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Hi Digilent, zedboard, vivado 2015.4, petalinux 2015.4, /dev/zed_oled, pmodoled-gpio.ko I am working on zedboard to enable onboard-OLED display. First vivado outputs bitstream hardware, then petalinux generates " BOOT.BIN + Image.ub ", finally zedboard bootup by the SD card. " insmod pmodoled-gpio.ko " does bring /dev/zed_oled . However, " cat logo.bin > /dev/zed_oled " has nothing to display. Then I decided to add oled block design in vivado project. I tried two different versions, including tamu https://github.com/ama142/ZedboardOLED-v1.0-IP and Digilent https://github.com/Digilent/vivado-library/tree/master/ip/Pmods/PmodOLED_v1_0 . After making external pin assignment, Vivado / petalinux all functions. However, there is still no outputs on OLED. Please advise how to turn on OLED in petalinux/vivado. Thanks in advance Mike (P.S. OLED by itself works well on OOB package with digilent logo output)