Hello,
This is my first ever type of project including raspberry pi’s or led panels but I followed the read me and other online tutorials to the best of my ability and ended up getting the demos to work on both panels (separately). However, if I plug in the ribbon cable to anything that’s not port 1, the panels no longer display the demos. I’ve searched it up and tried various methods and code changes but nothing seems to work. Any idea?
Hardware:
2x 128x64 1.28 pitch panels from:https://www.aliexpress.com/item/1005008700931237.html?spm=a2g0o.order_list.order_list_main.11.4f541802gqO3dO
adafruit triple bonnet hub75 interface
raspberry pi 4 2gb
FC-16P 40-pin ribbon cable from the Pi hut
mean well LRS-100-12 power supply
This is the code i’m using to run the demo’s that seems to work:
sudo ./demo --led-gpio-mapping=regular -D 1 runtext.ppm --led-no-hardware-pulse --led-rows=64 --led-cols=128 --led-show-refresh --led-row-addr-type=3 --led-slowdown-gpio=8 --led-rgb-sequence=BGR --led-parallel=3
pic of the panel back:
pic of the parallel set up, working panel is put in port 1, the non working one in port 3:
I’ve messed with the different option configurations, different address types, all multiplex from 0-17 and nothing seemed to work on the other ports.
I hopefully included all the relevant information, if not i’m sorry and let me know, i’ll correct it asap. As i said, i have no idea about the nuances that come from this type of project so I most likely missed important stuff from the "read me (only ended up getting a panel working due to someone else’s discussion post lol) so I do apologise 