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examples/lvgldemo: Add configuration for double buffering support

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This commit is contained in:
Gustavo Henrique Nihei 2021-04-05 10:03:18 -03:00 committed by Alan Carvalho de Assis
parent 2d0a174cec
commit cbce79ddb3
2 changed files with 21 additions and 9 deletions
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12
examples/lvgldemo/Kconfig
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@ -22,6 +22,18 @@ config EXAMPLES_LVGLDEMO_BUFF_SIZE
int "Display buffer size (in line)"
default 20
config EXAMPLES_LVGLDEMO_DOUBLE_BUFFERING
bool "Enable double buffering"
default n
---help---
When double buffering is enabled, LVGL expects the size of both
buffers as:
CONFIG_LV_HOR_RES * CONFIG_EXAMPLES_LVGLDEMO_BUFF_SIZE.
True double buffering support is enabled if both buffers have the
same dimensions as the display device resolution. Otherwise,
LVGL will perform a number of partial refreshes according to the
defined buffer size.
config EXAMPLES_LVGLDEMO_ASYNC_FLUSH
bool "Flush the display buffer asynchronously"
default n

18
examples/lvgldemo/lvgldemo.c
View File

@ -41,8 +41,8 @@
#include <sys/boardctl.h>
#include <unistd.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <debug.h>
@ -52,10 +52,8 @@
#include "lcddev.h"
#ifdef CONFIG_INPUT
#include "tp.h"
#include "tp_cal.h"
#endif
/****************************************************************************
@ -112,7 +110,13 @@ static void monitor_cb(lv_disp_drv_t * disp_drv, uint32_t time, uint32_t px)
* Private Data
****************************************************************************/
static lv_color_t buf[DISPLAY_BUFFER_SIZE];
static lv_color_t buffer1[DISPLAY_BUFFER_SIZE];
#ifdef CONFIG_EXAMPLES_LVGLDEMO_DOUBLE_BUFFERING
static lv_color_t buffer2[DISPLAY_BUFFER_SIZE];
#else
# define buffer2 NULL
#endif
/****************************************************************************
* Public Functions
@ -178,7 +182,7 @@ int main(int argc, FAR char *argv[])
/* Basic LVGL display driver initialization */
lv_disp_buf_init(&disp_buf, buf, NULL, DISPLAY_BUFFER_SIZE);
lv_disp_buf_init(&disp_buf, buffer1, buffer2, DISPLAY_BUFFER_SIZE);
lv_disp_drv_init(&disp_drv);
disp_drv.buffer = &disp_buf;
disp_drv.monitor_cb = monitor_cb;
@ -200,7 +204,6 @@ int main(int argc, FAR char *argv[])
lv_disp_drv_register(&disp_drv);
#ifdef CONFIG_INPUT
/* Touchpad Initialization */
tp_init();
@ -214,7 +217,6 @@ int main(int argc, FAR char *argv[])
indev_drv.read_cb = tp_read;
lv_indev_drv_register(&indev_drv);
#endif
#if defined(CONFIG_EXAMPLES_LVGLDEMO_BENCHMARK)
@ -228,7 +230,6 @@ int main(int argc, FAR char *argv[])
#endif
#ifdef CONFIG_INPUT
/* Start TP calibration */
#ifdef CONFIG_EXAMPLES_LVGLDEMO_CALIBRATE
@ -236,7 +237,6 @@ int main(int argc, FAR char *argv[])
#else
tp_set_cal_values(p, p + 1, p + 2, p + 3);
#endif
#endif
/* Handle LVGL tasks */