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Update flowchart & add hw scheme

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@ -42,82 +42,118 @@ Prior defined for MCU Atmega328p / Atmega8 / Atmega16. Need to be carefull with
| SCL | PC0 | PC5 |
| SDA | PC1 | PC4 |
### Picture of hardware connection
<img src="img/connection.png" alt="Hardware connection" width="600">
### Tested
Library was tested and proved with **_0.96″ 128x64 and 128x32 OLED Display (SSD1306 driver)_** and **_Atmega328p_**.
Library was tested and proved with **_0.96″ 128x64 and 0.91" 128x32 OLED Display (SSD1306 driver)_** and **Arduino UNO R3**. The Arduino was without a bootloader installed, it was only raw Atmega328P microcontroller. Communication was done through I2C (TWI) interface of Arduino UNO R3. This hardware configuration was chosen for simplicity.
## Init OLED Sequence
Init sequence OLED display was defined according to page 64 (next to last page) of [Datasheet SSD1306](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf).
Init sequence OLED display was defined mainly according to page 64 (next to last page) of [Datasheet SSD1306](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf).
### Flowchart
```
// +---------------------------+
// | Software Reset | // not tested yet, @source https://github.com/SmingHub/Sming/issues/501
// +---------------------------+
// | 0xE4 |
// +---------------------------+
// ||
// +---------------------------+
// | DISPLAY OFF |
// +---------------------------+
// | 0xAE |
// +---------------------------+
// ||
// +---------------------------+
// | Set MUX Ratio |
// +---------------------------+
// | 0xA8, 0x3F |
// | 0xA8 |
// | 0x3F |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set Display Offset |
// | Set Memory Addr Mode |
// +---------------------------+
// | 0xD3, 0x00 |
// | 0x20 |
// | 0x00 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set Display Start Line |
// | Set Start Line |
// +---------------------------+
// | 0x40 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set Display Offset |
// +---------------------------+
// | 0xD3 |
// | 0x00 |
// +---------------------------+
// ||
// +---------------------------+
// | Set Segment Remap |
// +---------------------------+
// | 0xA0 / 0xA1 |
// | 0xA0 or 0xA1 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set COM Output Scan |
// | Direction |
// +---------------------------+
// | 0xC0 / 0xC8 |
// | 0xC0 or 0xC8 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set COM Pins hardware |
// | configuration |
// +---------------------------+
// | 0xDA, 0x02 |
// | 0xDA |
// | 0x02 for 128x64 |
// | 0x02 for 128x32 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set Contrast Control |
// +---------------------------+
// | 0x81, 0x7F |
// | 0x81 |
// | 0x7F |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Disable Entire Display On |
// +---------------------------+
// | 0xA4 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set Normal Display |
// +---------------------------+
// | 0xA6 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Set Osc Frequency |
// | Set OSC Frequency Fosc |
// +---------------------------+
// | 0xD5, 0x80 |
// | 0xD5 |
// | 0x80 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Enable charge pump |
// | regulator |
// +---------------------------+
// | 0x8D, 0x14 |
// | 0x8D |
// | 0x14 |
// +---------------------------+
// |
// ||
// +---------------------------+
// | Deactivate Scroll |
// +---------------------------+
// | 0x2E |
// +---------------------------+
// ||
// +---------------------------+
// | Display On |
// +---------------------------+
@ -150,4 +186,3 @@ Init sequence OLED display was defined according to page 64 (next to last page)
## Links
- [Datasheet SSD1306](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf)
- [Atmega328](https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf)