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Merge pull request #30 from lvgl/fix/display_buffer_size

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Enable using custom display buffer size, closes #27
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Carlos Diaz 2021-02-09 09:59:18 -06:00 committed by GitHub
parent 9cd4a2d4c8 82336c2120
commit 19a943c015
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 29 additions and 1 deletions
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18
lvgl_helpers.h
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@ -21,6 +21,21 @@ extern "C" {
/*********************
* DEFINES
*********************/
/* DISP_BUF_SIZE value doesn't have an special meaning, but it's the size
* of the buffer(s) passed to LVGL as display buffers. The default values used
* were the values working for the contributor of the display controller.
*
* As LVGL supports partial display updates the DISP_BUF_SIZE doesn't
* necessarily need to be equal to the display size.
*
* When using RGB displays the display buffer size will also depends on the
* color format being used, for RGB565 each pixel needs 2 bytes.
* When using the mono theme, the display pixels can be represented in one bit,
* so the buffer size can be divided by 8, e.g. see SSD1306 display size. */
#if defined (CONFIG_CUSTOM_DISPLAY_BUFFER_SIZE)
#define DISP_BUF_SIZE CONFIG_CUSTOM_DISPLAY_BUFFER_BYTES
#else
#if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)
#define DISP_BUF_SIZE (LV_HOR_RES_MAX * 40)
#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S
@ -38,7 +53,7 @@ extern "C" {
#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488
#define DISP_BUF_SIZE (LV_HOR_RES_MAX * 40)
#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341
#define DISP_BUF_SIZE (LV_HOR_RES_MAX * 64)
#define DISP_BUF_SIZE (LV_HOR_RES_MAX * 40)
#elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306
#define DISP_BUF_SIZE (LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8))
#elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
@ -57,6 +72,7 @@ extern "C" {
#else
#error "No display controller selected"
#endif
#endif
/**********************
* TYPEDEFS

12
lvgl_tft/Kconfig
View file

@ -328,6 +328,18 @@ menu "LVGL TFT Display controller"
select LV_TFT_DISPLAY_PROTOCOL_SPI
endchoice
config CUSTOM_DISPLAY_BUFFER_SIZE
bool "Use custom display buffer size (bytes)"
help
Enable to use a custom display buffer size.
config CUSTOM_DISPLAY_BUFFER_BYTES
int "Custom buffer size (bytes)"
depends on CUSTOM_DISPLAY_BUFFER_SIZE
default 1024
help
See Display buffer on LVGL docs for more information.
# Select one of the available FT81x configurations.
choice
prompt "Select a FT81x configuration." if LV_TFT_DISPLAY_USER_CONTROLLER_FT81X