123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
#include <stdio.h>
|
|
#include "lv_port_file.h"
|
|
|
|
#if 1//LV_USE_FILESYSTEM
|
|
|
|
/**
|
|
* 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 void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode)
|
|
{
|
|
FILE *file_p;
|
|
|
|
if (mode == LV_FS_MODE_WR)
|
|
file_p = fopen(path, "wb+");
|
|
else if (mode == LV_FS_MODE_RD)
|
|
file_p = fopen(path, "rb");
|
|
else if (mode == (LV_FS_MODE_WR | LV_FS_MODE_RD))
|
|
file_p = fopen(path, "wb+");
|
|
|
|
return (void *)file_p;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
lv_fs_res_t res = LV_FS_RES_OK;
|
|
|
|
/* Add your code here*/
|
|
fclose((file_p));
|
|
|
|
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, 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)
|
|
{
|
|
lv_fs_res_t res = LV_FS_RES_OK;
|
|
|
|
/* Add your code here*/
|
|
*br = fread((char *)buf, 1, btr, file_p);
|
|
if (*br == 0)
|
|
printf("ftell %d %p %d\n", ftell(file_p), buf, btr);
|
|
|
|
return res;
|
|
}
|
|
|
|
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_OK;
|
|
|
|
/* Add your code here*/
|
|
*bw = fwrite((char *)buf, 1, btw, file_p);
|
|
|
|
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 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, lv_fs_whence_t whence)
|
|
{
|
|
lv_fs_res_t res = LV_FS_RES_OK;
|
|
|
|
/* Add your code here*/
|
|
fseek(file_p, pos, whence);
|
|
|
|
return res;
|
|
}
|
|
|
|
static lv_fs_res_t fs_tell(struct _lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p)
|
|
{
|
|
lv_fs_res_t res = LV_FS_RES_OK;
|
|
|
|
*pos_p = ftell(file_p);
|
|
|
|
return res;
|
|
}
|
|
|
|
void lv_port_fs_init(void)
|
|
{
|
|
static lv_fs_drv_t fs_drv = {0};
|
|
|
|
lv_fs_drv_init(&fs_drv);
|
|
|
|
/*Set up fields...*/
|
|
fs_drv.letter = 'A';
|
|
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;
|
|
|
|
lv_fs_drv_register(&fs_drv);
|
|
}
|
|
#endif
|