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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <peripheral_clk_config.h>
#include "filesystem.h"
#include "watch.h"
#include "lfs.h"
#include "hpl_flash.h"
int lfs_storage_read(const struct lfs_config *cfg, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size);
int lfs_storage_prog(const struct lfs_config *cfg, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size);
int lfs_storage_erase(const struct lfs_config *cfg, lfs_block_t block);
int lfs_storage_sync(const struct lfs_config *cfg);
int lfs_storage_read(const struct lfs_config *cfg, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size) {
(void) cfg;
return !watch_storage_read(block, off, (void *)buffer, size);
}
int lfs_storage_prog(const struct lfs_config *cfg, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size) {
(void) cfg;
return !watch_storage_write(block, off, (void *)buffer, size);
}
int lfs_storage_erase(const struct lfs_config *cfg, lfs_block_t block) {
(void) cfg;
return !watch_storage_erase(block);
}
int lfs_storage_sync(const struct lfs_config *cfg) {
(void) cfg;
return !watch_storage_sync();
}
const struct lfs_config cfg = {
// block device operations
.read = lfs_storage_read,
.prog = lfs_storage_prog,
.erase = lfs_storage_erase,
.sync = lfs_storage_sync,
// block device configuration
.read_size = 16,
.prog_size = NVMCTRL_PAGE_SIZE,
.block_size = NVMCTRL_ROW_SIZE,
.block_count = NVMCTRL_RWWEE_PAGES / 4,
.cache_size = NVMCTRL_PAGE_SIZE,
.lookahead_size = 16,
.block_cycles = 100,
};
static lfs_t lfs;
static lfs_file_t file;
static struct lfs_info info;
static int _traverse_df_cb(void *p, lfs_block_t block) {
(void) block;
uint32_t *nb = p;
*nb += 1;
return 0;
}
int32_t filesystem_get_free_space(void) {
int err;
uint32_t free_blocks = 0;
err = lfs_fs_traverse(&lfs, _traverse_df_cb, &free_blocks);
if(err < 0){
return err;
}
uint32_t available = cfg.block_count * cfg.block_size - free_blocks * cfg.block_size;
return (int32_t)available;
}
static int filesystem_ls(lfs_t *lfs, const char *path) {
lfs_dir_t dir;
int err = lfs_dir_open(lfs, &dir, path);
if (err < 0) {
return err;
}
struct lfs_info info;
while (true) {
int res = lfs_dir_read(lfs, &dir, &info);
if (res < 0) {
return res;
}
if (res == 0) {
break;
}
switch (info.type) {
case LFS_TYPE_REG: printf("file "); break;
case LFS_TYPE_DIR: printf("dir "); break;
default: printf("? "); break;
}
printf("%4ld bytes ", info.size);
printf("%s\n", info.name);
}
err = lfs_dir_close(lfs, &dir);
if (err < 0) {
return err;
}
return 0;
}
bool filesystem_init(void) {
int err = lfs_mount(&lfs, &cfg);
// reformat if we can't mount the filesystem
// this should only happen on the first boot
if (err < 0) {
printf("Ignore that error! Formatting filesystem...\n");
err = lfs_format(&lfs, &cfg);
if (err < 0) return false;
err = lfs_mount(&lfs, &cfg) == LFS_ERR_OK;
printf("Filesystem mounted with %ld bytes free.\n", filesystem_get_free_space());
}
return err == LFS_ERR_OK;
}
bool filesystem_file_exists(char *filename) {
info.type = 0;
lfs_stat(&lfs, filename, &info);
return info.type == LFS_TYPE_REG;
}
bool filesystem_rm(char *filename) {
info.type = 0;
lfs_stat(&lfs, filename, &info);
if (filesystem_file_exists(filename)) {
return lfs_remove(&lfs, filename) == LFS_ERR_OK;
} else {
printf("rm: %s: No such file\n", filename);
return false;
}
}
int32_t filesystem_get_file_size(char *filename) {
if (filesystem_file_exists(filename)) {
return info.size; // info struct was just populated by filesystem_file_exists
}
return -1;
}
bool filesystem_read_file(char *filename, char *buf, int32_t length) {
memset(buf, 0, length);
int32_t file_size = filesystem_get_file_size(filename);
if (file_size > 0) {
int err = lfs_file_open(&lfs, &file, filename, LFS_O_RDONLY);
if (err < 0) return false;
err = lfs_file_read(&lfs, &file, buf, min(length, file_size));
if (err < 0) return false;
return lfs_file_close(&lfs, &file) == LFS_ERR_OK;
}
return false;
}
static void filesystem_cat(char *filename) {
info.type = 0;
lfs_stat(&lfs, filename, &info);
if (filesystem_file_exists(filename)) {
if (info.size > 0) {
char *buf = malloc(info.size + 1);
filesystem_read_file(filename, buf, info.size);
printf("%s\n", buf);
free(buf);
} else {
printf("\n");
}
} else {
printf("cat: %s: No such file\n", filename);
}
}
bool filesystem_write_file(char *filename, char *text, int32_t length) {
int err = lfs_file_open(&lfs, &file, filename, LFS_O_RDWR | LFS_O_CREAT | LFS_O_TRUNC);
if (err < 0) return false;
err = lfs_file_write(&lfs, &file, text, length);
if (err < 0) return false;
return lfs_file_close(&lfs, &file) == LFS_ERR_OK;
}
void filesystem_process_command(char *line) {
printf("$ %s", line);
char *command = strtok(line, " \n");
if (strcmp(command, "ls") == 0) {
char *directory = strtok(NULL, " \n");
if (directory == NULL) {
filesystem_ls(&lfs, "/");
} else {
printf("usage: ls\n");
}
} else if (strcmp(command, "cat") == 0) {
char *filename = strtok(NULL, " \n");
if (filename == NULL) {
printf("usage: cat file\n");
} else {
filesystem_cat(filename);
}
} else if (strcmp(command, "df") == 0) {
printf("free space: %ld bytes\n", filesystem_get_free_space());
} else if (strcmp(command, "rm") == 0) {
char *filename = strtok(NULL, " \n");
if (filename == NULL) {
printf("usage: rm file\n");
} else {
filesystem_rm(filename);
}
} else if (strcmp(command, "echo") == 0) {
char *text = malloc(248);
memset(text, 0, 248);
size_t pos = 0;
char *word = strtok(NULL, " \n");
while (strcmp(word, ">")) {
sprintf(text + pos, "%s ", word);
pos += strlen(word) + 1;
word = strtok(NULL, " \n");
if (word == NULL) break;
}
text[strlen(text) - 1] = 0;
char *filename = strtok(NULL, " \n");
if (filename == NULL) {
printf("usage: echo text > file\n");
} else if (strchr(filename, '/') || strchr(filename, '\\')) {
printf("subdirectories are not supported\n");
} else {
filesystem_write_file(filename, text, strlen(text));
}
free(text);
} else {
printf("%s: command not found\n", command);
}
}
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