Multi Panel > 3 x P10(16x32) #32
Comments
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@opticron Do you have time to look into this? Appears to be a minor offset calculation problem ... also see https://twitter.com/chellotech22/status/1033117086283784193 |
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I'll take a look. @CTWF the title of the issue says 16x32, I assume these are actually 32x16 (WxH)? |
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It's almost like the color offset is wrong. @CTWF could you provide a pattern test video to verify it's just the mapping that's bad? |
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@opticron yes 32x16 (WxH) found other issue : |
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@opticron how to update offset color with parameter : |
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That's pretty odd. A bad initial mapping can't cause color offsets like that, it would just cause the pixels to show up in the wrong places but the colors would still map to the same location. The code for calculating the color offset hasn't changed since first commit and I doubt it's wrong. It's almost as if one of your panels has an extra hidden or a missing column or the PxMatrix library was initialized with the wrong size. Additionally, there looks to be some weirdness going on between the first and second panels in your initial picture when you're showing only blue or only green text. I know it's probably a lot to ask, but could you verify those two panels individually? Maybe the end of the chain as well. |
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I'll check again tonight |
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Still stuck with panel brand Qiangli |
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Hi @CTWF , how are you? I'm having the same problems as you, I'm trying to use 4 and 8 chained panels brand lightall... Did you have any progress changing the library? |
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I am tring to chaining panels, I use 64X32 pixel RGB, 2 each horizontal panel works. But I need 4 each horizantal or 2X2 chaining. Thank you. |
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HI Thank you |
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thank for answering but no mistake change, here is code and pictures : #include <Ticker.h> #include <PxMatrix.h> Ticker display_ticker; #define P_LAT 22 // PxMATRIX display(32,16,P_LAT, P_OE,P_A,P_B,P_C); uint16_t static banana_frame_3[] = { // ISR for display refresh void setup() { display_ticker.attach(0.002, display_updater); void drawFrame(uint16_t *frame) { void loop() { |
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in fact, we have carre but for 2 panels but with 3 panels we have mare pixels. |
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Please re-read my previous comment...all PxMatrix related defines go before the include |
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yes i also put before but no change. |
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You put them in the wrong place ... |
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here is your request but nothing change. #define PxMATRIX_MAX_WIDTH 96 #include <PxMatrix.h> Ticker display_ticker; #define P_LAT 22 // PxMATRIX display(32,16,P_LAT, P_OE,P_A,P_B,P_C); #define panel_width 3 // ISR for display refresh void setup() { display_ticker.attach(0.002, display_updater); void drawFrame(uint16_t *frame) { void loop() { |
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What size are your panels? |
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32x32 P6 |
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Could you reduce the display time from 70 to 20? |
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nothing change |
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Are you using the latest GitHub master ? |
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1.3.0 on arduino |
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Ok...can you check that there are no cpp files in the library folder. Otherwise everything looks goid |
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Can you try drawing a single pixel instead of the banana |
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yes, 1 red at 0.0, I have it, but inside i have in col 7 red in midille bright. |
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Can you post a picture? |
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i hev sending picture by email. |
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Hey guys other people like me have the same issue... please share pictures and information! Tks! |
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yes but i can't put picture on this web site... |
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@ebelouet Did you have any progress with more than 3 modules? |
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In my case. My panel is uniqe and discontinue from factory. 3 panels is normal. Issue appear on 4 panels. |
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white_rectangle9632.zip Sincerely |
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@lucianolopesjardim At some point you will have to use another library - PxMatrix is not made for chaining a large number of panels. I advise to use something that drives all RGB lines in parallel, preferably using DMA. |
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Thank, do you have link example for that ? Eric |
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Never tried that one but sounds promising: https://github.com/pixelmatix/SmartMatrix/tree/teensylc |
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@2dom I'll take a look, thanks for the suggestion. |
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I found other issue when i use panel 64x32 RGB more than 2 panel (exception error). But when running 2 panel, everything is normal |
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I think it would be nice to give the max configuration of panels for users So, could you explain where is limitation, speed or 3v3 signal for lenght ? |
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There is no limitation per se ... it just becomes unusable because the refresh is too slow. You can chain any number of panels if you set before display.begin() and lower the rate by which the display updater is called. |
I use RGB matrix led panel from China with specifications:
Hardware : Nodemcu ESP8266 Lolin
The result is normal for multi panel = 2. the rest (panel_width> 2) the result is the text / pixel shifts approximately 2 pixels for each color.
the code that I use:
image :
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