I don’t understand the question… probably a translation issue.
i don’t understant, why cf < CF_BUILT_IN_FIRST ?
lv_img_cf_t cf = ((lv_img_dsc_t *)src)->header.cf;
if(cf < CF_BUILT_IN_FIRST || cf > CF_BUILT_IN_LAST) return LV_RES_INV;
the format LV_IMG_CF_TRUE_COLOR can’t be use in .bin file ?
and when i open a convert file the 4 first byte is
typedef struct
{
/* The first 8 bit is very important to distinguish the different source types.
* For more info see `lv_img_get_src_type()` in lv_img.c */
uint32_t cf : 5; /* Color format: See `lv_img_color_format_t`*/
uint32_t always_zero : 3; /*It the upper bits of the first byte. Always zero to look like a
non-printable character*/
uint32_t reserved : 2; /*Reserved to be used later*/
uint32_t w : 11; /*Width of the image map*/
uint32_t h : 11; /*Height of the image map*/
} lv_img_header_t;
04 00 05 1e // in HEXA and mean :
0000 0 // cf
100 // always_zero
00 // reserved
00000000000 // w
10100011110 // h
That why i ask in which way i must read the header ?
The color formats are represented as numbers. That if statement just checks whether it’s a valid color format or not.
It looks like you must be reading the image header wrong. The always_zero bits are not all zero and the image is zero pixels wide. 
ok the library lv_fs_fatfs.c work great
not for the dir drv but it work !!! finally 
the SD.H and FS.h use by ESP32 on arduino DON’T WORK ! i think is because the read function need a Uint8_t buffer.
size_t read(uint8_t* buf, size_t size);
so don’t weast your time like a do and use the fatfs if you want use image one just : remove the dir function and pretype void* file_p and all work.
don’t forget to initialise your SD card with :
/* Initialisation de la carte SD */
Serial.print(F("Init SD card... "));
if (!SD.begin(SD_CS)) {
Serial.println(F("FAIL"));
for (;;); // appui sur bouton RESET
}
before init the drive
thanx for you’re time.
**
* Open a file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable
* @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 LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_open (lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode)
{
uint8_t flags = 0;
if(mode == LV_FS_MODE_WR) flags = FA_WRITE | FA_OPEN_ALWAYS;
else if(mode == LV_FS_MODE_RD) flags = FA_READ;
else if(mode == (LV_FS_MODE_WR | LV_FS_MODE_RD)) flags = FA_READ | FA_WRITE | FA_OPEN_ALWAYS;
FRESULT res = f_open((FIL*) file_p, path, flags);
if(res == FR_OK) {
f_lseek((FIL*) file_p, 0);
return LV_FS_RES_OK;
} else {
return LV_FS_RES_UNKNOWN;
}
}
/**
* 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 lv_ufs_open)
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_close (lv_fs_drv_t * drv, void * file_p)
{
f_close((FIL*) file_p);
return LV_FS_RES_OK;
}
/**
* 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, the file is read
* 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)
{
FRESULT res = f_read((FIL*) file_p, buf, btr, (UINT*)br);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* 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 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)
{
FRESULT res = f_write((FIL*) file_p, buf, btw, (UINT*)bw);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* 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 lv_ufs_open )
* @param pos the new position of read write pointer
* @return LV_FS_RES_OK: no error, the file is read
* 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)
{
f_lseek((FIL*) file_p, pos);
return LV_FS_RES_OK;
}
/**
* Give the size of a file bytes
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable
* @param size pointer to a variable to store the size
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_size (lv_fs_drv_t * drv, void * file_p, uint32_t * size_p)
{
(*size_p) = f_size(((file_t *)file_p));
return LV_FS_RES_OK;
}
/**
* 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, the file is read
* 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)
{
*pos_p = f_tell(((file_t *)file_p));
return LV_FS_RES_OK;
}
/**
* Delete a file
* @param drv pointer to a driver where this function belongs
* @param path path of the file to delete
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_remove (lv_fs_drv_t * drv, const char *path)
{
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
/* Add your code here*/
return res;
}
/**
* Truncate the file size to the current position of the read write pointer
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_fs_open )
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_trunc (lv_fs_drv_t * drv, void * file_p)
{
f_sync((FIL*) file_p); /*If not syncronized fclose can write the truncated part*/
f_truncate((FIL*) file_p);
return LV_FS_RES_OK;
}
/**
* Rename a file
* @param drv pointer to a driver where this function belongs
* @param oldname path to the file
* @param newname path with the new name
* @return LV_FS_RES_OK or any error from 'fs_res_t'
*/
static lv_fs_res_t fs_rename (lv_fs_drv_t * drv, const char * oldname, const char * newname)
{
FRESULT res = f_rename(oldname, newname);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* Get the free and total size of a driver in kB
* @param drv pointer to a driver where this function belongs
* @param letter the driver letter
* @param total_p pointer to store the total size [kB]
* @param free_p pointer to store the free size [kB]
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_free (lv_fs_drv_t * drv, uint32_t * total_p, uint32_t * free_p)
{
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
/* Add your code here*/
return res;
}
and now we dir include
This version work for esp32 if you want!
/**
* @file lv_fs_fatfs.c
* For ESP32
*/
/*********************
* INCLUDES
*********************/
#include <lvgl.h>
#include "ff.h"
#include <SD.h>
/*********************
* DEFINES
*********************/
#define SD_CS 4 // you're CS pin for SPI slave
#define DRIVE_LETTER 'S'
/**********************
* TYPEDEFS
**********************/
/* Create a type to store the required data about your file.*/
typedef FIL file_t;
/*Similarly to `file_t` create a type for directory reading too */
typedef FF_DIR dir_t;
/**********************
* STATIC PROTOTYPES
**********************/
static void fs_init(void);
static lv_fs_res_t fs_open (lv_fs_drv_t * drv, void * file_p, 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);
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 lv_fs_res_t fs_remove (lv_fs_drv_t * drv, const char *path);
static lv_fs_res_t fs_trunc (lv_fs_drv_t * drv, void * file_p);
static lv_fs_res_t fs_rename (lv_fs_drv_t * drv, const char * oldname, const char * newname);
static lv_fs_res_t fs_free (lv_fs_drv_t * drv, uint32_t * total_p, uint32_t * free_p);
static lv_fs_res_t fs_dir_open (lv_fs_drv_t * drv, void * dir_p, const char *path);
static lv_fs_res_t fs_dir_read (lv_fs_drv_t * drv, void * dir_p, char *fn);
static lv_fs_res_t fs_dir_close (lv_fs_drv_t * drv, void * dir_p);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_fs_if_init(void)
{
/*----------------------------------------------------
* Initialize your storage device and File System
* -------------------------------------------------*/
fs_init();
/*---------------------------------------------------
* Register the file system interface in LittlevGL
*--------------------------------------------------*/
/* Add a simple drive to open images */
lv_fs_drv_t fs_drv; /*A driver descriptor*/
lv_fs_drv_init(&fs_drv);
/*Set up fields...*/
fs_drv.file_size = sizeof(file_t);
fs_drv.letter = DRIVE_LETTER;
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.free_space_cb = fs_free;
fs_drv.size_cb = fs_size;
fs_drv.remove_cb = fs_remove;
fs_drv.rename_cb = fs_rename;
fs_drv.trunc_cb = fs_trunc;
fs_drv.rddir_size = sizeof(dir_t);
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)
{
/* Initialisation de la carte SD */
Serial.print(F("Init SD card... "));
if (!SD.begin(SD_CS)) {
Serial.println(F("FAIL"));
for (;;); // appui sur bouton RESET
}
}
/**
* Open a file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable
* @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 LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_open (lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode)
{
uint8_t flags = 0;
if(mode == LV_FS_MODE_WR) flags = FA_WRITE | FA_OPEN_ALWAYS;
else if(mode == LV_FS_MODE_RD) flags = FA_READ;
else if(mode == (LV_FS_MODE_WR | LV_FS_MODE_RD)) flags = FA_READ | FA_WRITE | FA_OPEN_ALWAYS;
FRESULT res = f_open((file_t*) file_p, path, flags);
if(res == FR_OK) {
f_lseek((file_t*) file_p, 0);
return LV_FS_RES_OK;
} else {
return LV_FS_RES_UNKNOWN;
}
}
/**
* 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 lv_ufs_open)
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_close (lv_fs_drv_t * drv, void * file_p)
{
f_close((file_t*) file_p);
return LV_FS_RES_OK;
}
/**
* 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, the file is read
* 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)
{
FRESULT res = f_read((file_t*) file_p, buf, btr, (UINT*)br);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* 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 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)
{
FRESULT res = f_write((file_t*) file_p, buf, btw, (UINT*)bw);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* 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 lv_ufs_open )
* @param pos the new position of read write pointer
* @return LV_FS_RES_OK: no error, the file is read
* 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)
{
f_lseek((file_t*) file_p, pos);
return LV_FS_RES_OK;
}
/**
* Give the size of a file bytes
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a file_t variable
* @param size pointer to a variable to store the size
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_size (lv_fs_drv_t * drv, void * file_p, uint32_t * size_p)
{
(*size_p) = f_size(((file_t *)file_p));
return LV_FS_RES_OK;
}
/**
* 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, the file is read
* 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)
{
*pos_p = f_tell(((file_t *)file_p));
return LV_FS_RES_OK;
}
/**
* Delete a file
* @param drv pointer to a driver where this function belongs
* @param path path of the file to delete
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_remove (lv_fs_drv_t * drv, const char *path)
{
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
/* Add your code here*/
return res;
}
/**
* Truncate the file size to the current position of the read write pointer
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_fs_open )
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_trunc (lv_fs_drv_t * drv, void * file_p)
{
f_sync((file_t*) file_p); /*If not syncronized fclose can write the truncated part*/
f_truncate((file_t*) file_p);
return LV_FS_RES_OK;
}
/**
* Rename a file
* @param drv pointer to a driver where this function belongs
* @param oldname path to the file
* @param newname path with the new name
* @return LV_FS_RES_OK or any error from 'fs_res_t'
*/
static lv_fs_res_t fs_rename (lv_fs_drv_t * drv, const char * oldname, const char * newname)
{
FRESULT res = f_rename(oldname, newname);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* Get the free and total size of a driver in kB
* @param drv pointer to a driver where this function belongs
* @param letter the driver letter
* @param total_p pointer to store the total size [kB]
* @param free_p pointer to store the free size [kB]
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_free (lv_fs_drv_t * drv, uint32_t * total_p, uint32_t * free_p)
{
lv_fs_res_t res = LV_FS_RES_NOT_IMP;
/* Add your code here*/
return res;
}
/**
* Initialize a 'fs_read_dir_t' variable for directory reading
* @param drv pointer to a driver where this function belongs
* @param dir_p pointer to a 'fs_read_dir_t' variable
* @param path path to a directory
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_open (lv_fs_drv_t * drv, void * dir_p, const char *path)
{
FRESULT res = f_opendir((dir_t*)dir_p, path);
if(res == FR_OK) return LV_FS_RES_OK;
else return LV_FS_RES_UNKNOWN;
}
/**
* 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 dir_p pointer to an initialized 'fs_read_dir_t' variable
* @param fn pointer to a buffer to store the filename
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_read (lv_fs_drv_t * drv, void * dir_p, char *fn)
{
FRESULT res;
FILINFO fno;
fn[0] = '\0';
do {
res = f_readdir((dir_t*)dir_p, &fno);
if(res != FR_OK) return LV_FS_RES_UNKNOWN;
if(fno.fattrib & AM_DIR) {
fn[0] = '/';
strcpy(&fn[1], fno.fname);
}
else strcpy(fn, fno.fname);
} while(strcmp(fn, "/.") == 0 || strcmp(fn, "/..") == 0);
return LV_FS_RES_OK;
}
/**
* Close the directory reading
* @param drv pointer to a driver where this function belongs
* @param dir_p pointer to an initialized 'fs_read_dir_t' variable
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_close (lv_fs_drv_t * drv, void * dir_p)
{
f_closedir((dir_t*)dir_p);
return LV_FS_RES_OK;
}
1 Like
Glad to see that it works!
To use JPG images directly you should use RAW color format. TRUE_COLOR will decode the image and create a simple array of pixels.
thx!
this is a video of what i done
i make a fie explorer.
so now, I’can open an image !! I need to add a empty screen between a image and the explorer file to avoid a core panic. (the creation of my dir is a bit slow. is a bit slow but it 's not a probleme).
lv_group_remove_all_objs(Cross);
lv_obj_clean(scr1);
/*Create a list*/
lv_obj_t * list1 = lv_list_create(scr1, NULL);
lv_obj_set_size(list1, 320, 240);
lv_obj_align(list1, NULL, LV_ALIGN_CENTER, 0, 0);
lv_list_set_scroll_propagation(list1, true);
/*Add buttons to the list*/
lv_obj_t * list_btn;
if (fd.actualpath == "S:/") {
list_btn = lv_list_add_btn(list1, LV_SYMBOL_HOME, "Menu");
lv_obj_set_event_cb(list_btn, Back_Menu_Start_event_cb);
}
else
{
list_btn = lv_list_add_btn(list1, LV_SYMBOL_DIRECTORY, "../");
lv_obj_set_event_cb(list_btn, dir_event_cb);
}
for (int m = 0; m < fd.fnum; m++) {
if (fd.lfile[m][0] == '/') {
list_btn = lv_list_add_btn(list1, LV_SYMBOL_DIRECTORY, (char *) fd.lfile[m].c_str());
lv_obj_set_event_cb(list_btn, dir_event_cb);
}
else if (type_file((char *) fd.lfile[m].c_str()) == 'I') {
list_btn = lv_list_add_btn(list1, LV_SYMBOL_IMAGE, (char *) fd.lfile[m].c_str());
lv_obj_set_event_cb(list_btn, dir_event_cb);
}
else if (type_file((char *) fd.lfile[m].c_str()) == 'T') {
list_btn = lv_list_add_btn(list1, LV_SYMBOL_DRIVE, (char *)fd.lfile[m].c_str());
lv_obj_set_event_cb(list_btn, dir_event_cb);
}
else if (type_file((char *) fd.lfile[m].c_str()) == 'U') {
list_btn = lv_list_add_btn(list1, LV_SYMBOL_FILE, (char *) fd.lfile[m].c_str());
lv_obj_set_event_cb(list_btn, dir_event_cb);
}
}
lv_group_add_obj(Cross, list1);
I a have the same issue when i try to read a txt file but i think i can find why. (end of the video).
Have a good day.
I don’t know what the text means when you open a text file 
Form the video it seems you opened a text file and a text appeared.
Are the images opened as JPG?
do you have a complete project file that i can use to test this example i am not able to read files from SD card successfully?
How to show my jpg file from sdcard to my display
is lv_fs_fatfs spi can use tft spi?
when i use same spi to control tft and sdcard.
it always show the “addApbChangeCallback(): duplicate func=400FB0A8 arg=3FFBDD94”.
how to fix it?