80*40 new multiplex mapper

[krishnasandeep10694]

Hi @hzeller, Thanks for the awesome library. I have some doubts about multiplex mapping. I bought some 80*40 panels and tried this library on it. Pixels were disarranged so i wrote a new multiplex mapper looking at existing code of multiplex mappers to correctly arrange the pixels. I bought new bunch of led panels as the old ones are not available thinking that i can write a new multiplexing mapper but the content now is getting duplicated instead of disarranged as shown in the picture below.

Could you help me figure out what might be the reason.

I didn't understand how panel stretch factor is used. Could you explain it.

Thanks

[hzeller]

This looks like it might have a different --led-row-addr-type

[krishnasandeep10694]

Hi, I have tried with other --led-row-addr-type options but the leds are not lighting up. I have read the wiring.md and assuming that wiring would be same for any row-addr-type. I am posting the hub 75 image i found on the back of the panel.

Please have a look at it and suggest us how to proceed.

Thanks

[hzeller]

This might also be a panel that does some sort of double-edge data pushing, but I don't have one of these. If you can reverse engineer this one with strategic pulse generation or finda a datasheet, we can probably do more here.

[cPabz]

@krishnasandeep10694 I need some help connecting 80*40 displays, i have the same issue as you... I am looking for help with the multiplex mapping... Is there a way I can reach out to you, please share..

[cPabz]

@krishnasandeep10694 @hzeller can either of you help me understand stretch factor..? I have successfully written a multiple map for 80*40, but for some reason my lower half of image seems to be mirror image of upper half. Any help is appreciated.