micro:bitでmicrobit_screenライブラリを利用する(micro:bit-v2対応,linux版)

2021/1/11
初版

pio microbit_screen lib

pio microbit_screen lib

概要

micro:bitで以下のmicrobit_screenライブラリを利用する(micro:bit-v2対応,linux版)

・https://github.com/ht-deko/microbit_Screen

開発ツールとしてはplatformioを使用するが、そのインストールについては以下を参照のこと：

・micro:bit Arduino/MBED開発ツール(v2)(micro:bit-v2対応,linux版)

該当ライブラリーのインストール方法

  cd demo_sketch
  cd src

  wget https://raw.githubusercontent.com/ht-deko/microbit_Screen/master/microbit_Screen.cpp
  wget https://raw.githubusercontent.com/ht-deko/microbit_Screen/master/microbit_Screen.h

  

オリジナルは、microbit-v1対応なので、 microbit_Screen.hを以下のように修正して microbit-v1/v2両方対応にする。 src/microbit_Screen.h

<修正無しなので省略>

  #ifndef microbit_Screen_h
  #define microbit_Screen_h

  #include <Arduino.h>

  #ifdef MICROBIT
  const uint8_t max_cols PROGMEM = 9;
  const uint8_t max_rows PROGMEM = 3;
  const uint8_t colCount PROGMEM = 5;
  const uint8_t rowCount PROGMEM = 5;
  const uint8_t cols[max_cols] PROGMEM = {3, 4, 10, 23, 24, 25, 9, 7, 6};
  const uint8_t rows[max_rows] PROGMEM = {26, 27, 28};
  #endif
  #ifdef MICROBIT_V2
  const uint8_t max_cols PROGMEM = 5;
  const uint8_t max_rows PROGMEM = 5;
  const uint8_t colCount PROGMEM = 5;
  const uint8_t rowCount PROGMEM = 5;
  const int cols[5] = {4, 7, 3, 6, 10};
  const int rows[5] = {21, 22, 23, 24, 25};
  #endif

  const uint32_t darknessValue = 493;
  const uint32_t brightnessValue = 20;

  typedef struct TPoint {
    uint8_t x;
    uint8_t y;
  } LED_POINT;

  #ifdef MICROBIT
  const LED_POINT LED_POS[rowCount][colCount] PROGMEM =
  {
    {{0, 0}, {3, 1}, {1, 0}, {4, 1}, {2, 0}},
    {{3, 2}, {4, 2}, {5, 2}, {6, 2}, {7, 2}},
    {{1, 1}, {8, 0}, {2, 1}, {8, 2}, {0, 1}},
    {{7, 0}, {6, 0}, {5, 0}, {4, 0}, {3, 0}},
    {{2, 2}, {6, 1}, {0, 2}, {5, 1}, {1, 2}}
  };
  #endif
  #ifdef MICROBIT_V2
  const LED_POINT LED_POS[rowCount][colCount] PROGMEM =
  {
    {{0, 0}, {1, 0}, {2, 0}, {3, 0}, {4, 0}},
    {{0, 1}, {1, 1}, {2, 1}, {3, 1}, {4, 1}},
    {{0, 2}, {1, 2}, {2, 2}, {3, 2}, {4, 2}},
    {{0, 3}, {1, 3}, {2, 3}, {3, 3}, {4, 3}},
    {{0, 4}, {1, 4}, {2, 4}, {3, 4}, {4, 4}}
  };
  #endif

  const uint8_t LED_FONT[96][colCount] PROGMEM =
  <修正無しなので省略>
  

arduino用のplatformio.ini

microbit-v1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:bbcmicrobit]
  platform = nordicnrf51
  board = bbcmicrobit
  framework = arduino
  build_flags = -DMICROBIT -DNRF51_S110
  monitor_speed = 115200
  lib_ldf_mode = deep+

  upload_protocol = cmsis-dap

  lib_deps = 
      https://github.com/adafruit/Adafruit_BusIO/archive/master.zip
      https://github.com/sparkfun/SparkFun_MAG3110_Breakout_Board_Arduino_Library/archive/master.zip
      https://cdn-learn.adafruit.com/assets/assets/000/046/217/original/MMA8653.zip
      https://github.com/stm32duino/LSM303AGR/archive/master.zip
      https://github.com/adafruit/Adafruit-GFX-Library/archive/master.zip
      #
      https://github.com/sandeepmistry/arduino-BLEPeripheral/archive/master.zip
      https://github.com/adafruit/Adafruit_Microbit/archive/master.zip

  

microbit-v2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:bbcmicrobit_v2]
  platform = nordicnrf52
  board = bbcmicrobit_v2
  framework = arduino
  build_flags = -DMICROBIT_V2
  monitor_speed = 115200
  lib_ldf_mode = deep+

  upload_protocol = cmsis-dap

  lib_deps = 
      https://github.com/adafruit/Adafruit_BusIO/archive/master.zip
      https://github.com/sparkfun/SparkFun_MAG3110_Breakout_Board_Arduino_Library/archive/master.zip
      https://cdn-learn.adafruit.com/assets/assets/000/046/217/original/MMA8653.zip
      https://github.com/stm32duino/LSM303AGR/archive/master.zip
      https://github.com/adafruit/Adafruit-GFX-Library/archive/master.zip
      #
      #https://github.com/sandeepmistry/arduino-BLEPeripheral/archive/master.zip
      #https://github.com/adafruit/Adafruit_Microbit/archive/master.zip

  

デモ・スケッチ

以下はv1/v2の両方で動作する：

src/demo.ino

  #include "microbit_Screen.h"

  void setup() {
    SCREEN.begin();
  }

  void loop() {
    //SCREEN.showString("HELLO,WORLD.");  
    //SCREEN.showString("micro:bit!");

  // patched pattern for MB2
    SCREEN.showAnimation((String)
      ". # . . . # # # . . # # # . ." + 
      "# # . . . . . # . . . . # . ." + 
      ". # . . . . # . . . # # # . ." + 
      ". # . . . # . . . . . . # . ." + 
      ". # . . . # # # . . # # # . ."
    );
  //  
    SCREEN.showIcon(IconNames::Heart);
  }
  

microbit-V2では該当ライブラリの修正変更にバグがあり右側から２番目の列のLEDが光らないので 数字の１，２，３を表示した後、欠けたハートマークが表示される。 (今のところ原因不明)
当然のことながらV1では正常に動作する。

参考情報

BBC micro:bit/Arduino化に特化した話

PlatformIO Core (CLI)

以上