c ++ arduino结构化数组中的多个显示对象

Question

我通过 8 通道 i2c Mux 声明了多个 OLED 显示器运行：

Adafruit_SSD1306 display1(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET);
Adafruit_SSD1306 display2(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET);
Adafruit_SSD1306 display3(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET);
Adafruit_SSD1306 display4(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET);
Adafruit_SSD1306 display5(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET);

我希望能够使用这样的标识符访问这些内容：

display[0].print("etc");
display[1].print("etc");
display[2].print("etc");

所以我可以调用这样的函数：

sendTitleDisplay(1);

void sendTitleDisplay(uint8_t id)
{
   display[id].print("title example");
}

我将如何定义这些对象以便我可以以这种数组格式访问它们？

Answer 1

您可以像这样初始化数组：

Adafruit_SSD1306 display[]{
    {SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET},
    {SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET},
    {SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET},
    {SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET},
    {SCREEN_WIDTH, SCREEN_HEIGHT, &Wire2, OLED_RESET},
};

这将为每个 Adafruit_SSD1306 实例使用第一个新推荐的构造函数，clkDuring 使用默认值 400000UL，clkAfter 使用默认值值 100000UL.

// NEW CONSTRUCTORS -- recommended for new projects
Adafruit_SSD1306(uint8_t w, uint8_t h, TwoWire *twi = &Wire,
                 int8_t rst_pin = -1, uint32_t clkDuring = 400000UL,
                 uint32_t clkAfter = 100000UL);

Adafruit_SSD1306(uint8_t w, uint8_t h, int8_t mosi_pin, int8_t sclk_pin,
                 int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);

Adafruit_SSD1306(uint8_t w, uint8_t h, SPIClass *spi, int8_t dc_pin,
                 int8_t rst_pin, int8_t cs_pin, uint32_t bitrate = 8000000UL);

// DEPRECATED CONSTRUCTORS - for back compatibility, avoid in new projects
Adafruit_SSD1306(int8_t mosi_pin, int8_t sclk_pin, int8_t dc_pin,
                 int8_t rst_pin, int8_t cs_pin);

Adafruit_SSD1306(int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);

Adafruit_SSD1306(int8_t rst_pin = -1);

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