Scan rates 32S, 8S, 16S

[noorabrar1]

Hello sir,

I am new to git hub..

I'm working on HUB75 for a project, the connectivity with pi3, and i am using your client server code. using 3 different scan rate HUB75 board each four 32x32 panel connected in series and parallel

code:

Server: sudo ./ft-server --led-parallel=2 --led-rows=64 -D64x64 --led-chain=2

Client: sudo ./send-text -g64X64+0-0+1 -h localhost "hello" -f fonts/6x12.bdf -c ff0000

• HUB75-P5-16S-32x32-B0 consist of ABCD data lines (Works absolutely fine with series and parallel connections)

• HUB75-P2.5-32S-64X64 consist of additional E data line, wiring is properly connected(Not working properly, some set of upper led wont glow even i made correction -D128x128)

• HUB75-P5-8S-32x32 ABC data lines(Not working properly, multiple prints appear )

Please help me to set different scan rate. is there any other libraries has to downloaded or any other arguments i need to give.. ??

Sorry for posting in that issue i thought it was similar

[hzeller]

What are the options you give for each of these panels ?

• the 4 panels of 32x32, connected parallel need --led-chain=2 --led-parallel=2
• the 4 panels 64x64 need --led-chain=4 --led-parallel=2 --led-rows=64
• Panels with 32x32 and only ABC line need --led-chain=4 --led-rows=16 and you have to write a transformer that matches how the panel maps the pixels.

[noorabrar1]

lets consider 1 panel HUB75-P5-8S-32x32 ABC data lines

server: sudo ./ft-server --led-chain=2 --led-rows=16 --led-parallel=2 -D32x64 client: sudo ./send-text1 -g32x64+0-15+1 -h localhost "hello" -f fonts/6x12.bdf

its displaying something like this below

[hzeller]

You need to set this to --led-chain=4, as each panel internally is double length.

These panels typically have some kind of snaking of pixels inside, which you need to undo in a transformer

There are various ways how these panels do that, so you have to figure that out on your own. Look for 1:8 multiplexing in the issues, some people have done that for their own panels, e.g. https://github.com/hzeller/rpi-rgb-led-matrix/issues/311

[noorabrar1]

Thanks for info sir, That was just 32x32 2 panel which i connected in parallel. for --led-chain=4 its not showing anything. should i download and install transformer code??? I am using flaschen-taschen

[hzeller]

You need to write a transformer.

[hzeller]

If you have a wierd mapping, you might try the new option --led-multiplexing https://github.com/hzeller/rpi-rgb-led-matrix#multiplexing It does the mapping built into the library.