neopixels: xshige's beta notes

neopixels

2020年10月16日 (金)

XIAO/M5Atom/Wio-Terminalでneopixelsを制御する(Arduino版)

2020/10/16
初版

PlatformIO XAIO M5ATOM WIOT neopixels

概要

XIAO/M5Atom/Wio-Terminalでneopixelsを制御する(Arduino版)。
XIAO/M5Atom/Wio-TerminalはplatformがArduinoなので、それを活かして３つのボードでソースを共通化して動かしてみる。

開発ツールplatformioのインストールについては以下を参照のこと：
・開発ツールPlatformIOをcliで使う(Seeeduino-XIAO版)
・M5Atomを開発ツールPlatformIOで使う(M5Atom/Arduino版)
・M5Atomを開発ツールPlatformIOで使う(Windows10版)
・開発ツールPlatformIOをcli(comand line interface)で使う(v2:Seeeduino-Wio-Terminal/Arduino版)

接続

neopixelsはGrove_Connector(GPIO用)に接続する。
(1)XIAO
XIAOのShield経由でGrove_Connectorに接続する。
(2)M5Atom
M5AtomのGrove_Connectorに接続する。
(3)Wio-Terminal
LCD画面に向かって、下部の右のGrove_Connectorに接続する。

platformio.ini

XIAO用：


; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:seeed_xiao]
platform = atmelsam
board = seeed_xiao
framework = arduino

build_flags = -DXIAO

upload_protocol = sam-ba

monitor_speed = 115200

lib_deps =
     # Accept new functionality in a backwards compatible manner and patches
     adafruit/Adafruit NeoPixel @ ^1.6.0

lib_ldf_mode = deep+

M5Atom用：


; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:m5stick-c]
platform = espressif32
board = m5stick-c
framework = arduino

build_flags = -DM5ATOM

monitor_speed = 115200

lib_deps =
    # use M5Atom lib
    3113
    # use "FastLED"
    126
    # Accept new functionality in a backwards compatible manner and patches
    adafruit/Adafruit NeoPixel @ ^1.6.0

lib_ldf_mode = deep+

Wio-Terminal用:


; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:seeed_wio_terminal]
platform = atmelsam
board = seeed_wio_terminal
framework = arduino
build_flags = -DWIO_TERMINAL
lib_deps =  
    adafruit/Adafruit Zero DMA Library@^1.0.8
    https://github.com/Seeed-Studio/Seeed_Arduino_SFUD/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_USBDISP/archive/master.zip    
    https://github.com/Seeed-Studio/Seeed_Arduino_LCD/archive/master.zip        
    https://github.com/Seeed-Studio/Seeed_Arduino_FS/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_atWiFi/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_FreeRTOS/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_atUnified/archive/master.zip
    https://github.com/Seeed-Studio/esp-at-lib/archive/develop.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_mbedtls/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_atWiFiClientSecure/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_atHTTPClient/archive/master.zip
    https://github.com/Seeed-Studio/Seeed_Arduino_atWebServer/archive/master.zip
    #
  # Accept new functionality in a backwards compatible manner and patches
  adafruit/Adafruit NeoPixel @ ^1.6.0

lib_ldf_mode = deep+

Wio-Terminalにおいて「adafruit/Adafruit NeoPixel @ ^1.6.0」ライブラリ以外のライブラリは標準的なものとして登録してあるが、実際には、今回のスケッチで使用していない。
ビルド時に毎回コンパイルされるようなので、ビルド時間短縮のために、使っていないライブラリの登録は削除してもかまわない。

デモ・スケッチ

該当スケッチをダウンロードする：


cd src
wget https://raw.githubusercontent.com/adafruit/Adafruit_NeoPixel/master/examples/simple_new_operator/simple_new_operator.ino

以下のように変更して共通化する：
src/simple_new_operator.ino



#ifdef M5ATOM
 #include "M5Atom.h"
#endif

// NeoPixel Ring simple sketch (c) 2013 Shae Erisson
// Released under the GPLv3 license to match the rest of the
// Adafruit NeoPixel library
// This sketch shows use of the "new" operator with Adafruit_NeoPixel.
// It's helpful if you don't know NeoPixel settings at compile time or
// just want to store this settings in EEPROM or a file on an SD card.

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

// Which pin on the Arduino is connected to the NeoPixels?
#ifdef XIAO
int pin =  2; // XIAO Sheild Connector
#endif
#ifdef M5ATOM
int pin =  26; // Grove Connector of M5Atom
#endif
#ifdef WIO_TERMINAL
int pin =  1; // Grove Connector(lower right) of wio-terminal
#endif
//int pin         =  6; // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?
int numPixels   = 16; // Popular NeoPixel ring size

// NeoPixel color format & data rate. See the strandtest example for
// information on possible values.
int pixelFormat = NEO_GRB + NEO_KHZ800;

// Rather than declaring the whole NeoPixel object here, we just create
// a pointer for one, which we'll then allocate later...
Adafruit_NeoPixel *pixels;

#define DELAYVAL 100 // Time (in milliseconds) to pause between pixels
//#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels

void setup() {
  // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
  // Any other board, you can remove this part (but no harm leaving it):
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
  // END of Trinket-specific code.

  // Right about here is where we could read 'pin', 'numPixels' and/or
  // 'pixelFormat' from EEPROM or a file on SD or whatever. This is a simple
  // example and doesn't do that -- those variables are just set to fixed
  // values at the top of this code -- but this is where it would happen.

  // Then create a new NeoPixel object dynamically with these values:
  pixels = new Adafruit_NeoPixel(numPixels, pin, pixelFormat);

  // Going forward from here, code works almost identically to any other
  // NeoPixel example, but instead of the dot operator on function calls
  // (e.g. pixels.begin()), we instead use pointer indirection (->) like so:
  pixels->begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
  // You'll see more of this in the loop() function below.
}

void loop() {
  pixels->clear(); // Set all pixel colors to 'off'
  delay(500);

  // The first NeoPixel in a strand is #0, second is 1, all the way up
  // to the count of pixels minus one.
  for(int i=0; i<numPixels; i++) { // For each pixel...

    // pixels->Color() takes RGB values, from 0,0,0 up to 255,255,255
    // Here we're using a moderately bright green color:
    pixels->setPixelColor(i, pixels->Color(0, 150, 0));

    pixels->show();   // Send the updated pixel colors to the hardware.

    delay(DELAYVAL); // Pause before next pass through loop
  }
}