arjan-io commented 7 years ago

Hi, I finally have my setup together but there seems to be a problem. so far RPI 3, install of rpi-rgb-led-matrix all went fine. Disabled audio in /boot/config.txt to be sure Adafruit hat HUB75 panel 5V, 4A DC powersupply

I get these distorted pictures: https://ibb.co/mtCLia https://ibb.co/mCZNwv

I also tried the -w option set to 0, 1(everyting very flickery) and 2 to no avail.

After running a demo, I have this left https://ibb.co/kZnWpF. That same blue line sits on top of the display at startup after a power-down. Any tips or tricks?

hzeller commented 7 years ago

You might have an out-door panel with 1:8 multiplexing. So you probably need to give --led-chain=2 --led-rows=16 and then write a transformer that fixes the pixel-mapping.

arjan-io commented 7 years ago

Hi,

Thank you for your quick response!

So you probably need to give--led-chain=2 --led-rows=16

I assume that needs to go into the /lib/Makefile? and then make clean, make

write a transformer that fixes the pixel-mapping

I honestly have no clue as where to start ;(

What I trying to achieve in the first place, is to use 2x2 as one 'pixel'. So this might be the time to include the pixel mapping?

So far, I have this for my own code:

# Constants
MATRIX_W      = 32 # Number of Actual X Pixels
MATRIX_H      = 32 # Number of Actual Y Pixels
MATRIX_DEPTH  = 3  # Color Depth (RGB=3)
MATRIX_DIV    = 2  # Physical Matrix is Half of Pixel Matrix

# Enumerate RGB Matrix Object
matrix = Adafruit_RGBmatrix(MATRIX_H, MATRIX_W/MATRIX_H)

Best regards

hzeller commented 7 years ago

I assume the go into the /lib/Makefile? and then make clean, make

No, you just give these options when you start the program. There are options that control many aspects of the geometry etc.

I honestly have no clue as where to start ;(

In the remapping coordinates section, there is a highlevel overview. The header file describes the interface and in lib/transformer.cc you find some examples.

If you have a standard 1:8 panel, have a look in the issue tracker, some users already did the mapping themselve (search for 1:8 or 1/8. E.g. #311 or #299.

What I trying to achieve in the first place, is to use 2x2 as one 'pixel'. So this might be the time to include the pixel mapping?

No, your pixel mapping maps single logical pixels to single pixels on the display, not four pixels.

Enumerate RGB Matrix Object

matrix = Adafruit_RGBmatrix(MATRIX_H, MATRIX_W/MATRIX_H)

Don't use the Adafruit code, it is hopelessly outdated (they forked my code a long time ago) and can't even deal with the --led-chain etc. flags. Use the code in this library.

arjan-io commented 7 years ago

Hi Henner,

Okay, I'll get on it. I must admit that I was a little lazy and now, just before you last comment, found some issue trackers. I have a look at the ones you suggested as well.

The code I use is a copy of some else. I try to make a wordclock just like that guy. My coding skills in this direction are very limited. It will take some time to figure it out I guess.

I'll report back if at least the mapping is sorted.

Tanks.

arjan-io commented 7 years ago

I think the whole project is a step to far for me ;(

Have been busy the whole afternoon tot write a file that does for (int y = 0; y < matrix->height(); ++y) { for (int x = 0; x < matrix->width(); ++x) { matrix->SetPixel(x, y, 255, 255, 255); } } so I can check in what order they appear but to no avail using the API. Let alone implementing a transformer code.

After hours, I ended up using Python instead and found the following:

I need tot start at position x = -1 and y = 0 for the top left corner
After incrementing y for the specific x, where y = 9, the LED on y = 0 lights up again too and is now running like current y - 8 at the specific x column together with what y actually is

I still get a blue square in the top left 16x8 pixels Python code:


#!/usr/bin/env python
from samplebase import SampleBase
from rgbmatrix import graphics
import time

Class test1(SampleBase): def init(self, *args, *kwargs): super(test1, self).init(args, **kwargs)

def run(self):
    offscreen_canvas = self.matrix.CreateFrameCanvas()
    font = graphics.Font()
    font.LoadFont("../../../fonts/4x6.bdf")
    textColor = graphics.Color(255, 255, 0)
    x = 0
    y = 0
    my_text = "."

    while True:
        offscreen_canvas.Clear()

        for x in range(-1, 32):
            for y in range(0, 32):
                print "x=", x, " y=", y
                offscreen_canvas.Clear()
                graphics.DrawText(offscreen_canvas, font, x, y, textColor, my_text)
                time.sleep(0.05)
                offscreen_canvas = self.matrix.SwapOnVSync(offscreen_canvas)

Main function

if name == "main": test_1 = test1() if (not test_1.process()): test_1.print_help()



I think I need to check my soldering although it looked pretty good. If that is to no avail, I think the screen is faulty. Hard to check though what the exact cause is!

arjan-io commented 7 years ago

Heller,

Thank you for all your support. I've acquired a new display that works perfectly fine now.

Al the best!

hzeller / rpi-rgb-led-matrix

Distorted display #393

Enumerate RGB Matrix Object

Main function