个人学习笔记，不保证正确
win10
keil5
正点原子w601开发板
pkgs --update
scons --target=mdk5
1.lvgl官方提供了参考移植文档
2.lv_port_fs.h
#ifndef LV_PORT_FS_H
#define LV_PORT_FS_H
#ifdef __cplusplus
extern "C" {
#endif
#include "lvgl.h"
void lv_port_fs_init(void);
#ifdef __cplusplus
} /*extern "C"*/
#endif
#endif /*LV_PORT_FS_TEMPL_H*/
3.lv_port_fs.c
/**
* @file lv_port_fs_templ.c
*
*/
/*Copy this file as "lv_port_fs.c" and set this value to "1" to enable content*/
#if 1
/*********************
* INCLUDES
*********************/
#include "lv_port_fs.h"
#include "lvgl.h"
#include <dfs_posix.h>
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode);
static lv_fs_res_t fs_close(lv_fs_drv_t *drv, void *file_p);
static lv_fs_res_t fs_read(lv_fs_drv_t *drv, void *file_p, void *buf, uint32_t btr, uint32_t *br);
static lv_fs_res_t fs_write(lv_fs_drv_t *drv, void *file_p, const void *buf, uint32_t btw, uint32_t *bw);
static lv_fs_res_t fs_seek(lv_fs_drv_t *drv, void *file_p, uint32_t pos, lv_fs_whence_t whence);
//static lv_fs_res_t fs_size(lv_fs_drv_t *drv, void *file_p, uint32_t *size_p);
static lv_fs_res_t fs_tell(lv_fs_drv_t *drv, void *file_p, uint32_t *pos_p);
static void *fs_dir_open(lv_fs_drv_t *drv, const char *path);
static lv_fs_res_t fs_dir_read(lv_fs_drv_t *drv, void *rddir_p, char *fn);
static lv_fs_res_t fs_dir_close(lv_fs_drv_t *drv, void *rddir_p);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* GLOBAL PROTOTYPES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_port_fs_init(void)
{
/*Add a simple drive to open images*/
static lv_fs_drv_t fs_drv;
lv_fs_drv_init(&fs_drv);
/*Set up fields...*/
fs_drv.letter = 'S';
fs_drv.open_cb = fs_open;
fs_drv.close_cb = fs_close;
fs_drv.read_cb = fs_read;
fs_drv.write_cb = fs_write;
fs_drv.seek_cb = fs_seek;
fs_drv.tell_cb = fs_tell;
fs_drv.dir_close_cb = fs_dir_close;
fs_drv.dir_open_cb = fs_dir_open;
fs_drv.dir_read_cb = fs_dir_read;
lv_fs_drv_register(&fs_drv);
}
/**
* Open a file
* @param drv pointer to a driver where this function belongs
* @param path path to the file beginning with the driver letter (e.g. S:/folder/file.txt)
* @param mode read: FS_MODE_RD, write: FS_MODE_WR, both: FS_MODE_RD | FS_MODE_WR
* @return a file descriptor or NULL on error
*/
static void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode)
{
int fp;
int flag;
switch (mode)
{
case LV_FS_MODE_WR:
flag = O_WRONLY | O_CREAT;
break;
case LV_FS_MODE_RD:
flag = O_WRONLY | O_CREAT;
break;
case LV_FS_MODE_RD | LV_FS_MODE_WR:
flag = O_RDWR | O_CREAT;
break;
default:
return NULL;
break;
}
fp = open(path, flag);
if (fp < 0)
{
return NULL;
}
else
{
return (void *)fp;
}
}
/**
* Close an opened file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable. (opened with fs_open)
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_close(lv_fs_drv_t *drv, void *file_p)
{
lv_fs_res_t res = LV_FS_RES_FS_ERR;
if (close((int)file_p) == 0)
{
res = LV_FS_RES_OK;
}
return res;
}
/**
* Read data from an opened file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable.
* @param buf pointer to a memory block where to store the read data
* @param btr number of Bytes To Read
* @param br the real number of read bytes (Byte Read)
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_read(lv_fs_drv_t *drv, void *file_p, void *buf, uint32_t btr, uint32_t *br)
{
lv_fs_res_t res = LV_FS_RES_FS_ERR;
int ret = read((int)file_p, buf, btr);
if (ret >= 0)
{
*br = ret;
res = LV_FS_RES_OK;
}
return res;
}
/**
* Write into a file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable
* @param buf pointer to a buffer with the bytes to write
* @param btr Bytes To Write
* @param br the number of real written bytes (Bytes Written). NULL if unused.
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_write(lv_fs_drv_t *drv, void *file_p, const void *buf, uint32_t btw, uint32_t *bw)
{
lv_fs_res_t res = LV_FS_RES_FS_ERR;
int ret = read((int)file_p, (void *)buf, btw);
if (ret >= 0)
{
*bw = ret;
res = LV_FS_RES_OK;
}
return res;
}
/**
* Set the read write pointer. Also expand the file size if necessary.
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable. (opened with fs_open )
* @param pos the new position of read write pointer
* @param whence tells from where to interpret the `pos`. See @lv_fs_whence_t
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_seek(lv_fs_drv_t *drv, void *file_p, uint32_t pos, lv_fs_whence_t whence)
{
lv_fs_res_t res = LV_FS_RES_UNKNOWN;
int fd = (int)file_p;
if (lseek(fd, pos, SEEK_SET) >= 0)
res = LV_FS_RES_OK;
return res;
}
/**
* Give the position of the read write pointer
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable.
* @param pos_p pointer to to store the result
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_tell(lv_fs_drv_t *drv, void *file_p, uint32_t *pos_p)
{
lv_fs_res_t res = LV_FS_RES_UNKNOWN;
int fd = (int)file_p;
off_t pos = lseek(fd, 0, SEEK_CUR);
if (pos >= 0)
{
*pos_p = pos;
res = LV_FS_RES_OK;
}
return res;
}
/**
* Initialize a 'lv_fs_dir_t' variable for directory reading
* @param drv pointer to a driver where this function belongs
* @param path path to a directory
* @return pointer to the directory read descriptor or NULL on error
*/
static void *fs_dir_open(lv_fs_drv_t *drv, const char *path)
{
void *dir = NULL;
/*Add your code here*/
// dir = ... /*Add your code here*/
return dir;
}
/**
* Read the next filename form a directory.
* The name of the directories will begin with '/'
* @param drv pointer to a driver where this function belongs
* @param rddir_p pointer to an initialized 'lv_fs_dir_t' variable
* @param fn pointer to a buffer to store the filename
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_read(lv_fs_drv_t *drv, void *rddir_p, char *fn)
{
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
/*Add your code here*/
return res;
}
/**
* Close the directory reading
* @param drv pointer to a driver where this function belongs
* @param rddir_p pointer to an initialized 'lv_fs_dir_t' variable
* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_close(lv_fs_drv_t *drv, void *rddir_p)
{
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
/*Add your code here*/
return res;
}
#else /*Enable this file at the top*/
/*This dummy typedef exists purely to silence -Wpedantic.*/
typedef int keep_pedantic_happy;
#endif
4.main.c
/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-05-07 yangjie first implementation
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <drv_lcd.h>
#include <rttlogo.h>
#include <dfs_fs.h>
#define DBG_TAG "MIAN"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
static rt_thread_t lvgl_tid = RT_NULL;
static rt_timer_t lvgl_timer = RT_NULL;
#include "lv_port_disp.h"
#include "lv_obj.h"
#include "lv_port_fs.h"
void demo(void)
{
lv_obj_t *label1 = lv_label_create(lv_scr_act());
lv_label_set_long_mode(label1, LV_LABEL_LONG_WRAP); /*Break the long lines*/
lv_label_set_recolor(label1, true); /*Enable re-coloring by commands in the text*/
lv_label_set_text(label1, "#0000ff Re-color# #ff00ff words# #ff0000 of a# label, align the lines to the center "
"and wrap long text automatically.");
lv_obj_set_width(label1, 150); /*Set smaller width to make the lines wrap*/
lv_obj_set_style_text_align(label1, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_align(label1, LV_ALIGN_CENTER, 0, -40);
lv_obj_t *label2 = lv_label_create(lv_scr_act());
lv_label_set_long_mode(label2, LV_LABEL_LONG_SCROLL_CIRCULAR); /*Circular scroll*/
lv_obj_set_width(label2, 150);
lv_label_set_text(label2, "It is a circularly scrolling text. ");
lv_obj_align(label2, LV_ALIGN_CENTER, 0, 40);
}
MSH_CMD_EXPORT(demo, demo);
void demo_fs(int argc,char *argv[])
{
char temp_buf[50];
if(argc==1)
{
rt_kprintf("sys para error");
return ;
}
rt_sprintf(temp_buf,"S:/weather/%s.bin",argv[1]);
rt_kprintf("file path %s",temp_buf);
lv_obj_t * icon = lv_img_create(lv_scr_act());
lv_img_set_src(icon, temp_buf);
lv_obj_align(icon, LV_ALIGN_CENTER, 0, 0);
}
MSH_CMD_EXPORT(demo_fs, demo_fs);
static void lvgl_thread_entry(void *parameter)
{
lv_init();
lv_port_disp_init();
lv_port_fs_init();
//demo();
while (1)
{
lv_task_handler();
rt_thread_mdelay(5); /* 官方手册是提议至少 5 ms */
}
}
static void lvgl_timeout(void *parameter)
{
lv_tick_inc(10); /* 因为一个时钟是 10ms */
}
int main(void)
{
lcd_clear(WHITE);
lvgl_tid = rt_thread_create("lvgl",
lvgl_thread_entry,
RT_NULL,
4096, /* stack size */
12, /* priority */
5); /* time slice */
if (lvgl_tid != RT_NULL)
rt_thread_startup(lvgl_tid);
lvgl_timer = rt_timer_create("lvgl_timer",
lvgl_timeout,
RT_NULL,
1, /* 超时时间，单位是时钟节拍 */
RT_TIMER_FLAG_PERIODIC);
if (lvgl_timer != RT_NULL)
rt_timer_start(lvgl_timer);
if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
{
LOG_I("Filesystem initialized!");
}
else
{
LOG_E("Failed to initialize filesystem!");
}
return 0;
}
