262 lines
7.7 KiB
C
262 lines
7.7 KiB
C
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/**
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* @file lv_port_fs_templ.c
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*
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*/
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/*Copy this file as "lv_port_fs.c" and set this value to "1" to enable content*/
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#if 0
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/*********************
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* INCLUDES
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*********************/
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#include "lv_port_fs_template.h"
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#include "lvgl.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void fs_init(void);
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static void * fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode);
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static lv_fs_res_t fs_close(lv_fs_drv_t * drv, void * file_p);
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static lv_fs_res_t fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
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static lv_fs_res_t fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw);
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static lv_fs_res_t fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence);
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static lv_fs_res_t fs_size(lv_fs_drv_t * drv, void * file_p, uint32_t * size_p);
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static lv_fs_res_t fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
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static void * fs_dir_open(lv_fs_drv_t * drv, const char * path);
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static lv_fs_res_t fs_dir_read(lv_fs_drv_t * drv, void * rddir_p, char * fn);
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static lv_fs_res_t fs_dir_close(lv_fs_drv_t * drv, void * rddir_p);
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void lv_port_fs_init(void)
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{
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/*----------------------------------------------------
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* Initialize your storage device and File System
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* -------------------------------------------------*/
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fs_init();
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/*---------------------------------------------------
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* Register the file system interface in LVGL
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*--------------------------------------------------*/
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/*Add a simple drive to open images*/
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static lv_fs_drv_t fs_drv;
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lv_fs_drv_init(&fs_drv);
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/*Set up fields...*/
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fs_drv.letter = 'P';
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fs_drv.open_cb = fs_open;
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fs_drv.close_cb = fs_close;
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fs_drv.read_cb = fs_read;
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fs_drv.write_cb = fs_write;
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fs_drv.seek_cb = fs_seek;
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fs_drv.tell_cb = fs_tell;
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fs_drv.dir_close_cb = fs_dir_close;
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fs_drv.dir_open_cb = fs_dir_open;
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fs_drv.dir_read_cb = fs_dir_read;
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lv_fs_drv_register(&fs_drv);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/*Initialize your Storage device and File system.*/
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static void fs_init(void)
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{
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/*E.g. for FatFS initialize the SD card and FatFS itself*/
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/*You code here*/
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}
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/**
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* Open a file
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* @param drv pointer to a driver where this function belongs
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* @param path path to the file beginning with the driver letter (e.g. S:/folder/file.txt)
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* @param mode read: FS_MODE_RD, write: FS_MODE_WR, both: FS_MODE_RD | FS_MODE_WR
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* @return a file descriptor or NULL on error
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*/
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static void * fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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void * f = NULL;
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if(mode == LV_FS_MODE_WR) {
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/*Open a file for write*/
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f = ... /*Add your code here*/
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}
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else if(mode == LV_FS_MODE_RD) {
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/*Open a file for read*/
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f = ... /*Add your code here*/
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}
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else if(mode == (LV_FS_MODE_WR | LV_FS_MODE_RD)) {
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/*Open a file for read and write*/
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f = ... /*Add your code here*/
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}
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return f;
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}
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/**
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* Close an opened file
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* @param drv pointer to a driver where this function belongs
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* @param file_p pointer to a file_t variable. (opened with fs_open)
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_close(lv_fs_drv_t * drv, void * file_p)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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/**
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* Read data from an opened file
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* @param drv pointer to a driver where this function belongs
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* @param file_p pointer to a file_t variable.
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* @param buf pointer to a memory block where to store the read data
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* @param btr number of Bytes To Read
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* @param br the real number of read bytes (Byte Read)
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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/**
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* Write into a file
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* @param drv pointer to a driver where this function belongs
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* @param file_p pointer to a file_t variable
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* @param buf pointer to a buffer with the bytes to write
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* @param btw Bytes To Write
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* @param bw the number of real written bytes (Bytes Written). NULL if unused.
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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/**
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* Set the read write pointer. Also expand the file size if necessary.
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* @param drv pointer to a driver where this function belongs
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* @param file_p pointer to a file_t variable. (opened with fs_open )
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* @param pos the new position of read write pointer
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* @param whence tells from where to interpret the `pos`. See @lv_fs_whence_t
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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/**
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* Give the position of the read write pointer
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* @param drv pointer to a driver where this function belongs
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* @param file_p pointer to a file_t variable.
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* @param pos_p pointer to to store the result
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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/**
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* Initialize a 'lv_fs_dir_t' variable for directory reading
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* @param drv pointer to a driver where this function belongs
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* @param path path to a directory
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* @return pointer to the directory read descriptor or NULL on error
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*/
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static void * fs_dir_open(lv_fs_drv_t * drv, const char * path)
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{
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void * dir = NULL;
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/*Add your code here*/
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dir = ... /*Add your code here*/
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return dir;
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}
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/**
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* Read the next filename form a directory.
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* The name of the directories will begin with '/'
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* @param drv pointer to a driver where this function belongs
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* @param rddir_p pointer to an initialized 'lv_fs_dir_t' variable
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* @param fn pointer to a buffer to store the filename
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_dir_read(lv_fs_drv_t * drv, void * rddir_p, char * fn)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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/**
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* Close the directory reading
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* @param drv pointer to a driver where this function belongs
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* @param rddir_p pointer to an initialized 'lv_fs_dir_t' variable
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* @return LV_FS_RES_OK: no error or any error from @lv_fs_res_t enum
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*/
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static lv_fs_res_t fs_dir_close(lv_fs_drv_t * drv, void * rddir_p)
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{
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lv_fs_res_t res = LV_FS_RES_NOT_IMP;
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/*Add your code here*/
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return res;
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}
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#else /*Enable this file at the top*/
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/*This dummy typedef exists purely to silence -Wpedantic.*/
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typedef int keep_pedantic_happy;
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#endif
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