reidfo/legatoapp_lvgl

Integrate LittlevGL into Legato app

This project demonstrates how to integrate LittlevlGL into a Legato app. The necessary LittlevGL dependencies are referenced by this repository as git submodules.

Setup

1. Clone this repository with the --recursive option so that the submodules are retrieved as well.
2. cp littlevLegatoComponent/littlevgl/lvgl/lv_conf_templ.h littlevLegatoComponent/littlevgl/lv_conf.h
3. cp littlevLegatoComponent/littlevgl/lv_drivers/lv_drv_conf_templ.h littlevLegatoComponent/littlevgl/lv_drv_conf.h
4. Make the following changes to littlevLegatoComponent/littlevgl/lv_conf.h:
   1. At the top of the file, change the #if 0 to #if 1 to enable the file
   2. Update logical dimension of screen for waveshare eink 2.13 Inch:

      #define LV_HOR_RES          (122)
      #define LV_VER_RES          (250)

   3. Update default font type to use monochrome font:

      #define LV_FONT_DEFAULT        &lv_font_monospace_8

   4. Enable font size 8 for monochrome display and disable unsupported font:

      #define USE_LV_FONT_DEJAVU_10              0
      #define USE_LV_FONT_DEJAVU_10_LATIN_SUP    0
      #define USE_LV_FONT_DEJAVU_10_CYRILLIC     0
      #define USE_LV_FONT_SYMBOL_10              0
      
      #define USE_LV_FONT_DEJAVU_20              0
      #define USE_LV_FONT_DEJAVU_20_LATIN_SUP    0
      #define USE_LV_FONT_DEJAVU_20_CYRILLIC     0
      #define USE_LV_FONT_SYMBOL_20              0
      
      #define USE_LV_FONT_DEJAVU_30              0
      #define USE_LV_FONT_DEJAVU_30_LATIN_SUP    0
      #define USE_LV_FONT_DEJAVU_30_CYRILLIC     0
      #define USE_LV_FONT_SYMBOL_30              0
      
      #define USE_LV_FONT_DEJAVU_40              0
      #define USE_LV_FONT_DEJAVU_40_LATIN_SUP    0
      #define USE_LV_FONT_DEJAVU_40_CYRILLIC     0
      #define USE_LV_FONT_SYMBOL_40              0
      
      #define USE_LV_FONT_MONOSPACE_8            1

   5. Update Color Depth to be 1:

      #define LV_COLOR_DEPTH     1                     /*Color depth: 1/8/16/32*/

5. Make the following changes to littlevLegatoComponent/littlevgl/lv_drv_conf.h:
   1. At the top of the file, change the #if 0 to #if 1 to enable the file
   2. Update USE_FBDEV to 1 for using framebuffer device

      #define USE_FBDEV         1