(SSD1306)2chレベルメーターで遊ぶ(M5Stamp S3)(入力ランダム)


x 過去ログを見よ!!

![o_coq212.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/840352/68fa8991-7d90-1dca-b174-a1cf7a60dc04.jpeg)



```c++


//秋月のOLEDとアイテンドウのOLEDのアドレスは3C
//ssd1306_level_meter_r1_S3_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


//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


//座標
int SO_X = 0;
int SO_Y = 0;

//8ドット分のデータ
char dot_1ch[8];
char dot_2ch[8];

//ブロックカウント
char b_count = 0;

//パターンRAMの内容を液晶に転送
void level_meter(int L1, int L2) {

  //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

  //yのループ
  for (SO_Y = 0; SO_Y < 64; SO_Y++) {

    if (L1 >= SO_Y){dot_1ch[b_count] = 1;}else{dot_1ch[b_count] = 0;}
    if (L2 >= SO_Y){dot_2ch[b_count] = 1;}else{dot_2ch[b_count] = 0;}

    b_count++;
    //b_count = 7; //debug
    if (b_count > 7 ) {

      //L1 L1 L1 vL1 L1 L1 L1 L1 L1
      int a; //一時
      //データの配列の定義
      uint8_t databytes[2] = {DATA_MODE, 0x00};

      //空白1
      for (int x = 0; x < (8 * 2); x++) {
        databytes[1] = 0x00;
        write_s(databytes, 1+1);
      }//for
      
      //L1 L1 L1 L1 L1 L1 L1 L1 L1 L1
      a = 0;
      if(dot_1ch[0] != 0 ) {a = a | 0b00000001;}
      if(dot_1ch[1] != 0 ) {a = a | 0b00000010;}
      if(dot_1ch[2] != 0 ) {a = a | 0b00000100;}
      if(dot_1ch[3] != 0 ) {a = a | 0b00001000;}
      if(dot_1ch[4] != 0 ) {a = a | 0b00010000;}
      if(dot_1ch[5] != 0 ) {a = a | 0b00100000;}
      if(dot_1ch[6] != 0 ) {a = a | 0b01000000;}
      if(dot_1ch[7] != 0 ) {a = a | 0b10000000;}
      for (int x = 0; x < (8 * 4); x++) {
        //a = 0x55;
        databytes[1] = a;
        write_s(databytes, 2);
      }//for x

      //空白2
      for (int x = 0; x < (8 * 4); x++) {
        databytes[1] = 0x00;
        write_s(databytes, 1+1);
      }//for

      //L2 L2 L2 L2 L2 L2 L2 L2 L2
      a = 0;
      if(dot_2ch[0] != 0 ) {a = a | 0b00000001;}
      if(dot_2ch[1] != 0 ) {a = a | 0b00000010;}
      if(dot_2ch[2] != 0 ) {a = a | 0b00000100;}
      if(dot_2ch[3] != 0 ) {a = a | 0b00001000;}
      if(dot_2ch[4] != 0 ) {a = a | 0b00010000;}
      if(dot_2ch[5] != 0 ) {a = a | 0b00100000;}
      if(dot_2ch[6] != 0 ) {a = a | 0b01000000;}
      if(dot_2ch[7] != 0 ) {a = a | 0b10000000;}
      for (int x = 0; x < (8 * 4); x++) {
        //a = 0xaa;
        databytes[1] = a;
        write_s(databytes, 2);
      }//for x

      //空白3
      for (int x = 0; x < (8 * 2); x++) {
        databytes[1] = 0x00;
        write_s(databytes, 1+1);
      }//for

      b_count = 0;

    }//end if b_count

  }//for SO_Y

  //while(1){} //debug

}//Sound_Oscilloscope


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

  //I2Cの初期化
  Wire.begin(); //C011
  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();

  //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

}//display_begin


//初期化
void setup() {

  //SSD1306の初期化
  display_begin();

}//setup


//メインループ
void loop() {

  static int L1 = 0;
  static int L2 = 0;

  L1 = random(64);
  L2 = random(64);

  level_meter(L1, L2); //画面の再表示

  //delay(1000); //1秒待つ debug

}//loop


```