【AT32A403A 车规MCU开发板】 移植LVGL
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这篇来学习下在AT32A403A开发板上移植LVGL。
一、下载LVGL
1.1、源码地址
下载地址：
二、添加文件
2.1、在项目中添加源文件，将LVGL相应目录下的文件添加到项目。
2.2、lv_port_disp_templ.c
/**
* [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 <stdbool.h>
#include "main.h"
/*********************
* DEFINES
*********************/
#ifndef MY_DISP_HOR_RES
//#warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen width, default value 320 is used for now.
#define MY_DISP_HOR_RES 240
#endif
#ifndef MY_DISP_VER_RES
//#warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen height, default value 240 is used for now.
#define MY_DISP_VER_RES 320
#endif
/**********************
* 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
**********************/
static lv_disp_drv_t* lv_disp_drv_p = NULL;
void DMA1_Channel3_IRQHandler()
{
dma_flag_clear(DMA1_FDT3_FLAG);
dma_channel_enable(DMA1_CHANNEL3, FALSE);
if(lv_disp_drv_p != NULL)
{
lv_disp_flush_ready(lv_disp_drv_p); /* tell lvgl that flushing is done */
}
}
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*/
static lv_disp_draw_buf_t draw_buf_dsc_2 ; /*An other buffer for 10 rows*/
static lv_color_t buf_2_1[MY_DISP_HOR_RES * 20]; /*A buffer for 10 rows*/
static lv_color_t buf_2_2[MY_DISP_HOR_RES * 20]; /*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 * 20); /*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 = MY_DISP_HOR_RES;
disp_drv.ver_res = MY_DISP_VER_RES;
/*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_2;
/*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*/
init_lcd();
dma_init_type dma_init_struct;
crm_periph_clock_enable(CRM_DMA1_PERIPH_CLOCK, TRUE);
dma_reset(LCD_SPI_MASTER_Tx_DMA_Channel);
dma_init_struct.buffer_size = 0xFFFE;
dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL;
dma_init_struct.memory_base_addr = (uint32_t)LCD_SPI_MASTER_DR_Base;
dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_BYTE;
dma_init_struct.memory_inc_enable = TRUE;
dma_init_struct.peripheral_base_addr = (uint32_t)LCD_SPI_MASTER_DR_Base;
dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_BYTE;
dma_init_struct.peripheral_inc_enable = FALSE;
dma_init_struct.priority = DMA_PRIORITY_HIGH;
dma_init_struct.loop_mode_enable = FALSE;
dma_init(LCD_SPI_MASTER_Tx_DMA_Channel, &dma_init_struct);
nvic_irq_enable(LCD_SPI_MASTER_Tx_DMA_IRQn, 1, 0);
dma_interrupt_enable(LCD_SPI_MASTER_Tx_DMA_Channel,DMA_FDT_INT,TRUE);
}
volatile bool disp_flush_enabled = true;
/* Enable updating the screen (the flushing process) when disp_flush() is called by LVGL
*/
void disp_enable_update(void)
{
disp_flush_enabled = true;
}
/* Disable updating the screen (the flushing process) when disp_flush() is called by LVGL
*/
void disp_disable_update(void)
{
disp_flush_enabled = false;
}
/*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)
{
// if(disp_flush_enabled) {
// /*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/
// int32_t x;
// int32_t y;
// for(y = area->y1; y <= area->y2; y++) {
// for(x = area->x1; x <= area->x2; x++) {
// /*Put a pixel to the display. For example:*/
// /*put_px(x, y, *color_p)*/
// color_p++;
// }
// }
// }
/*IMPORTANT!!!
*Inform the graphics library that you are ready with the flushing*/
// lcd_draw_fast_rgb_color(area->x1,area->y1,area->x2,area->y2,(uint16_t*)color_p);
// lv_disp_flush_ready(disp_drv);
lv_disp_drv_p = disp_drv;
u32 size = (area->x2 - area->x1+1)*(area->y2 - area->y1+1) ;
LCD_SetWindows(area->x1,area->y1,area->x2,area->y2);
//LCD_DC_SET;
LCD_CS_CLR;
LCD_SPI_MASTER_Tx_DMA_Channel->ctrl &= ~(uint16_t)1;
LCD_SPI_MASTER_Tx_DMA_Channel->maddr = (uint32_t)color_p;
LCD_SPI_MASTER_Tx_DMA_Channel->dtcnt = size*2;
LCD_SPI_MASTER_Tx_DMA_Channel->ctrl |= (uint16_t)1;
//LCD_CS_SET;
}
/*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
2.3、lv_port_indev_templ.c
/**
* @file lv_port_indev_templ.c
*
*/
/*Copy this file as "lv_port_indev.c" and set this value to "1" to enable content*/
#if 1
/*********************
* INCLUDES
*********************/
#include "lv_port_indev_template.h"
#include "../../lvgl.h"
#include "main.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void touchpad_init(void);
static void touchpad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
static bool touchpad_is_pressed(void);
static void touchpad_get_xy(lv_coord_t * x, lv_coord_t * y);
static void mouse_init(void);
static void mouse_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
static bool mouse_is_pressed(void);
static void mouse_get_xy(lv_coord_t * x, lv_coord_t * y);
static void keypad_init(void);
static void keypad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
static uint32_t keypad_get_key(void);
static void encoder_init(void);
static void encoder_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
static void encoder_handler(void);
//static void button_init(void);
static void button_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
static int8_t button_get_pressed_id(void);
static bool button_is_pressed(uint8_t id);
/**********************
* STATIC VARIABLES
**********************/
lv_indev_t * indev_touchpad;
lv_indev_t * indev_mouse;
lv_indev_t * indev_keypad;
lv_indev_t * indev_encoder;
lv_indev_t * indev_button;
static int32_t encoder_diff;
static lv_indev_state_t encoder_state;
extern struct tp_pix_ tp_pixad, tp_pixlcd;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_port_indev_init(void)
{
/**
* Here you will find example implementation of input devices supported by LittelvGL:
* - Touchpad
* - Mouse (with cursor support)
* - Keypad (supports GUI usage only with key)
* - Encoder (supports GUI usage only with: left, right, push)
* - Button (external buttons to press points on the screen)
*
* The `..._read()` function are only examples.
* You should shape them according to your hardware
*/
static lv_indev_drv_t indev_drv;
/*------------------
* Touchpad
* -----------------*/
/*Initialize your touchpad if you have*/
touchpad_init();
/*Register a touchpad input device*/
lv_indev_drv_init(&indev_drv);
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = touchpad_read;
indev_touchpad = lv_indev_drv_register(&indev_drv);
// /*------------------
// * Mouse
// * -----------------*/
// /*Initialize your mouse if you have*/
// mouse_init();
// /*Register a mouse input device*/
// lv_indev_drv_init(&indev_drv);
// indev_drv.type = LV_INDEV_TYPE_POINTER;
// indev_drv.read_cb = mouse_read;
// indev_mouse = lv_indev_drv_register(&indev_drv);
// /*Set cursor. For simplicity set a HOME symbol now.*/
// lv_obj_t * mouse_cursor = lv_img_create(lv_scr_act());
// lv_img_set_src(mouse_cursor, LV_SYMBOL_HOME);
// lv_indev_set_cursor(indev_mouse, mouse_cursor);
// /*------------------
// * Keypad
// * -----------------*/
// /*Initialize your keypad or keyboard if you have*/
// keypad_init();
// /*Register a keypad input device*/
// lv_indev_drv_init(&indev_drv);
// indev_drv.type = LV_INDEV_TYPE_KEYPAD;
// indev_drv.read_cb = keypad_read;
// indev_keypad = lv_indev_drv_register(&indev_drv);
// /*Later you should create group(s) with `lv_group_t * group = lv_group_create()`,
// *add objects to the group with `lv_group_add_obj(group, obj)`
// *and assign this input device to group to navigate in it:
// *`lv_indev_set_group(indev_keypad, group);`*/
// /*------------------
// * Encoder
// * -----------------*/
// /*Initialize your encoder if you have*/
// encoder_init();
// /*Register a encoder input device*/
// lv_indev_drv_init(&indev_drv);
// indev_drv.type = LV_INDEV_TYPE_ENCODER;
// indev_drv.read_cb = encoder_read;
// indev_encoder = lv_indev_drv_register(&indev_drv);
// /*Later you should create group(s) with `lv_group_t * group = lv_group_create()`,
// *add objects to the group with `lv_group_add_obj(group, obj)`
// *and assign this input device to group to navigate in it:
// *`lv_indev_set_group(indev_encoder, group);`*/
// /*------------------
// * Button
// * -----------------*/
// /*Initialize your button if you have*/
// button_init();
// /*Register a button input device*/
// lv_indev_drv_init(&indev_drv);
// indev_drv.type = LV_INDEV_TYPE_BUTTON;
// indev_drv.read_cb = button_read;
// indev_button = lv_indev_drv_register(&indev_drv);
// /*Assign buttons to points on the screen*/
// static const lv_point_t btn_points[2] = {
// {10, 10}, /*Button 0 -> x:10; y:10*/
// {40, 100}, /*Button 1 -> x:40; y:100*/
// };
// lv_indev_set_button_points(indev_button, btn_points);
}
/**********************
* STATIC FUNCTIONS
**********************/
/*------------------
* Touchpad
* -----------------*/
/*Initialize your touchpad*/
static void touchpad_init(void)
{
/*Your code comes here*/
}
/*Will be called by the library to read the touchpad*/
static void touchpad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
static lv_coord_t last_x = 0;
static lv_coord_t last_y = 0;
if(PEN_CHECK == 0)
{
if(coor_convert())
{
data->point.x =tp_pixlcd.x;
data->point.y =tp_pixlcd.y;
data->state = LV_INDEV_STATE_PR;
last_x = data->point.x;
last_y = data->point.y;
}
else
{
data->point.x = last_x;
data->point.y = last_y;
data->state = LV_INDEV_STATE_REL;
}
}
// /*Save the pressed coordinates and the state*/
// if(touchpad_is_pressed()) {
// touchpad_get_xy(&last_x, &last_y);
// data->state = LV_INDEV_STATE_PR;
// }
// else {
// data->state = LV_INDEV_STATE_REL;
// }
// /*Set the last pressed coordinates*/
// data->point.x = last_x;
// data->point.y = last_y;
}
/*Return true is the touchpad is pressed*/
static bool touchpad_is_pressed(void)
{
/*Your code comes here*/
return false;
}
/*Get the x and y coordinates if the touchpad is pressed*/
static void touchpad_get_xy(lv_coord_t * x, lv_coord_t * y)
{
/*Your code comes here*/
(*x) = 0;
(*y) = 0;
}
/*------------------
* Mouse
* -----------------*/
/*Initialize your mouse*/
static void mouse_init(void)
{
/*Your code comes here*/
}
/*Will be called by the library to read the mouse*/
static void mouse_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
/*Get the current x and y coordinates*/
mouse_get_xy(&data->point.x, &data->point.y);
/*Get whether the mouse button is pressed or released*/
if(mouse_is_pressed()) {
data->state = LV_INDEV_STATE_PR;
}
else {
data->state = LV_INDEV_STATE_REL;
}
}
/*Return true is the mouse button is pressed*/
static bool mouse_is_pressed(void)
{
/*Your code comes here*/
return false;
}
/*Get the x and y coordinates if the mouse is pressed*/
static void mouse_get_xy(lv_coord_t * x, lv_coord_t * y)
{
/*Your code comes here*/
(*x) = 0;
(*y) = 0;
}
/*------------------
* Keypad
* -----------------*/
/*Initialize your keypad*/
static void keypad_init(void)
{
/*Your code comes here*/
}
/*Will be called by the library to read the mouse*/
static void keypad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
static uint32_t last_key = 0;
/*Get the current x and y coordinates*/
mouse_get_xy(&data->point.x, &data->point.y);
/*Get whether the a key is pressed and save the pressed key*/
uint32_t act_key = keypad_get_key();
if(act_key != 0) {
data->state = LV_INDEV_STATE_PR;
/*Translate the keys to LVGL control characters according to your key definitions*/
switch(act_key) {
case 1:
act_key = LV_KEY_NEXT;
break;
case 2:
act_key = LV_KEY_PREV;
break;
case 3:
act_key = LV_KEY_LEFT;
break;
case 4:
act_key = LV_KEY_RIGHT;
break;
case 5:
act_key = LV_KEY_ENTER;
break;
}
last_key = act_key;
}
else {
data->state = LV_INDEV_STATE_REL;
}
data->key = last_key;
}
/*Get the currently being pressed key. 0 if no key is pressed*/
static uint32_t keypad_get_key(void)
{
/*Your code comes here*/
return 0;
}
/*------------------
* Encoder
* -----------------*/
/*Initialize your keypad*/
static void encoder_init(void)
{
/*Your code comes here*/
}
/*Will be called by the library to read the encoder*/
static void encoder_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
data->enc_diff = encoder_diff;
data->state = encoder_state;
}
/*Call this function in an interrupt to process encoder events (turn, press)*/
static void encoder_handler(void)
{
/*Your code comes here*/
encoder_diff += 0;
encoder_state = LV_INDEV_STATE_REL;
}
/*------------------
* Button
* -----------------*/
/*Initialize your buttons*/
//static void button_init(void)
//{
// /*Your code comes here*/
//}
/*Will be called by the library to read the button*/
static void button_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
static uint8_t last_btn = 0;
/*Get the pressed button's ID*/
int8_t btn_act = button_get_pressed_id();
if(btn_act >= 0) {
data->state = LV_INDEV_STATE_PR;
last_btn = btn_act;
}
else {
data->state = LV_INDEV_STATE_REL;
}
/*Save the last pressed button's ID*/
data->btn_id = last_btn;
}
/*Get ID (0, 1, 2 ..) of the pressed button*/
static int8_t button_get_pressed_id(void)
{
uint8_t i;
/*Check to buttons see which is being pressed (assume there are 2 buttons)*/
for(i = 0; i < 2; i++) {
/*Return the pressed button's ID*/
if(button_is_pressed(i)) {
return i;
}
}
/*No button pressed*/
return -1;
}
/*Test if `id` button is pressed or not*/
static bool button_is_pressed(uint8_t id)
{
/*Your code comes here*/
return false;
}
#else /*Enable this file at the top*/
/*This dummy typedef exists purely to silence -Wpedantic.*/
typedef int keep_pedantic_happy;
#endif
2.4、main.c
#include "main.h"
lv_ui guider_ui;
void nvic_configuration(void)
{
/* 2 bit for pre-emption priority,2 bits for subpriority */
nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);
/* configure dma1 channel3 for the spi transmit */
nvic_irq_enable(LCD_SPI_MASTER_Tx_DMA_IRQn, 0, 2);
}
int main(void)
{
uint8_t spi1_tx_buf[10];
system_clock_config();
nvic_configuration();
delay_init();
SysTick_Init();
init_usart(115200);
init_led();
printf("test\r\n");
init_lcd();
LCD_Clear(RED);
touch_adjust();
lv_init();
lv_port_disp_init();
lv_port_indev_init();
lv_demo_widgets();
while(1)
{
lv_task_handler();
delay_ms(5);
}
}
三、运行视频
下载程序后，复位开发板，运行如下
lvgl
|
提升卡
变色卡
千斤顶
1/9 
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