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Merge pull request #5480 from mysterywolf/l475 

[lvgl][l475] use single buffer instead of double buffers
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guo 2022-01-06 19:59:03 +08:00 committed by GitHub
parent 7566c1a24c 195f753cbb
commit 495e209f37
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 4 deletions
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7
bsp/stm32/stm32l475-atk-pandora/applications/lvgl/lv_port_disp.c
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@ -10,8 +10,8 @@
#include <lvgl.h> #include <lvgl.h>
#include <drv_lcd.h> #include <drv_lcd.h>
#define MY_DISP_HOR_RES LCD_W #define MY_DISP_HOR_RES LCD_W
#define DISP_BUFFER_LINES 70 #define DISP_BUFFER_LINES (LCD_H/5)
/*A static or global variable to store the buffers*/ /*A static or global variable to store the buffers*/
static lv_disp_draw_buf_t disp_buf; static lv_disp_draw_buf_t disp_buf;
@ -21,7 +21,6 @@ static lv_disp_drv_t disp_drv;
/*Static or global buffer(s). The second buffer is optional*/ /*Static or global buffer(s). The second buffer is optional*/
static lv_color_t buf_1[MY_DISP_HOR_RES * DISP_BUFFER_LINES]; static lv_color_t buf_1[MY_DISP_HOR_RES * DISP_BUFFER_LINES];
static lv_color_t buf_2[MY_DISP_HOR_RES * DISP_BUFFER_LINES];
/*Flush the content of the internal buffer the specific area on the display /*Flush the content of the internal buffer the specific area on the display
*You can use DMA or any hardware acceleration to do this operation in the background but *You can use DMA or any hardware acceleration to do this operation in the background but
@ -39,7 +38,7 @@ static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_colo
void lv_port_disp_init(void) void lv_port_disp_init(void)
{ {
/*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */ /*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */
lv_disp_draw_buf_init(&disp_buf, buf_1, buf_2, MY_DISP_HOR_RES * DISP_BUFFER_LINES); lv_disp_draw_buf_init(&disp_buf, buf_1, RT_NULL, MY_DISP_HOR_RES * DISP_BUFFER_LINES);
lv_disp_drv_init(&disp_drv); /*Basic initialization*/ lv_disp_drv_init(&disp_drv); /*Basic initialization*/