SSD1306-Cube

I2C SSD1306 Library for STM32Cube
Based on Adafruit-SSD1306 and Adafruit GFX Library

Usage

This library can use DMA to write to the display. To enable it, configure DMA for the I2C peripheral associated to the display and uncomment line 7 in ssd1306.h

Initializing the display

Before using the display, it must be initialized with ssd1306Begin.
ssd1306Begin takes four parameters: display mode, a pointer to the I2C Handler, width and height.
Example: ssd1306Begin(SSD1306_SWITCHCAPVCC, &hi2c1, 128, 64);

Using the display

The functions used to draw to the display are similar to the ones used in Adafruit-SSD1306 and Adafruit GFX Library and are quite self-explanatory.

In ssd1306.h:
flushDisplay() updates the display with framebuffer contents in memory.
clearDisplay() clears the framebuffer without flushing it to the display.
void drawPixel(int16_t x, int16_t y, uint16_t color);
void drawBitmap(int16_t x, int16_t y, const uint8_t bitmap[], int16_t w, int16_t h, uint16_t color);
void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
In gfx.h:
void drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);
void drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
void drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size_x, uint8_t size_y);
void setCursor(int16_t x, int16_t y);
void setTextColor(uint16_t c, uint16_t bg);
void setTextSize(uint16_t s);
void writeChar(char c); takes a single character and prints it at the current cursor position
void printString(char s[]); takes a string and prints it at the current cursor position

If you need to redirect printf output to the display, add the following function to your code:

int __io_putchar(int ch) {
	writeChar(ch);
    return ch;
}