data like the message below.

jpchae@jpchae-desktop:~/Downloads$ sudo i2cdetect -y -r 2
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: 10 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

dmesg message is shown below.

[ 840.443150] tegra-i2c 3180000.i2c: no acknowledge from address 0x3

I checked for a hardware connection problem.

pwdn-gpio, reset-gpio high / low operation check is okay
scl-gpio Oscilloscope to check 8-bit clock generating is okay
sda-gpio Oscilloscope to check 8-bit data signal is okay

I have also lowered the speed of the i2c clock.

i2cset and i2cget commands give an error. (The symptoms are the same for the ov5693 camera.)

jpchae@jpchae-desktop:~/Downloads$ sudo i2cset -f -y 2 0x20 0x01 0x00
Error: Write failed

jpchae@jpchae-desktop:~/Downloads$ sudo i2cget -f -y 2 0x20
Error: Read failed

This test hardware confirms that it works on the evm board for camera testing, and attempts to connect to jetson tx2.

Where should I check?
Please let me know if there is a way to test the operation of i2C in device driver separately.

5

Do you mean you have the signals waveform of I2C dat/clk are correct but can’t get ACK? Is the address correct? Why it is 0x20 but get message of "[ 840.443150] tegra-i2c 3180000.i2c: no acknowledge from address 0x3? If waveform output is correct, then seems like it is problem of sensor itself which need to check based on its datasheet or support of vendor.

6

Hi Trumany,

As your advise, I checked address value.
technical document is very confuseing address value, finally i knew the address,
I solved problem.

Thank you for your help.