mirror of
https://github.com/lvgl/lvgl.git
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141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/**
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* @file lv_port_disp_templ.c
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*
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*/
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/*Copy this file as "lv_port_disp.c" and set this value to "1" to enable content*/
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#if 0
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/*********************
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* INCLUDES
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*********************/
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#include "lv_port_disp_template.h"
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#include <stdbool.h>
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/*********************
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* DEFINES
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*********************/
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#ifndef MY_DISP_HOR_RES
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#warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen width, default value 320 is used for now.
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#define MY_DISP_HOR_RES 320
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#endif
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#ifndef MY_DISP_VER_RES
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#warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen height, default value 240 is used for now.
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#define MY_DISP_VER_RES 240
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#endif
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void disp_init(void);
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static void disp_flush(lv_display_t * disp, const lv_area_t * area, uint8_t * px_map);
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void lv_port_disp_init(void)
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{
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/*-------------------------
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* Initialize your display
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* -----------------------*/
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disp_init();
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/*------------------------------------
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* Create a display and set a flush_cb
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* -----------------------------------*/
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lv_display_t * disp = lv_display_create(MY_DISP_HOR_RES, MY_DISP_VER_RES);
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lv_display_set_flush_cb(disp, disp_flush);
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/* Example 1
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* One buffer for partial rendering*/
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static lv_color_t buf_1_1[MY_DISP_HOR_RES * 10]; /*A buffer for 10 rows*/
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lv_display_set_draw_buffers(disp, buf_1_1, NULL, sizeof(buf_1_1), LV_DISPLAY_RENDER_MODE_PARTIAL);
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/* Example 2
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* Two buffers for partial rendering
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* In flush_cb DMA or similar hardware should be used to update the display in the background.*/
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static lv_color_t buf_2_1[MY_DISP_HOR_RES * 10];
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static lv_color_t buf_2_2[MY_DISP_HOR_RES * 10];
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lv_display_set_draw_buffers(disp, buf_2_1, buf_2_2, sizeof(buf_2_1), LV_DISPLAY_RENDER_MODE_PARTIAL);
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/* Example 3
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* Two buffers screen sized buffer for double buffering.
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* Both LV_DISPLAY_RENDER_MODE_DIRECT and LV_DISPLAY_RENDER_MODE_FULL works, see their comments*/
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static lv_color_t buf_3_1[MY_DISP_HOR_RES * MY_DISP_VER_RES];
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static lv_color_t buf_3_2[MY_DISP_HOR_RES * MY_DISP_VER_RES];
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lv_display_set_draw_buffers(disp, buf_3_1, buf_3_2, sizeof(buf_3_1), LV_DISPLAY_RENDER_MODE_DIRECT);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/*Initialize your display and the required peripherals.*/
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static void disp_init(void)
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{
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/*You code here*/
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}
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volatile bool disp_flush_enabled = true;
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/* Enable updating the screen (the flushing process) when disp_flush() is called by LVGL
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*/
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void disp_enable_update(void)
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{
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disp_flush_enabled = true;
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}
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/* Disable updating the screen (the flushing process) when disp_flush() is called by LVGL
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*/
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void disp_disable_update(void)
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{
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disp_flush_enabled = false;
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}
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/*Flush the content of the internal buffer the specific area on the display.
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*`px_map` contains the rendered image as raw pixel map and it should be copied to `area` on the display.
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*You can use DMA or any hardware acceleration to do this operation in the background but
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*'lv_display_flush_ready()' has to be called when it's finished.*/
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static void disp_flush(lv_display_t * disp_drv, const lv_area_t * area, uint8_t * px_map)
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{
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if(disp_flush_enabled) {
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/*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/
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int32_t x;
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int32_t y;
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for(y = area->y1; y <= area->y2; y++) {
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for(x = area->x1; x <= area->x2; x++) {
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/*Put a pixel to the display. For example:*/
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/*put_px(x, y, *px_map)*/
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px_map++;
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}
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}
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}
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/*IMPORTANT!!!
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*Inform the graphics library that you are ready with the flushing*/
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lv_display_flush_ready(disp_drv);
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}
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#else /*Enable this file at the top*/
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/*This dummy typedef exists purely to silence -Wpedantic.*/
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typedef int keep_pedantic_happy;
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#endif
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