Quick Start Guide for the graphics service

This is the quick start guide for the Graphics (GFX) service", with step-by-step instructions on how to configure and use it for a specific use case.

Basic usage of the graphics service

This use case will demonstrate initializing the graphics service and then drawing a red line on the screen from coordinate X=10, Y=10 to X=20, Y=20.

Workflow

Example code

Add to, e.g., the main function in the application C-file:

board_init();
sysclk_init();
gfx_init();
gfx_draw_line(10, 10, 20, 20, GFX_COLOR(0xFF, 0, 0));

Workflow

1. Initialize board IO:

   • board_init(); 

2. Initialize clocks:

   • sysclk_init(); 

3. Initialize graphics service

   • gfx_init(); 

   • Note

     This will call the init function for the low level display controller driver and initialize the screen to a white background.

4. Draw a red line from 10,10 to 20,20:

• gfx_draw_line(10, 10, 20, 20, GFX_COLOR(0xFF, 0, 0)); 

• Attention

  This uses the GFX_COLOR macro to convert a RGB (Red,Green,Blue) value to a color value native to the display. In this case the color is a constant, so we use the macro. If you need to create the color from a non-constant value you must use the gfx_color function to generate the color.