arduino/libraries/mcu-renderer/docs/supported-devices.md

Supported devices

SDL

To test the graphics output on a PC, include the mcu-renderer-sdl.h file. You should also define the MCURENDERER_SDL preprocessor symbol in your project, so mcu-renderer-sdl.c gets compiled.

To initialize, call mr_sdl_init():

void mr_sdl_init(mr_t *mr,
                 uint32_t width,
                 uint32_t height,
                 enum mr_sdl_display_type_t display_type,
                 uint32_t upscale,
                 const char *title);

width and height specify the physical display size.

display_type allows simulating a color display (MR_SDL_DISPLAY_TYPE_COLOR) or a monochrome one (MR_SDL_DISPLAY_TYPE_MONOCHROME).

upscale lets you upscale the SDL display window.

title is the SDL display window's title.

ST7789

To start using mcu-renderer with an ST7789 color LCD display, first include the mcu-renderer-st7789.h file.

To initialize, call:

void mr_st7789_init(mr_t *mr,
                    int16_t width,
                    int16_t height,
                    mr_display_rotation_t rotation,
                    uint8_t *textbuffer,
                    uint32_t textbuffer_size,
                    mr_sleep_callback_t sleep_callback,
                    mr_set_reset_callback_t set_reset_callback,
                    mr_set_command_callback_t set_command_callback,
                    mr_send_callback_t send_callback,
                    mr_send_callback_t send16_callback);

width and height specify the physical display size. rotation allows you to rotate the screen.

textbuffer is a user-provided framebuffer that should be capable of holding at least two characters, of minimum size 2 * font_boundingbox_width * font_boundingbox_height. If this framebuffer is too small, text will not render correctly.

sleep_callback, set_reset_callback, set_command_callback, send_callback and send16_callback are user-provided callbacks. They should, respectively, delay the processor a certain number of milliseconds, set the display's reset line (RESX or RES), set the display's command/data line (DCX, DC or A0) and send 8-bit and 16-bit data to the display.

mcu-renderer's display initialization is bare-bones. After calling mr_st7789_init() you should send a customized initialization sequence with mr_send_sequence().

ILI9341

Use of the ILI9341 display is similar to the ST7789, except:

• you must include the mcu-renderer-ili9341.h file.
• you must call the mr_ili9341_init() function.

ST7565

To start using mcu-renderer with an ST7565 monochrome LCD display, include the mcu-renderer-st7565.h file.

To initialize, call:

void mr_st7565_init(mr_t *mr,
                    int16_t width,
                    int16_t height,
                    mr_display_rotation_t rotation,
                    uint8_t *framebuffer,
                    mr_sleep_callback_t sleep_callback,
                    mr_set_reset_callback_t set_reset_callback,
                    mr_set_command_callback_t set_command_callback,
                    mr_send_callback_t send_callback);

width and height specify the physical display size. rotation allows you to rotate the screen.

framebuffer is a user-provided framebuffer of size (width * (height + 7) / 8).

sleep_callback, set_reset_callback, set_command_callback and send_callback are user-provided callbacks. They should, respectively, delay the processor a certain number of milliseconds, set the display's reset line (RESX or RES), set the display's command/data line (DCX, DC or A0) and send 8-bit data to the display.

mcu-renderer's display initialization is bare-bones. After calling mr_st7565_init() you should send a customized initialization sequence with mr_send_sequence().