I am trying to bring up the touch controller for the RPi 2 display panel on a new piece of hardware (not a raspberry Pi) and I am not detecting the panel on any I2C address.
When I probe for addresses I only get 0x45 (backlight driver I think?) and 0x65 (crypto chip?)
I found from the GT911 controller datasheet (first is that the correct controller?) that the address should be either 0xBA/BB or 0x28/29 but in the forums I also see 0x5D? unclear what I should be seeing
but regardless I am not getting any address, on the pinout I only see one pin for 3.3V and one pin for TOUCH_RESET_N (besides the I2C clk/data lines) I have all set high to 3.3V. (also is it 3.3V or 1.8V? the datasheet seems to indicate both work)
thanks in advance
When I probe for addresses I only get 0x45 (backlight driver I think?) and 0x65 (crypto chip?)
I found from the GT911 controller datasheet (first is that the correct controller?) that the address should be either 0xBA/BB or 0x28/29 but in the forums I also see 0x5D? unclear what I should be seeing
but regardless I am not getting any address, on the pinout I only see one pin for 3.3V and one pin for TOUCH_RESET_N (besides the I2C clk/data lines) I have all set high to 3.3V. (also is it 3.3V or 1.8V? the datasheet seems to indicate both work)
thanks in advance
Statistics: Posted by jwillick — Mon Jan 12, 2026 7:22 pm — Replies 0 — Views 16