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Flickering Issue with "ESP32-HUB75-MatrixPanel-I2S-DMA" only #145

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subashsaraf opened this issue Jul 5, 2021 · 25 comments
Closed

Flickering Issue with "ESP32-HUB75-MatrixPanel-I2S-DMA" only #145

subashsaraf opened this issue Jul 5, 2021 · 25 comments
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not an issue with library This library works as expected, but something else is the root cause, such as AdaFruitGFX

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@subashsaraf
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subashsaraf commented Jul 5, 2021 •
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I made a clock with this Library actually the code was from Great Project RGB clock I modify the code according to your Lib. Hence I face Flickering issue . Where the code is absolutely fine PxMatrix lib but when I use "ESP32-HUB75-MatrixPanel-I2S-DMA" then the display is become Flickering .So is there any other way to solve the problem

Link To See the Flickering Issue

https://youtu.be/rzNrKGc8oXI

Code :-

Esp32_DS1307_DHT11_Matrix_p4_RGB_64x32_DMA_AMPM_dma_display.zip
Esp32_DS1307_DHT11_Matrix_p4_RGB_64x32_DMA_AMPM_dma_display.zip

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@mrcodetastic
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mrcodetastic commented Jul 5, 2021 •
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Turn off your LDR checking code and DHT checking code and see if that fixes the issues. I think you have conflicting pin mappings causing noise on the DMA output, given it happens every second or so.

@subashsaraf
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subashsaraf commented Jul 6, 2021 via email

@mrcodetastic
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What does SimpleTestShapes example look like?

Repository owner deleted a comment from subashsaraf Jul 6, 2021
@mrcodetastic
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mrcodetastic commented Jul 6, 2021 •
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Try: https:/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/tree/master/examples/1_SimpleTestShapes

Take a video of this sketch

Please note: I delete your comments in another issue so we can keep the discussion here.

@subashsaraf
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subashsaraf commented Jul 6, 2021 via email

@2BECKHAM2
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2BECKHAM2 commented Jul 22, 2021 •
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@mrfaptastic.

Many thanks for the excellent library.

I'm facing some noise/flickering issues with the 64x32 panel with 1.0.6 esp32 version. I have connected a 3300uf capacitor across 5v in the panel.

https://drive.google.com/drive/folders/1c6tXlEqq_mQJvfQCB-mob6V1B1d418zN?usp=sharing

IMG_20210722_201736

IMG_20210722_144234 1

Is there any config changes that I would have to make?

Thanks.

@mrcodetastic
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Can you check that non-GND pins are not going to ground.

Can you draw a single diagonal line as well?
Looks like some address line issue, check the A,B,C,D pin mapping - perhaps the pins may have moved? Who knows. There seems to be a few of these issues being raised recently.

RGB_HUB75_PINS

@2BECKHAM2
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2BECKHAM2 commented Jul 22, 2021 via email

@mrcodetastic
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mrcodetastic commented Jul 22, 2021 •
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How have you connected the ESP32 to the LED panel? With some custom PCB or pin-by-pin with jumper cable?

You need to check your wiring.

@2BECKHAM2
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2BECKHAM2 commented Jul 22, 2021 via email

@mrcodetastic
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Looking at your photo I see a 16 wire ribbon cable connecting to the panel. So how do you do that without a pcb?

There's something wrong be with your wiring. You need to keep the wire length between the esp32 and panel as short as possible, like 4-5 inches max, or these issues will occur.

This is an electrical issue I think.

@2BECKHAM2
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From the ribbon cable, I have used male to female jumper wire ( colored one which normally use for the esp project) female end will be connected to esp 32.

Find attached screenshot for reference.

IMG_20210723_021123.jpg

IMG_20210723_021110.jpg

Thanks in advance.

@mrcodetastic
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That's likely your problem then. Use shorter female to female jumper cables and connecting directly to the LED panel.

@mrcodetastic mrcodetastic added the not an issue with library This library works as expected, but something else is the root cause, such as AdaFruitGFX label Jul 22, 2021
@mrcodetastic
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Also ensure ground pins on LED panel are grounded.

@2BECKHAM2
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Thanks for your help. Will check as suggested and up date.

@2BECKHAM2
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2BECKHAM2 commented Jul 23, 2021 •
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@mrfaptastic ,

I have connected the shorter cables as suggested by you and observed the less flickering and noise. Find below for your reference.

https://drive.google.com/file/d/1nw4ysHyfHBCSnwHW25mCvjpaQzlTfraj/view?usp=sharing

https://drive.google.com/file/d/1bRwCGyKM6wTf2oT20CQ6o0N3jbupVB9X/view?usp=sharing

IMG_20210723_201121

Also regarding the latch blanking configuration, where exactly should I be making the necessary code changes?

Thanks.

@mrcodetastic
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In the mxconfig that you pass to the library. Refer to: #134

@2BECKHAM2
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@mrfaptastic

Can you please help me in which file the below configuration needs to be changed.

mxconfig.latch_blanking = 4;
mxconfig.i2sspeed = HUB75_I2S_CFG::HZ_10M;

//and reduce brightness as well

// let's adjust default brightness to about 50%
dma_display->setBrightness8(128); // range is 0-255, 0 - 0%, 255 - 100%

mx_config.clkphase = false;

Thanks in advance.

@mrcodetastic
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Please look at the source code of the other examples.

@2BECKHAM2
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2BECKHAM2 commented Jul 24, 2021 •
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Its working like a charm after doing the config changes. - Thanks a lot for your help.

IMG_20210724_193117
IMG_20210724_193120
IMG_20210724_193116
IMG_20210724_193112

@subashsaraf
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Its working like a charm after doing the config changes. - Thanks a lot for your help.

IMG_20210724_193117
IMG_20210724_193120
IMG_20210724_193122
IMG_20210724_193112
IMG_20210724_193116

Sir,
Can you please post the the code link which you is working fine without any issue .So that I will correction my code according to your program

[email protected]

@subashsaraf
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Its working like a charm after doing the config changes. - Thanks a lot for your help.
IMG_20210724_193117
IMG_20210724_193120
IMG_20210724_193122
IMG_20210724_193112
IMG_20210724_193116

Sir,
Can you please post the the code link which you is working fine without any issue .So that I will correction my code according to your program

[email protected]

Sir,
Can you please post the the code link which you is working fine without any issue .So that I will correction my code according to your program

[email protected]

@2BECKHAM2
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@subashsaraf

Please check the example code at https:/2BECKHAM2/ESP32-HUB75-MatrixPanel-I2S-DMA-Examples

@mrcodetastic
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Excellent work @2BECKHAM2 - Would you mind raising a pull request to this repository to update the SimpleTextShapes example to use the new pointer based usage of this library and mxconfig ?

@2BECKHAM2
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2BECKHAM2 commented Jul 26, 2021 via email

@mrcodetastic mrcodetastic mentioned this issue Jul 27, 2021
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