377 lines
10 KiB
C
377 lines
10 KiB
C
/**
|
|
* @file lv_port_fs_template.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"
|
|
|
|
static const char *TAG = "LVGL_FS";
|
|
/*********************
|
|
* DEFINES
|
|
*********************/
|
|
|
|
/**********************
|
|
* TYPEDEFS
|
|
**********************/
|
|
|
|
/**********************
|
|
* STATIC PROTOTYPES
|
|
**********************/
|
|
static void fs_init(void);
|
|
|
|
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, uint32_t fn_len);
|
|
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)
|
|
{
|
|
/*----------------------------------------------------
|
|
* Initialize your storage device and File System
|
|
* -------------------------------------------------*/
|
|
fs_init();
|
|
|
|
/*---------------------------------------------------
|
|
* Register the file system interface in LVGL
|
|
*--------------------------------------------------*/
|
|
|
|
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);
|
|
}
|
|
|
|
/**********************
|
|
* STATIC FUNCTIONS
|
|
**********************/
|
|
|
|
/*Initialize your Storage device and File system.*/
|
|
static void fs_init(void)
|
|
{
|
|
/*E.g. for FatFS initialize the SD card and FatFS itself*/
|
|
|
|
/*You code here*/
|
|
ESP_LOGI(TAG, "fs_init");
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
|
|
ESP_LOGI(TAG, "fs_open:%s", path);
|
|
|
|
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
|
|
|
|
void *f = NULL;
|
|
|
|
if (mode == LV_FS_MODE_WR)
|
|
{
|
|
/*Open a file for write*/
|
|
// f = ... /*Add your code here*/
|
|
f = fopen(path, "wb");
|
|
}
|
|
else if (mode == LV_FS_MODE_RD)
|
|
{
|
|
/*Open a file for read*/
|
|
// f = ... /*Add your code here*/
|
|
f = fopen(path, "rb");
|
|
}
|
|
else if (mode == (LV_FS_MODE_WR | LV_FS_MODE_RD))
|
|
{
|
|
/*Open a file for read and write*/
|
|
// f = ... /*Add your code here*/
|
|
f = fopen(path, "wb+");
|
|
}
|
|
|
|
if (f == NULL)
|
|
{
|
|
res = LV_FS_RES_NOT_EX;
|
|
ESP_LOGW(TAG, "找不到文件:%s", path);
|
|
}
|
|
else
|
|
{
|
|
res = LV_FS_RES_OK;
|
|
}
|
|
|
|
return f;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
ESP_LOGI(TAG, "fs_close");
|
|
|
|
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
|
|
|
|
int r = fclose(file_p);
|
|
|
|
if (r != 0)
|
|
{
|
|
res = LV_FS_RES_UNKNOWN;
|
|
ESP_LOGE(TAG, "文件关闭失败");
|
|
}
|
|
else
|
|
{
|
|
res = LV_FS_RES_OK;
|
|
}
|
|
|
|
/*Add your code here*/
|
|
|
|
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_NOT_IMP;
|
|
|
|
/*Add your code here*/
|
|
ESP_LOGI(TAG, "fs_read");
|
|
|
|
FILE *f = (FILE *)file_p;
|
|
size_t bytes_read = fread(buf, 1, btr, f);
|
|
*br = (uint32_t)bytes_read;
|
|
|
|
if (*br == btr)
|
|
{
|
|
res = LV_FS_RES_OK;
|
|
}
|
|
else
|
|
{
|
|
|
|
ESP_LOGE(TAG, "文件读取字节数量错误需要读取%lu 已读取%lu", btr, *br);
|
|
res = LV_FS_RES_UNKNOWN;
|
|
}
|
|
|
|
ESP_LOGI(TAG, "文件读取字节数量:读取%lu 已读取%lu", btr, *br);
|
|
|
|
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 btw Bytes To Write
|
|
* @param bw 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_NOT_IMP;
|
|
|
|
/*Add your code here*/
|
|
ESP_LOGI(TAG, "fs_write");
|
|
|
|
FILE *f = (FILE *)file_p;
|
|
size_t bytes_written = fwrite(buf, 1, btw, f);
|
|
*bw = (uint32_t)bytes_written;
|
|
|
|
if (*bw == btw)
|
|
{
|
|
res = LV_FS_RES_OK;
|
|
}
|
|
else
|
|
{
|
|
|
|
ESP_LOGE(TAG, "文件写入字节数量错误需要写入%lu 已写入%lu", btw, *bw);
|
|
res = LV_FS_RES_UNKNOWN;
|
|
}
|
|
|
|
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_NOT_IMP;
|
|
|
|
/*Add your code here*/
|
|
ESP_LOGI(TAG, "fs_seek:pop%lu whence%d",pos,whence);
|
|
|
|
FILE *f = (FILE *)file_p;
|
|
int std_whence;
|
|
switch (whence)
|
|
{
|
|
case LV_FS_SEEK_SET:
|
|
std_whence = SEEK_SET;
|
|
break;
|
|
case LV_FS_SEEK_CUR:
|
|
std_whence = SEEK_CUR;
|
|
break;
|
|
case LV_FS_SEEK_END:
|
|
std_whence = SEEK_END;
|
|
break;
|
|
default:
|
|
// 如果传入的 whence 值不合法
|
|
ESP_LOGE(TAG, "whence 参数错误");
|
|
return LV_FS_RES_INV_PARAM;
|
|
}
|
|
|
|
if (fseek(f, (long)pos, std_whence) != 0)
|
|
{
|
|
// 定位失败，返回错误
|
|
res = LV_FS_RES_UNKNOWN; // 或更具体的错误码
|
|
ESP_LOGE(TAG, "seek定位失败");
|
|
}
|
|
|
|
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 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_NOT_IMP;
|
|
|
|
/*Add your code here*/
|
|
ESP_LOGI(TAG, "fs_tell");
|
|
|
|
FILE *f = (FILE *)file_p;
|
|
long pos = ftell(f);
|
|
if (pos < 0)
|
|
{
|
|
ESP_LOGE(TAG, "tell定位失败");
|
|
return LV_FS_RES_UNKNOWN;
|
|
}
|
|
*pos_p = (uint32_t)pos;
|
|
|
|
return 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)
|
|
{
|
|
ESP_LOGE(TAG, "fs_dir_open:%s", 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
|
|
* @param fn_len length of the 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, uint32_t fn_len)
|
|
{
|
|
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
|
|
|
|
ESP_LOGI(TAG, "fs_dir_read");
|
|
|
|
/*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*/
|
|
ESP_LOGI(TAG, "fs_dir_close");
|
|
|
|
return res;
|
|
}
|
|
|
|
#else /*Enable this file at the top*/
|
|
|
|
/*This dummy typedef exists purely to silence -Wpedantic.*/
|
|
typedef int keep_pedantic_happy;
|
|
#endif
|