I am using a TUL-2 board. I’m trying to display a static image on my HDMI display. I went through the code examples but they are mostly for hdmi-in-to-hdmi-out format. I wanted to be able to generate images from scratch (I know this will be slow).
I tried the following, expecting to make the screen white. It fills the screen but generally with random gibberish:
import time import numpy as np import cv2 from pynq.overlays.base import BaseOverlay from pynq.lib.video import * base = BaseOverlay("base.bit") hdmi_out = base.video.hdmi_out hdmi_out.configure(VideoMode(640,480,8),pixelformat=PIXEL_BGR) hdmi_out.start() newframe = hdmi_out.newframe() * 0 + [255,255,255] newframe.coherent = True hdmi_out.writeframe(newframe) time.sleep(5) hdmi_out.close()
Expecting the newframe’s values to be multiplied by 0 then have 255,255,255 added to each, presumably resulting in a white cell everywhere (as if I’d done a #FFFFFF on a website).
Can someone see what I might be doing wrong and point me to relevant docs? I’d be happy to help improve such docs once I figure it out.