Jetson Nano can't detect the connected I2C device every boots up

Autonomous Machines Jetson & Embedded Systems Jetson Nano
#1

Hi
I connected a liquid lens driver MAXIM MAX14574 to Jetson Nano on pin 1 3.3V, pin 3: I2C_2_SDA, pin 5: I2C_2_SCL and pin 6 GND.

The command sudo i2cdetect -l output as below:
image

The MAX14574 7 bits address is 0x77. But sometimes, the i2cdetect -y -r 1 command can’t detect the address 77 on terminal, which resulted my program does not work.

If i2cdetect can’t detect the connected device, a power cycle may make the connected MAX14574 available.

Would you please let me know how to sort out this issue?
Thanks

#4

There should be no problem on Jetson side. There is no other device on this I2C. Please check your device setting first, also you can use a oscilloscope to check the I2C signals waveform with & without device attached to confirm if the signals are correct.

#5

I only connected one camera and the liquid lens driver MAX14574 to Jetson Nano.
The command i2cdetect -y -r 2 return address 50 and 57, which device are connected to Jetson Nano?
From where to check my device setting and what will checked?
Thanks

#6

Did you attach device on the I2C of pin 3 and pin 5? There is no other devices on it.

You can use an oscilloscope to probe the I2C pins to get the signal waveform as needed.