ST7789とSTM32G031を使い白黒表示


ST7789とSTM32G031を使い白黒表示


![o_cop802.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/840352/4ddd0f33-03ec-7880-6254-001072b00bfc.jpeg)



```c++


//ili9341_SPI_monotone_REG1_031


//ヘッダーファイル
#include <Adafruit_GFX.h>
#include "hh.h"

//定義
#define SCREEN_WIDTH  (240-16-16) // OLED display width, in pixels
#define SCREEN_HEIGHT 200 // OLED display height, in pixels
NA_ST7735_P display(SCREEN_WIDTH, SCREEN_HEIGHT);


// ビットマップデータ
uint8_t databytes[8] =

{

  0b01100110,
  0b10101111,
  0b10111111,
  0b11011111,

  0b01111110,
  0b01111110,
  0b00111100,
  0b00011000

};


//初期化
void setup() {

  // I2Cアドレスは使用するディスプレイに合わせて変更する
  display.begin();

}//setup


//メインループ
void loop() {

  // 画面表示をクリア
  display.clearDisplay();

  //ビットマップの表示
  display.drawBitmap(2, 2, databytes, 8, 8,  WHITE);



  // テキストサイズを設定
  display.setTextSize(3);
  // テキスト色を設定
  display.setTextColor(WHITE);
  // テキストの開始位置を設定
  display.setCursor(20, 20);


  // 1行目に46を表示
  display.println("ST7789V2");

  // 画面の左側に長方形(塗りつぶしなし)を描画
  // display.drawRect(左上x, 左上y, 幅, 高さ, 線の色)
  //display.drawRect(0, 0, 239, 59, WHITE);
  //display.drawRect(0, 0, 199, 160, WHITE);

  // 描画バッファの内容を画面に表示
  display.display();

  delay(3000); //1秒待つ

  // 1行目に46を表示
  display.println("ST7789V2");

  // 描画バッファの内容を画面に表示
  display.display();

  delay(3000); //1秒待つ


}//loop


```



hh.cpp


```c++


//インクルド
#include "hh.h"
#include <Adafruit_GFX.h>


//定義
#define NA_ST7735_P_swap(a, b)                                                     \
  (((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b))) ///< No-temp-var swap operation
//GPIOの設定1　開始
//GPIO
#define DW    digitalWrite
//#define TFT_RST   A1
#define TFT_RS    PA11
#define TFT_CS    PA0
//#define GPIO_RESET(s)  DW(TFT_RST,s)
#define GPIO_RS(s)     DW(TFT_RS,s)
#define GPIO_CS(s)     DW(TFT_CS,s)

#define TFT_MOSI PA12
#define TFT_SCK  PB7
#define SPI_MOSI_HIGH() DW(TFT_MOSI,HIGH)
#define SPI_MOSI_LOW()  DW(TFT_MOSI,LOW)
#define SPI_SCK_HIGH()  DW(TFT_SCK,HIGH)
#define SPI_SCK_LOW()   DW(TFT_SCK,LOW)


void SPI_WRITE8(int s)
{
  for (int bit = 0, x = s; bit < 8; bit++) {
    if (x & 0x80) {
      SPI_MOSI_HIGH();
      SPI_SCK_HIGH();
      SPI_SCK_LOW();
    } else {
      SPI_MOSI_LOW();
      SPI_SCK_HIGH();
      SPI_SCK_LOW();
    }//end if
    x <<= 1;
  }//for
}//SPI_WRITE8


void SPI_WRITE8_A(int s)
{
  for (int bit = 0, x = s; bit < 8; bit++) {
    if (x & 0x80) {

      //              m C
      //      5432109876543210
      GPIOA->ODR  = GPIOA->ODR | 0b0000000010000000;

      //              m C
      //      5432109876543210
      GPIOA->ODR  = GPIOA->ODR | 0b0000000000100000;

      //              m C
      //      5432109876543210
      GPIOA->ODR  = GPIOA->ODR & 0b1111111111011111;

    } else {

      //              m C
      //      5432109876543210
      GPIOA->ODR  = GPIOA->ODR & 0b1111111101111111;

      //              m C
      //      5432109876543210
      GPIOA->ODR  = GPIOA->ODR | 0b0000000000100000;

      //              m C
      //      5432109876543210
      GPIOA->ODR  = GPIOA->ODR & 0b1111111111011111;

    }//end if
    x <<= 1;
  }//for
}//SPI_WRITE8


void NA_ST7735_P::GPIO_8BIT(uint8_t s)
{
  SPI_WRITE8(s);
} //GPIO_8BIT


//コマンドの書き込み
void NA_ST7735_P::LCD_Write_CMD(uint8_t a)
{
  GPIO_CS(0);//CS=0; 12
  GPIO_RS(0); //A0=0; 9
  GPIO_8BIT(a);//P1=a; data SPI SPI
  GPIO_CS(1);//CS=1; 12
} //LCD_Write_CMD


//データ書き込み
void NA_ST7735_P::LCD_Write_Data(uint8_t a)
{
  GPIO_CS(0);//CS=0; 12
  GPIO_RS(1); //A0=1; 9
  GPIO_8BIT(a);//P1=a; data SPI SPI
  GPIO_CS(1);//CS=1; 12
} //LCD_Write_Data


//液晶の初期化処理
void NA_ST7735_P::TXDT144TF_ST7735S_Init(void)
{

  //GPIO_RESET(1);//LCD_RESET=1;
  //delay(1); //Delay 1ms

  //GPIO_RESET(0);//LCD_RESET=0;
  //delay(1); //Delay 1ms

  //GPIO_RESET(1);//LCD_RESET=1;
  //delay(120); //Delay 120ms



  LCD_Write_CMD(0x01);//SOFTWARE RESET
  delay(50);

  LCD_Write_CMD(0x01);//SOFTWARE RESET
  delay(50);

  LCD_Write_CMD(0x11);//SLEEP OUT
  delay(200);

  LCD_Write_CMD(0x29);//display on
  delay(100);

  LCD_Write_CMD(0x36);//RGB-RGR format
  LCD_Write_Data(0x00);//RGB mode
  delay(100);

  LCD_Write_CMD(0x3a);//Interface pixel format
  LCD_Write_Data(0x55);//16bit mode
  delay(100);

  LCD_Write_CMD(0x21); //Reverse
  delay(100);




} //TXDT144TF_ST7735S_Init


NA_ST7735_P::NA_ST7735_P(uint16_t w, uint16_t h)
  : Adafruit_GFX(w, h), buffer(NULL)

{
}


//バッファのクリア
NA_ST7735_P::~NA_ST7735_P(void) {
  if (buffer) {
    free(buffer);
    buffer = NULL;
  }
}//~NA_ST7735_P


//初期処理
bool NA_ST7735_P::begin(void) {

  if ((!buffer) && !(buffer = (uint8_t *)malloc(WIDTH * ((HEIGHT + 7) / 8))))
    return false;

  //バッファーのクリア
  clearDisplay();

  //ポートのモード設定　アウトプットモード
  pinMode(TFT_CS, OUTPUT);
  //pinMode(TFT_RST, OUTPUT);
  pinMode(TFT_RS, OUTPUT);

  pinMode(TFT_MOSI, OUTPUT);
  pinMode(TFT_SCK , OUTPUT);


  //ポートの初期化
  GPIO_CS(1);//CS=1
  //GPIO_RESET(1);//RESET=1
  GPIO_RS(0);//RS=0


  delay(500); //0.5秒待つ

  //液晶の初期化処理
  TXDT144TF_ST7735S_Init();

  //画面の書き込み開始
  //display();

  return true; // Success
}//begin


//点の表示
void NA_ST7735_P::drawPixel(int16_t x, int16_t y, uint16_t color) {
  if ((x >= 0) && (x < width()) && (y >= 0) && (y < height())) {
    // Pixel is in-bounds. Rotate coordinates if needed.
    switch (getRotation()) {
      case 1:
        NA_ST7735_P_swap(x, y);
        x = WIDTH - x - 1;
        break;
      case 2:
        x = WIDTH - x - 1;
        y = HEIGHT - y - 1;
        break;
      case 3:
        NA_ST7735_P_swap(x, y);
        y = HEIGHT - y - 1;
        break;
    }
    switch (color) {
      case NA_ST7735_P_WHITE:
        //0      239
        //1      238
        //2      237
        //x = (WIDTH - 1) - x;
        buffer[(x / 8) +    (y * 26)  ] |=  (1 << (7 - (x & 7)));
        break;
      case NA_ST7735_P_BLACK:
        //x = (WIDTH - 1) - x;
        buffer[(x / 8) +    (y * 26)  ] &= ~(1 << (7 - (x & 7)));
        break;
      case NA_ST7735_P_INVERSE:
        //x = (WIDTH - 1) - x;
        buffer[(x / 8) +    (y * 26)  ] ^=  (1 << (7 - (x & 7)));
        break;
    }
  }
}


//バッファのクリア
void NA_ST7735_P::clearDisplay(void) {
  memset(buffer, 0, WIDTH * ((HEIGHT + 7) / 8));
}


bool NA_ST7735_P::getPixel(int16_t x, int16_t y) {
  if ((x >= 0) && (x < width()) && (y >= 0) && (y < height())) {
    // Pixel is in-bounds. Rotate coordinates if needed.
    switch (getRotation()) {
      case 1:
        NA_ST7735_P_swap(x, y);
        x = WIDTH - x - 1;
        break;
      case 2:
        x = WIDTH - x - 1;
        y = HEIGHT - y - 1;
        break;
      case 3:
        NA_ST7735_P_swap(x, y);
        y = HEIGHT - y - 1;
        break;
    }
    x = (WIDTH - 1) - x;
    return (buffer[x + (y / 8) * WIDTH] & (1 << (y & 7)));
  }
  return false; // Pixel out of bounds
}


uint8_t *NA_ST7735_P::getBuffer(void) {
  return buffer;
}


void NA_ST7735_P::display(void) {

  uint8_t *ptr = buffer;

  //画面の書き込み開始
  LCD_Write_CMD(0x2C); //memory write

  GPIO_RS(1); //A0=1; 9

  int jjk = 0, vg = 0;
  int hp[8] = {0x80, 0x40, 0x20, 0x10,  0x08, 0x04, 0x02, 0x01};

//20
for (int ooi = 0; ooi < (240*20); ooi++) {
          GPIO_CS(0);
          SPI_WRITE8(0b00000000);
          GPIO_CS(1);

          GPIO_CS(0);
          SPI_WRITE8(0b00000000);
          GPIO_CS(1);
}
  
  for (int i = 0; i < HEIGHT; i++) {


//20
for (int ooi = 0; ooi < 16; ooi++) {
          GPIO_CS(0);
          SPI_WRITE8(0b00000110);
          GPIO_CS(1);

          GPIO_CS(0);
          SPI_WRITE8(0b11100000);
          GPIO_CS(1);
}
    
    for (int j = 0; j < ((WIDTH / 8)); j++) {

      vg = ptr[jjk];
      //vg = 0xff;
      for (int k = 0; k < 8; k++) {
        if ( ( vg & hp[k]) == 0 ) {

          GPIO_CS(0);
          SPI_WRITE8(0);
          GPIO_CS(1);

          GPIO_CS(0);
          SPI_WRITE8(0);
          GPIO_CS(1);

        } else {

          GPIO_CS(0);
          SPI_WRITE8(0xff);
          GPIO_CS(1);

          GPIO_CS(0);
          SPI_WRITE8(0xff);
          GPIO_CS(1);
          
        }//end if
      }//k
      jjk++;

    } //j


//20
for (int ooi = 0; ooi < 16; ooi++) {
          GPIO_CS(0);
          SPI_WRITE8(0b00000110);
          GPIO_CS(1);

          GPIO_CS(0);
          SPI_WRITE8(0xb11100000);
          GPIO_CS(1);
}  

  
  }//i

//20
for (int ooi = 0; ooi < (240*20); ooi++) {
          GPIO_CS(0);
          SPI_WRITE8(0b00000000);
          GPIO_CS(1);

          GPIO_CS(0);
          SPI_WRITE8(0b00000000);
          GPIO_CS(1);
}

}//display


```


hh.h


```c++


#ifndef _NA_ST7735_P_H_
#define _NA_ST7735_P_H_

#include <Adafruit_GFX.h>

#ifndef NO_ADAFRUIT_NA_ST7735_P_COLOR_COMPATIBILITY
#define BLACK NA_ST7735_P_BLACK     ///< Draw 'off' pixels
#define WHITE NA_ST7735_P_WHITE     ///< Draw 'on' pixels
#define INVERSE NA_ST7735_P_INVERSE ///< Invert pixels
#endif
/// fit into the SSD1306_ naming scheme
#define NA_ST7735_P_BLACK 0   ///< Draw 'off' pixels
#define NA_ST7735_P_WHITE 1   ///< Draw 'on' pixels
#define NA_ST7735_P_INVERSE 2 ///< Invert pixels


class NA_ST7735_P : public Adafruit_GFX {
  public:

    NA_ST7735_P(uint16_t w, uint16_t h);

    ~NA_ST7735_P(void);

    bool begin(void);
    void display(void);
    void clearDisplay(void);
    void drawPixel(int16_t x, int16_t y, uint16_t color);
    bool getPixel(int16_t x, int16_t y);
    uint8_t *getBuffer(void);

    void GPIO_8BIT(uint8_t s);
    void LCD_Write_CMD(uint8_t ww);
    void LCD_Write_Data(uint8_t ii);
    void TXDT144TF_ST7735S_Init(void);


  protected:


    uint8_t *buffer; ///< Buffer data used for display buffer. Allocated when
    ///< begin method is called.

};

#endif // _NA_ST7735_P_H_


```