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@caa45040(caa45040)

[I2C]STM32C0116-DK、有機EL(SSD1306)で「理系フリマ」(水平走査)と表示して遊ぶ。20250830あるよ

Last updated at Posted at 2025-08-07

結果

  • 22kbyte

Screenshot from 2025-08-07 16-54-23.png

Screenshot from 2025-08-24 06-45-51.png

プログラム(SSD1306オリジナルドライバーだよ)




//秋月のOLEDとアイテンドウのOLEDのアドレスは3C
//SSD1306_all_128x64_H_C0116_1


//ヘッダー
#include <Arduino.h>
#include <Wire.h>


//定義
#define MAX_PAGE (7)
#define MAX_COL (127)

#define COMMAND_MODE 0x80  // continuation bit is set!
#define DATA_MODE 0x40

#define SET_COLUMN_ADDRESS 0x21  // takes two bytes, start address and end address of display data RAM
#define SET_PAGE_ADDRESS 0x22    // takes two bytes, start address and end address of display data RAM

#define SET_MEMORY_ADDRESSING_MODE 0x20  // takes one byte as given above
#define HORIZONTAL_ADDRESSING_MODE 0x00

// ビットマップデータ
// 'kao_1', 128x64px
static const unsigned char PROGMEM kao_1[] = {
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xcf, 0xff, 0xe0, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xf0, 0x00, 0x07, 0xf8, 0x00, 0x07, 0xff, 0xff, 0xff, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0xff,
  0xe0, 0x30, 0x00, 0x07, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0xff,
  0x00, 0x30, 0x03, 0xe7, 0x00, 0x07, 0xff, 0xff, 0xfe, 0x03, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0xff,
  0x00, 0x31, 0xf3, 0xe7, 0xff, 0x87, 0xff, 0xc0, 0x00, 0x01, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0xff,
  0x01, 0xf1, 0xf3, 0xe7, 0xff, 0x07, 0xff, 0xc0, 0x00, 0x01, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0xff,
  0xe1, 0xf1, 0xf3, 0xe7, 0xfc, 0x1f, 0x8f, 0xc0, 0x00, 0x01, 0x1f, 0xf0, 0xff, 0x80, 0x00, 0x01,
  0xe1, 0xf1, 0xf0, 0x07, 0xf8, 0xff, 0x0f, 0xc0, 0x3f, 0xe1, 0x1f, 0xf0, 0xc0, 0x00, 0x00, 0x00,
  0xe1, 0xf0, 0x00, 0x07, 0xe0, 0xfc, 0x0f, 0xff, 0xff, 0xe1, 0x1f, 0xf0, 0xc0, 0x00, 0x00, 0x00,
  0xe1, 0xf0, 0x00, 0xe7, 0xe1, 0xf8, 0x1f, 0xff, 0xff, 0xe1, 0x1f, 0xf0, 0xc0, 0x00, 0x3f, 0xc1,
  0xe1, 0xf9, 0xf3, 0xe7, 0xf0, 0x00, 0x7f, 0xff, 0xff, 0xc1, 0x1f, 0xf0, 0xe1, 0xff, 0xff, 0xc3,
  0xe0, 0x39, 0xf3, 0xe7, 0xf0, 0x01, 0xff, 0xff, 0xff, 0xc1, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0x87,
  0x00, 0x39, 0xf3, 0xc7, 0xfe, 0x03, 0xc7, 0xff, 0xff, 0xc3, 0x1f, 0xf0, 0xff, 0xff, 0xff, 0x07,
  0x00, 0x39, 0xf3, 0x07, 0xfe, 0x0f, 0xc3, 0xff, 0xff, 0x83, 0x1f, 0xf0, 0xff, 0xff, 0xfe, 0x0f,
  0x01, 0xf8, 0x00, 0x07, 0xf8, 0x3f, 0xc1, 0xff, 0xff, 0x07, 0x1f, 0xf0, 0xff, 0xff, 0xfc, 0x1f,
  0xe1, 0xf8, 0x00, 0x07, 0xf0, 0x7f, 0xe0, 0xff, 0xff, 0x07, 0x1f, 0xf0, 0xff, 0xe7, 0xfc, 0x3f,
  0xe1, 0xf8, 0x03, 0xc7, 0xc1, 0xfc, 0x00, 0x7f, 0xff, 0x0f, 0x1f, 0xf0, 0xff, 0xc3, 0xf0, 0xff,
  0xe1, 0xf9, 0xe3, 0xff, 0x00, 0x00, 0x00, 0x7f, 0xfe, 0x0f, 0xff, 0xf0, 0xff, 0xe1, 0xe1, 0xff,
  0xe1, 0xff, 0xe3, 0xff, 0x00, 0x00, 0x3c, 0x7f, 0xfc, 0x1f, 0xff, 0xf0, 0xff, 0xf0, 0xc1, 0xff,
  0xe1, 0xff, 0xe3, 0xff, 0x0c, 0x00, 0x3e, 0x7f, 0xf8, 0x1f, 0xff, 0xf0, 0xff, 0xf0, 0x07, 0xff,
  0xe0, 0x30, 0x00, 0x03, 0xff, 0xc1, 0xfe, 0x7f, 0xf8, 0x3f, 0xff, 0xf0, 0xff, 0xfc, 0x0f, 0xff,
  0xe0, 0x30, 0x00, 0x03, 0xf1, 0xc1, 0xcf, 0xff, 0xf0, 0xff, 0xff, 0xf1, 0xff, 0xfe, 0x0f, 0xff,
  0x80, 0xf0, 0x00, 0x03, 0xe1, 0xc1, 0xc7, 0xff, 0xe0, 0xff, 0xff, 0xe1, 0xff, 0xff, 0x0f, 0xff,
  0x01, 0xff, 0xe3, 0xff, 0xe1, 0xc1, 0xe3, 0xff, 0xc1, 0xff, 0xff, 0xe3, 0xff, 0xff, 0x07, 0xff,
  0x0f, 0xff, 0xe3, 0xff, 0xc3, 0xc1, 0xf0, 0xff, 0x03, 0xff, 0xff, 0xc3, 0xff, 0xff, 0x83, 0xff,
  0x3f, 0xff, 0xe3, 0xff, 0x87, 0xc1, 0xf8, 0x7c, 0x0f, 0xff, 0xff, 0x87, 0xff, 0xff, 0xc3, 0xff,
  0xff, 0xff, 0xe3, 0xff, 0x0f, 0xc1, 0xf8, 0x38, 0x1f, 0xff, 0xff, 0x0f, 0xff, 0xff, 0xe3, 0xff,
  0xff, 0xc0, 0x00, 0x01, 0x1f, 0xc1, 0xfc, 0x38, 0x7f, 0xff, 0xff, 0x0f, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xc0, 0x00, 0x01, 0x3f, 0xc1, 0xfe, 0x3d, 0xff, 0xff, 0xfe, 0x1f, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xc0, 0x00, 0x01, 0xff, 0xc1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xc1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xe3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};


//I2Cに配列を転送する
void write_s(uint8_t *str1, uint8_t len1) {

  Wire.beginTransmission(0x3c);

  for (int ii = 0; ii < len1; ii++) {

    //一文字出力
    Wire.write(*str1++);

  }  //for

  Wire.endTransmission();

}  //write_s


//セットページアドレス
void setPageAddress(uint8_t start, uint8_t end) {
  uint8_t databytes[6] = { COMMAND_MODE, SET_PAGE_ADDRESS, COMMAND_MODE, start, COMMAND_MODE, end };
  write_s(databytes, 6);
}  //setPageAddress


//セットカラムアクセス
void setColumnAddress(uint8_t start, uint8_t end) {
  uint8_t databytes[6] = { COMMAND_MODE, SET_COLUMN_ADDRESS, COMMAND_MODE, start, COMMAND_MODE, end };
  write_s(databytes, 6);
}  //setColumnAddress


//セットメモリーアドレシングモード
void setMemoryAddressingMode() {
  uint8_t databytes[4] = { COMMAND_MODE, SET_MEMORY_ADDRESSING_MODE, COMMAND_MODE, HORIZONTAL_ADDRESSING_MODE };
  write_s(databytes, 4);
}  //setMemoryAddressingMode


//ドットを打つ
void Dot(int x, int y, int c) {
  //データの配列の定義
  static uint8_t databytes[2] = { DATA_MODE, 0x00 };
  static int qq = 0;  //一時

  qq = qq | (c << (y & 0x07));

  if ((y & 0x07) == 7) {  //1バイト分、貯まったら
    databytes[1] = qq;
    qq = 0;
    write_s(databytes, 2);  //I2Cに1バイト書き出す
  }                         //endif
}  //Dot


//再表示
void display(void) {

  //範囲の設定 (OLED内部のx,yカウンターを初期化してホームポジション0,0に)
  setPageAddress(0, MAX_PAGE);   // all pages
  setColumnAddress(0, MAX_COL);  // all columns

  // x × y の回数分、ループする
  int y, x, dot_1;
  for (int ii = 0; ii < 8192; ii++) {

    //SSD1306のバッファーの配置順のxとyを求める
    y = ((ii & 0b0001110000000000) >> 7) | (ii & 0b0111);
    x =  (ii & 0b0000001111111000) >> 3;

    //↓開始　「デカ文字」のメイン処理
    dot_1 = (kao_1[(y * (128 / 8)) + (x / 8)] >> (7 - (x & 7))) & 1;
    //↑終了

    if (dot_1 != 0) {
      Dot(x, y, 0);  //黒のドットを打つ
    } else {
      Dot(x, y, 1);  //白のドットを打つ
    }                //endif

  }  //for ii

}  //display


//SSD1306の初期化
void display_begin(void) {

  //I2Cの初期化
  Wire.begin();  //c0116
  delay(200);

  //SSD1306の初期化スペル(魔法)
  //0x80,0x8D,0x80,0x14,0x80,0xAF
  write_s((uint8_t *)"\200\215\200\024\200\257", 6);
  delay(100);

  //セットメモリーアドレシングモード (画面の終端に来たら画面の先頭に)
  setMemoryAddressingMode();

}  //display_begin


//初期化
void setup() {

  //SSD1306の初期化
  display_begin();

  //再表示
  display();

}  //setup


//メインループ
void loop() {
  delay(3);  //ダミー
}  //loop
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