everybody: Now, I'm using Beagleboneblack board with bone-debian-9.4-lxqt-armhf-2018-06-17-4gb.img, and I have a touchscreen chip that is TSC2013 with I2C interface, I want to use this chip drive a LCD(800x600),but I failed, I want to know what is wrong with my I2C, who can help me? Thanks a lot.
Your question is extremely vague in terms of what you've attempted so far and what your problems are.
You have to do a bit of work to ensure that i2c is functioning properly on your BBB.
You should follow this tutorial
If there are no active i2c ports, then you have to look into changing the uEnv.txt file to tell the BBB to activate an i2c port when it boots.
Once you have enabled your desired i2c port. Then use i2c-tools to fully debug the active i2c port.
Here is a very good tutorial about the basics of setting up i2c on the BBB
