Simple skull animation on Arduino Uno R3 and WaveShare 0.96inch OLED (B) display. Frames are compressed and decompress by Huffman algorithm to fit into 32 KB flash memory. Project uses two great libraries: avr-hal and modified ssd1306 driver to bypass buffering (and save memory).
- SSD1306 Display - WaveShare 0.96inch OLED (B) - connected to 4-wire SPI (default case)
Arduino Uno R3 has one Serial Peripheral Interface (SPI) controller with predefined pins. In this case CIPO (D12) is not used.
| Arduino Pin | Name | Other common names | Description |
|---|---|---|---|
| D10 | SS | CS, nCS, CSB, CSN, nSS, STE, SYNC | Chip Select |
| D11 | COPI | MOSI, SIMO, SDO, DO, DOUT, SO, MTSR | Master out, slave in |
| D12 | CIPO | MISO, SOMI, SDI, DI, DIN, SI, MRST | Master in, slave out |
| D13 | SCK | SCLK, CLK | Serial Clock |
WaveShare 0.96inch (SSD1306) configured in 4-wire mode.
| OLED Pin - signatures on the device | Description in 4-wire mode | Connected with Arduino Pin |
|---|---|---|
| VCC | +3.3V/+5V Power input | +5V |
| GND | Ground | GND |
| NC | - | Not used |
| DIN | COPI (MOSI - Master out, slave in) | D11 |
| CLK | SCK (SCLK - Clock input) | D13 |
| CS | CS (Chip select, low active) | D10 |
| D/C | Command signal, low level for command, high level for data | D7 |
| RES | Reset signal, low active | D8 |
To compile and run automatically on Arduino:
$ cargo run --release