# I2C SSD1306 Example

## Overview

This sample drives an SSD1306 OLED panel over I2C.

Source file:

```bash
src/rtsmart/examples/peripheral/i2c_ssd1306/test_i2c_ssd1306.c
```

## Sample Behavior

- initialize the display
- draw a checkerboard test pattern
- refresh the screen

## Key APIs

- `drv_fpioa_set_pin_func()`
- `drv_i2c_inst_create()` / `drv_i2c_inst_destroy()`
- `drv_i2c_transfer()`

## Build and Run

```bash
cd src/rtsmart/examples/peripheral/i2c_ssd1306
make
./test_i2c_ssd1306
```

## Notes

If your board uses different pins, bus numbering, or the `0x3D` address, update the source first.