YouTube　スクロールサイネージ動画　(http://www.youtube.com/watch?v=3H-lxXOf_OA)

はじめに

本文書は、Adafruit 社（ https://www.adafruit.com/ ）の、LEDマトリクスパネルで、画像のスクロールサイネージをした際の情報をまとめたものです。

（１）Raspberry Pi Zero W
（２）Adafruit RGB Matrix Bonnet for Raspberry Pi
の組み合わせは制御部が小さく、全体がコンパクトになります。
展示会ブース等でデジタルサイネージを、小さなスペースで行えます。

本文書の続編ではカラーLED 64x64dot も動かしています。
スクロールサイネージ（カラーLED 64x64dot、Raspberry Pi Zero W）
https://qiita.com/tshimizu8/items/daa4bbbbb81c9ffaae41

ハードウェア

Raspberry Pi Zero W　(66.0x30.5x5.0 mm)　$10.00

Raspberry Pi Zero W　画像　(Adafruit　https://www.adafruit.com/product/3400)

Adafruit RGB Matrix Bonnet for Raspberry Pi　(66.2x30.7x17.2 mm)　$14.95

Adafruit RGB Matrix Bonnet for Raspberry Pi　画像　(Adafruit　https://www.adafruit.com/product/3211)

マニュアル　Adafruit RGB Matrix Bonnet for Raspberry Pi 24ページ
https://cdn-learn.adafruit.com/downloads/pdf/adafruit-rgb-matrix-bonnet-for-raspberry-pi.pdf?timestamp=1541830799

pin アサイン

LED-Panel	Raspberry Pi
GND	ground
R1 (Red 1st bank)	GPIO 17
G1 (Green 1st bank)	GPIO 18
B1 (Blue 1st bank)	GPIO 22
R2 (Red 2nd bank)	GPIO 23
G2 (Green 2nd bank)	GPIO 24
B2 (Blue 2nd bank)	GPIO 25
A, B, C, D (Row address)	GPIO 7, 8, 9, 10
OE- (neg. Output enable)	GPIO 2 (Rev 2 RPi) or GPIO 0 (Rev 1 RPi)
CLK (Serial clock)	GPIO 3 (Rev 2 RPi) or GPIO 1 (Rev 1 RPi)
STR (Strobe row data)	GPIO 4

32x32 RGB LED Matrix Panel - 5mm Pitch　(167.6x167.6 mm)　$44.95

32x32 RGB LED Matrix Panel 表裏画像　(Adafruit　https://www.adafruit.com/product/2026)

LEDマトリクスパネルの種類（Adafruit） 2018/11

32x16

Size(led)	Pitch(mm)	Price($)	Remarks	Url
32x16	6	24.95	192x96mm	https://www.adafruit.com/product/420

32x32

Size(led)	Pitch(mm)	Price($)	Remarks	Url
32x32	4	49.95	128x128mm	https://www.adafruit.com/product/607
32x32	5	44.95	167.6x167.6mm	https://www.adafruit.com/product/2026
32x32	6	39.95	190.5x190.5mm	https://www.adafruit.com/product/1484

64x32

Size(led)	Pitch(mm)	Price($)	Remarks	Url
64x32	3	89.95		https://www.adafruit.com/product/2279
64x32	4	79.95		https://www.adafruit.com/product/2278
64x32	5	79.95		https://www.adafruit.com/product/2277
64x32	6	84.95		https://www.adafruit.com/product/2276
64x32	4	99.95	Flexible	https://www.adafruit.com/product/3826
64x32	5	109.95	Flexible	https://www.adafruit.com/product/3803

64x64

Size(led)	Pitch(mm)	Price($)	Remarks	Url
64x64	2.5	74.95	160x160mm,1/32s	https://www.adafruit.com/product/3649

ＡＣアダプター　

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ソフトウェア

「Adafruit RGB Matrix Bonnet for Raspberry Pi」マニュアルに従い作業をすると、つぎのデモプログラムとPythonサンプルプログラムがインストールされます。

デモプログラム　メニュー

Controlling RGB LED display with Raspberry Pi GPIO
https://github.com/adafruit/rpi-rgb-led-matrix

Demos, choosen with -D
0 - some rotating square
1 - forward scrolling an image
2 - backward scrolling an image
3 - test image: a square
4 - Pulsing color
5 - Grayscale Block
6 - Abelian sandpile model (-m )
7 - Conway's game of life (-m )
8 - Langton's ant (-m )
9 - Volume bars (-m )

Python サンプルプログラム（main）

image-scroller.py

#!/usr/bin/env python
import time
from samplebase import SampleBase
from PIL import Image


class ImageScroller(SampleBase):
    def __init__(self, *args, **kwargs):
        super(ImageScroller, self).__init__(*args, **kwargs)
        self.parser.add_argument("-i", "--image", help="The image to display", default="../../../examples-api-use/runtext.ppm")

    def run(self):
        if not 'image' in self.__dict__:
            self.image = Image.open(self.args.image).convert('RGB')
        self.image.resize((self.matrix.width, self.matrix.height), Image.ANTIALIAS)

        double_buffer = self.matrix.CreateFrameCanvas()
        img_width, img_height = self.image.size

        # let's scroll
        xpos = 0
        while True:
            xpos += 1
            if (xpos > img_width):
                xpos = 0

            double_buffer.SetImage(self.image, -xpos)
            double_buffer.SetImage(self.image, -xpos + img_width)

            double_buffer = self.matrix.SwapOnVSync(double_buffer)
            time.sleep(0.01)

# Main function
# e.g. call with
#  sudo ./image-scroller.py --chain=4
# if you have a chain of four
if __name__ == "__main__":
    image_scroller = ImageScroller()
    if (not image_scroller.process()):
        image_scroller.print_help()

Python サンプルプログラム（library）

samplebase.py

import argparse
import time
import sys
import os

sys.path.append(os.path.abspath(os.path.dirname(__file__) + '/..'))
from rgbmatrix import RGBMatrix, RGBMatrixOptions


class SampleBase(object):
    def __init__(self, *args, **kwargs):
        self.parser = argparse.ArgumentParser()

        self.parser.add_argument("-r", "--led-rows", action="store", help="Display rows. 16 for 16x32, 32 for 32x32. Default: 32", default=32, type=int)
        self.parser.add_argument("--led-cols", action="store", help="Panel columns. Typically 32 or 64. (Default: 32)", default=32, type=int)
        self.parser.add_argument("-c", "--led-chain", action="store", help="Daisy-chained boards. Default: 1.", default=1, type=int)
        self.parser.add_argument("-P", "--led-parallel", action="store", help="For Plus-models or RPi2: parallel chains. 1..3. Default: 1", default=1, type=int)
        self.parser.add_argument("-p", "--led-pwm-bits", action="store", help="Bits used for PWM. Something between 1..11. Default: 11", default=11, type=int)
        self.parser.add_argument("-b", "--led-brightness", action="store", help="Sets brightness level. Default: 100. Range: 1..100", default=100, type=int)
        self.parser.add_argument("-m", "--led-gpio-mapping", help="Hardware Mapping: regular, adafruit-hat, adafruit-hat-pwm" , choices=['regular', 'adafruit-hat', 'adafruit-hat-pwm'], type=str)
        self.parser.add_argument("--led-scan-mode", action="store", help="Progressive or interlaced scan. 0 Progressive, 1 Interlaced (default)", default=1, choices=range(2), type=int)
        self.parser.add_argument("--led-pwm-lsb-nanoseconds", action="store", help="Base time-unit for the on-time in the lowest significant bit in nanoseconds. Default: 130", default=130, type=int)
        self.parser.add_argument("--led-show-refresh", action="store_true", help="Shows the current refresh rate of the LED panel")
        self.parser.add_argument("--led-slowdown-gpio", action="store", help="Slow down writing to GPIO. Range: 1..100. Default: 1", choices=range(3), type=int)
        self.parser.add_argument("--led-no-hardware-pulse", action="store", help="Don't use hardware pin-pulse generation")
        self.parser.add_argument("--led-rgb-sequence", action="store", help="Switch if your matrix has led colors swapped. Default: RGB", default="RGB", type=str)
        self.parser.add_argument("--led-pixel-mapper", action="store", help="Apply pixel mappers. e.g \"Rotate:90\"", default="", type=str)
        self.parser.add_argument("--led-row-addr-type", action="store", help="0 = default; 1=AB-addressed panels;2=row direct", default=0, type=int, choices=[0,1,2])
        self.parser.add_argument("--led-multiplexing", action="store", help="Multiplexing type: 0=direct; 1=strip; 2=checker; 3=spiral; 4=ZStripe; 5=ZnMirrorZStripe; 6=coreman; 7=Kaler2Scan; 8=ZStripeUneven (Default: 0)", default=0, type=int)

    def usleep(self, value):
        time.sleep(value / 1000000.0)

    def run(self):
        print("Running")

    def process(self):
        self.args = self.parser.parse_args()

        options = RGBMatrixOptions()

        if self.args.led_gpio_mapping != None:
          options.hardware_mapping = self.args.led_gpio_mapping
        options.rows = self.args.led_rows
        options.cols = self.args.led_cols
        options.chain_length = self.args.led_chain
        options.parallel = self.args.led_parallel
        options.row_address_type = self.args.led_row_addr_type
        options.multiplexing = self.args.led_multiplexing
        options.pwm_bits = self.args.led_pwm_bits
        options.brightness = self.args.led_brightness
        options.pwm_lsb_nanoseconds = self.args.led_pwm_lsb_nanoseconds
        options.led_rgb_sequence = self.args.led_rgb_sequence
        options.pixel_mapper_config = self.args.led_pixel_mapper
        if self.args.led_show_refresh:
          options.show_refresh_rate = 1

        if self.args.led_slowdown_gpio != None:
            options.gpio_slowdown = self.args.led_slowdown_gpio
        if self.args.led_no_hardware_pulse:
          options.disable_hardware_pulsing = True

        self.matrix = RGBMatrix(options = options)

        try:
            # Start loop
            print("Press CTRL-C to stop sample")
            self.run()
        except KeyboardInterrupt:
            print("Exiting\n")
            sys.exit(0)

        return True

ここで「from rgbmatrix import RGBMatrix, RGBMatrixOptions」
の「RGBMatrix」は、C++「core.cpp」で定義されています。

参考情報　

共立エレショップ　32×32 RGB LEDマトリックス　KP-3232D　取扱説明書
http://www.kyohritsu.jp/eclib/PROD/MANUAL/kp3232d.pdf
http://eleshop.jp/shop/g/g402304/

ラズパイ2でLED電光掲示板を作る
https://www.buildinsider.net/small/raspisinage/01

はじめに

ハードウェア

Raspberry Pi Zero W (66.0x30.5x5.0 mm) $10.00

Adafruit RGB Matrix Bonnet for Raspberry Pi (66.2x30.7x17.2 mm) $14.95

32x32 RGB LED Matrix Panel - 5mm Pitch (167.6x167.6 mm) $44.95

LEDマトリクスパネルの種類（Adafruit） 2018/11

32x16

32x32

64x32

64x64

ＡＣアダプター

ソフトウェア

デモプログラム メニュー

Python サンプルプログラム（main）

Python サンプルプログラム（library）

参考情報

Raspberry Pi Zero W　(66.0x30.5x5.0 mm)　$10.00

Adafruit RGB Matrix Bonnet for Raspberry Pi　(66.2x30.7x17.2 mm)　$14.95

32x32 RGB LED Matrix Panel - 5mm Pitch　(167.6x167.6 mm)　$44.95

ＡＣアダプター　

デモプログラム　メニュー

参考情報　