I have some trouble with my small I2S OLED SSD1306. When enabled in Marlin 2.0.1 it shows up great buuuut with a bottom line saying TMC CONNECTION ERROR.
M122 in pronterface shows:
Driver registers: X 0xC0:0C:00:00 Y 0xC0:0C:00:00 Z 0xC0:0C:00:00 E 0x00:00:00:00 Bad response! Testing X connection... OK Testing Y connection... OK Testing Z connection... OK Testing E connection... Error: All LOW
Disabling ssd1306 in configuration.h:
and everything works fine. I'm using TMC2209 for all 4 stepper on a RAMPS 1.6PLUS with a Re-Arm clone on.