I’m trying some solutions for some P4 80x40 panels, to get a matrix display for an arcade emulator. I am playing around with the rpi-rgb-led-matrix. when running the demos on the panels, rows 17-20 and 36-40 are superimposed on-top of rows 1 to 4. (i can see both parts of the image)
Reading the documents I acknowledge this seems to be geared to panels using multiples of 16 rows not the 20 I have.
Has this come up in similar form already or is there an easy way I am missing to correct. ( checked the wiring and the panel used ABCD there is definitely no E.
I played with the multiplex settings but default gives the best result other than the lines above 16 being superimposed on lines 1 -4