Open source Raspberry Pi C++ library for I2C displays (OLED / LCD)

[Arjan van Vught]

https://github.com/vanvught/rpidmx512/tree/master/lib-display

Supported I2C displays:

• BitWizard LCD Interface with 16x2 LCD
• BitWizard User Interface with 16x2 LCD
• LCD Module TC1602A / PCF8574T I2C
• LCD Module 2004 / PCF8574T I2C
• OLED display 128x32 SSD1306 I2C
• OLED display 128x64 SSD1306 I2C

Supported platforms :

•  Linux Raspbian
• Prerequisite: C library for Broadcom BCM 2835 as used in Raspberry Pi (http://www.airspayce.com/mikem/bcm2835/)
•  Bare-metal
•  Prerequisite: https://github.com/vanvught/rpidmx512/tree/master/lib-bcm2835

Examples are available:

detect.cpp

int main(int argc, char **argv) {
    Display display(0, 8);

    bool isDetected = display.isDetected();

    printf("Display is detected : %s\n", isDetected ? "Yes" : "No");

    if (isDetected) {
        printf("Display type : %d\n", (int) display.GetDetectedType());
        display.Printf(2, "Line 2");
    }

    return 0;
}

oled128x32.cpp

int main(int argc, char **argv) {
    Ssd1306 ssd1306(OLED_PANEL_128x32_4ROWS);

    bool isDetected = ssd1306.Start();

    printf("Display is detected : %s\n", isDetected ? "Yes" : "No");

    if (isDetected) {
        for (int i = 1; i <= 4; i++) {
            ssd1306.TextLine(i, line, sizeof(line) - 1);
            ssd1306.PutChar((int) '0' + i);
        }
    }

   return 0;
}

ssd1306.cpp

int main(int argc, char **argv) {
    Display display(DISPLAY_SSD1306);

    bool isDetected = display.isDetected();

    printf("Display is detected : %s\n", isDetected ? "Yes" : "No");

    if (isDetected) {
        printf("Display type : %d\n", (int) display.GetDetectedType());
        for (int i = 1; i <= 8; i++) {    // We assume OLED_PANEL_128x64_8ROWS
            display.Printf(i, "Line %d", (int) i);
        }
    }

    return 0;
}