Daisy Seed OLED 1306 I2C/ 2 Wire (gnd, vcc, slc, sda)

Example of using OLED with Electrosmith Daisy Seed music microcontroller.

Wiring

Fork / Clone ( https://github.com/electro-smith/DaisyExamples/tree/master )

Copy OLED example

Use the helper script to copy the OLED example into a new folder.

./helper.py copy seed/IC2_OLED --source seed/OLED

Change directories into the new folder:

cd ./seed/IC2OLED

Config the copied OLED code

#include <stdio.h>
#include <string.h>
#include "daisy_seed.h"
#include "dev/oled_ssd130x.h"

using namespace daisy;

/** Typedef the OledDisplay to make syntax cleaner below 
 *  This is a 2Wire I2C Transport controlling an 128x64 sized SSDD1306
 * 
 *  There are several other premade test 
*/
using MyOledDisplay = OledDisplay<SSD130xI2c128x32Driver>;

DaisySeed     hw;
MyOledDisplay display;

int main(void)
{
    uint8_t message_idx;
    hw.Configure();
    hw.Init();

    /** Configure the Display */
    MyOledDisplay::Config display_config;

    display_config.driver_config.transport_config.i2c_address = 0x3C;
    display_config.driver_config.transport_config.i2c_config.periph = I2CHandle::Config::Peripheral::I2C_1;
    display_config.driver_config.transport_config.i2c_config.speed  = I2CHandle::Config::Speed::I2C_100KHZ;
    display_config.driver_config.transport_config.i2c_config.mode = I2CHandle::Config::Mode::I2C_MASTER;
    display_config.driver_config.transport_config.i2c_config.pin_config.scl = {DSY_GPIOB, 8};
    display_config.driver_config.transport_config.i2c_config.pin_config.sda = {DSY_GPIOB, 9};

    display.Init(display_config);
    
    /** And Initialize */
    display.Init(display_config);

    message_idx = 0;
    char strbuff[128];
    while(1){
        System::Delay(500);
        switch(message_idx){
            case 0: sprintf(strbuff, " Testing. . ."); break;
            case 1: sprintf(strbuff, " Daisy. . ."); break;
            case 2: sprintf(strbuff, " 1. . ."); break;
            case 3: sprintf(strbuff, " 2. . ."); break;
            case 4: sprintf(strbuff, " 3. . ."); break;
            default: break;
        }
        message_idx = (message_idx + 1) % 5;

        display.SetCursor(0, 0);
        display.WriteString(strbuff, Font_7x10, true);
        display.Update();
    }
}

Compile

make .

Reset seed

Press both white buttons.

Upload

make program-dfu

Why DSY_GPIOB, 8 and DSY_GPIOB, 9?

display_config.driver_config.transport_config.i2c_config.pin_config.scl = {DSY_GPIOB, 8};
display_config.driver_config.transport_config.i2c_config.pin_config.sda = {DSY_GPIOB, 9};

Why Ox3C?