【极海APM32F407 Tiny Board】 2.LVGL8.2移植体验
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一、移植准备
将lv_conf_template.h改成lv_conf.h，命令可以随意更改，一个配置文件，同时打开文件，将#if0调整为# if 1，不然编译的回收会出很多错。
接下来删除一下文件，也可以不删除，删除了方便管理
二、移植过程
在之前的基础上添加lvgl的源码，文件比较多，不一一说明，同时这里添加的时候可以进行分类添加，这样就没有这么乱，查找也方便
添加头文件路径：
添加定时器初始化，定时1ms,，添加lvgl头文件
添加LVGL与LCD的接口处理：
/**
* [url=home.php?mod=space&uid=1307177]@File[/url] lv_port_disp_templ.c
*
*/
/*Copy this file as "lv_port_disp.c" and set this value to "1" to enable content*/
#if 1
/*********************
* INCLUDES
*********************/
#include "lv_port_disp_template.h"
#include "../../lvgl.h"
#include "./BSP/LCD/lcd.h"
#include "gui.h"
#include "lv_demo_keypad_encoder.h"
#define MY_DISP_HOR_RES (320)
#define MY_DISP_VER_RES (240)
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void disp_init(void);
static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p);
//static void gpu_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
// const lv_area_t * fill_area, lv_color_t color);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_port_disp_init(void)
{
/*-------------------------
* Initialize your display
* -----------------------*/
disp_init();
/*-----------------------------
* Create a buffer for drawing
*----------------------------*/
/**
* LVGL requires a buffer where it internally draws the widgets.
* Later this buffer will passed to your display driver's `flush_cb` to copy its content to your display.
* The buffer has to be greater than 1 display row
*
* There are 3 buffering configurations:
* 1. Create ONE buffer:
* LVGL will draw the display's content here and writes it to your display
*
* 2. Create TWO buffer:
* LVGL will draw the display's content to a buffer and writes it your display.
* You should use DMA to write the buffer's content to the display.
* It will enable LVGL to draw the next part of the screen to the other buffer while
* the data is being sent form the first buffer. It makes rendering and flushing parallel.
*
* 3. Double buffering
* Set 2 screens sized buffers and set disp_drv.full_refresh = 1.
* This way LVGL will always provide the whole rendered screen in `flush_cb`
* and you only need to change the frame buffer's address.
*/
/* Example for 1) */
static lv_disp_draw_buf_t draw_buf_dsc_1;
static lv_color_t buf_1[MY_DISP_HOR_RES * 10]; /*A buffer for 10 rows*/
lv_disp_draw_buf_init(&draw_buf_dsc_1, buf_1, NULL, MY_DISP_HOR_RES * 10); /*Initialize the display buffer*/
/* Example for 2) */
// static lv_disp_draw_buf_t draw_buf_dsc_2;
// static lv_color_t buf_2_1[MY_DISP_HOR_RES * 10]; /*A buffer for 10 rows*/
// static lv_color_t buf_2_2[MY_DISP_HOR_RES * 10]; /*An other buffer for 10 rows*/
// lv_disp_draw_buf_init(&draw_buf_dsc_2, buf_2_1, buf_2_2, MY_DISP_HOR_RES * 10); /*Initialize the display buffer*/
/* Example for 3) also set disp_drv.full_refresh = 1 below*/
// static lv_disp_draw_buf_t draw_buf_dsc_3;
// static lv_color_t buf_3_1[MY_DISP_HOR_RES * MY_DISP_VER_RES]; /*A screen sized buffer*/
// static lv_color_t buf_3_2[MY_DISP_HOR_RES * MY_DISP_VER_RES]; /*Another screen sized buffer*/
// lv_disp_draw_buf_init(&draw_buf_dsc_3, buf_3_1, buf_3_2, MY_DISP_VER_RES * LV_VER_RES_MAX); /*Initialize the display buffer*/
/*-----------------------------------
* Register the display in LVGL
*----------------------------------*/
static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
lv_disp_drv_init(&disp_drv); /*Basic initialization*/
/*Set up the functions to access to your display*/
/*Set the resolution of the display*/
disp_drv.hor_res = lcddev.width;
disp_drv.ver_res = lcddev.height;
/*Used to copy the buffer's content to the display*/
disp_drv.flush_cb = disp_flush;
/*Set a display buffer*/
disp_drv.draw_buf = &draw_buf_dsc_1;
/*Required for Example 3)*/
//disp_drv.full_refresh = 1
/* Fill a memory array with a color if you have GPU.
* Note that, in lv_conf.h you can enable GPUs that has built-in support in LVGL.
* But if you have a different GPU you can use with this callback.*/
//disp_drv.gpu_fill_cb = gpu_fill;
/*Finally register the driver*/
lv_disp_drv_register(&disp_drv);
}
/**********************
* STATIC FUNCTIONS
**********************/
/*Initialize your display and the required peripherals.*/
static void disp_init(void)
{
/*You code here*/
LCD_Init();
LCD_direction(1);
}
/*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
*'lv_disp_flush_ready()' has to be called when finished.*/
static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
{
/*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/
lcd_color_fill(area->x1,area->y1,area->x2,area->y2,color_p);
// LCD_Fill(area->x1,area->y1,area->x2,area->y2,(uint16_t)color_p);
/*IMPORTANT!!!
*Inform the graphics library that you are ready with the flushing*/
lv_disp_flush_ready(disp_drv);
}
/*OPTIONAL: GPU INTERFACE*/
/*If your MCU has hardware accelerator (GPU) then you can use it to fill a memory with a color*/
//static void gpu_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
// const lv_area_t * fill_area, lv_color_t color)
//{
// /*It's an example code which should be done by your GPU*/
// int32_t x, y;
// dest_buf += dest_width * fill_area->y1; /*Go to the first line*/
//
// for(y = fill_area->y1; y <= fill_area->y2; y++) {
// for(x = fill_area->x1; x <= fill_area->x2; x++) {
// dest_buf[x] = color;
// }
// dest_buf+=dest_width; /*Go to the next line*/
// }
//}
#else /*Enable this file at the top*/
/*This dummy typedef exists purely to silence -Wpedantic.*/
typedef int keep_pedantic_happy;
#endif
修改LCD的颜色填充函数：
void lcd_color_fill(uint16_t sx, uint16_t sy, uint16_t ex, uint16_t ey, lv_color_t *color)
{
uint32_t y=0;
u16 height, width;
width = ex - sx + 1;
height = ey - sy + 1;
LCD_SetWindows(sx,sy,ex,ey);
for(y = 0; y <width*height; y++)
{
Lcd_WriteData_16Bit(color->full);
color++;
}
}
添加测试代码，如下所示：
int main(void)
{
NVIC_ConfigPriorityGroup(NVIC_PRIORITY_GROUP_3);
sys_apm32_clock_init(336, 8, 2, 7);
delay_init(168);
usart_init(115200);
btmr_tmrx_int_init(10-1, 8400-1);
led_init();
lv_init();
lv_port_disp_init();
lv_obj_t *label = lv_label_create(lv_scr_act());
lv_label_set_text(label,"APM32F407 LVGL8.2");
lv_obj_center(label);
#if 0
nes_main();
#endif
while (1)
{
lv_timer_handler();
LED0_TOGGLE();
delay_ms(500);
}
}
三、结果
显示效果如下，有兴趣的可以继续跑一下官方例程，或者自己写一个
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提升卡
变色卡
千斤顶
1/10 
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