SSD1306 64x128 on I2C C library for ESP-IDF apps
WiP
This repo contains code to run the ssd1306 oled display on I2C for ESP32. I am targeting this at the Heltec ESP32.
To use it, clone the repository in the component directory of your project.
API
The API is super simple:
/* Initialize the sd1306 and return a new frame buffer */
ssd1306_framebuffer_t *ssd1306_new();
/* Free the framebuffer */
void ssd1306_free(ssd1306_framebuffer_t *screen);
/* Set display contrast
* @param contrast Amount of contrast 0x00-0xFF
*/
void ssd1306_display_contrast(uint8_t contrast);
/* Add a bitmap to the virtual screen, starting at the specified location
* @param framebuffer The device framebuffer
* @param x Starting column
* @param y Starting row
* @param bitmap Bitmap to add
* @param rows Bitmap width
* @param cols Bitmap height
*/
void ssd1306_add_bitmap(ssd1306_framebuffer_t *framebuffer, int32_t x, int32_t y, uint8_t *const bitmap, uint16_t rows, uint16_t cols);
/* Add a null terminated string to the virtual screen, starting at the specified location.
Works with multiline as well
* @param framebuffer The device framebuffer
* @param x Starting column
* @param y Starting row
* @param text Text to write into the framebuffer
*/
void ssd1306_add_text(ssd1306_framebuffer_t *framebuffer, int32_t x, int32_t y, char *const text);
/* Clear the vistual screen
* @param framebuffer The device framebuffer
*/
void ssd1306_clear(ssd1306_framebuffer_t *framebuffer);
/* Draw the virtual screen on the ssd1306
* @param framebuffer The device framebuffer
*/
void ssd1306_draw(ssd1306_framebuffer_t *const framebuffer);