1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <peripheral_clk_config.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,
};
lfs_t lfs;
lfs_file_t file;
static int _traverse_df_cb(void *p, lfs_block_t block) {
(void) block;
uint32_t *nb = p;
*nb += 1;
return 0;
}
static int 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 available;
}
static int lfs_ls(lfs_t *lfs, const char *path) {
lfs_dir_t dir;
int err = lfs_dir_open(lfs, &dir, path);
if (err) {
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) {
return err;
}
return 0;
}
void app_init(void) {
}
void app_wake_from_backup(void) {
}
void app_setup(void) {
// mount the filesystem
int err = lfs_mount(&lfs, &cfg);
// reformat if we can't mount the filesystem
// this should only happen on the first boot
if (err) {
lfs_format(&lfs, &cfg);
lfs_mount(&lfs, &cfg);
}
}
void app_prepare_for_standby(void) {
}
void app_wake_from_standby(void) {
}
bool app_loop(void) {
char line[256] = {0};
char *buf;
struct lfs_info info;
read(0, line, 256);
if (strlen(line)) {
printf("$ %s", line);
char *command = strtok(line, " \n");
if (strcmp(command, "ls") == 0) {
char *directory = strtok(NULL, " \n");
if (directory == NULL) {
lfs_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 {
info.type = 0;
lfs_stat(&lfs, filename, &info);
if (info.type == LFS_TYPE_REG) {
if (info.size > 0) {
buf = malloc(info.size);
lfs_file_open(&lfs, &file, filename, LFS_O_RDONLY);
lfs_file_read(&lfs, &file, buf, info.size);
printf("%s\n", buf);
free(buf);
lfs_file_close(&lfs, &file);
} else {
printf("\n");
}
} else {
printf("cat: %s: No such file\n", filename);
}
}
} else if (strcmp(command, "df") == 0) {
printf("free space: %d bytes\n", get_free_space());
} else if (strcmp(command, "rm") == 0) {
char *filename = strtok(NULL, " \n");
if (filename == NULL) {
printf("usage: rm file\n");
} else {
info.type = 0;
lfs_stat(&lfs, filename, &info);
if (info.type == LFS_TYPE_REG) {
lfs_remove(&lfs, filename);
} else {
printf("rm: %s: No such file\n", filename);
}
}
} else if (strcmp(command, "echo") == 0) {
buf = malloc(64);
memset(buf, 0, 64);
size_t pos = 0;
char *text = strtok(NULL, " \n");
while (strcmp(text, ">")) {
sprintf(buf + pos, "%s ", text);
pos += strlen(text) + 1;
text = strtok(NULL, " \n");
if (text == NULL) break;
}
buf[strlen(buf) - 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 {
lfs_file_open(&lfs, &file, filename, LFS_O_RDWR | LFS_O_CREAT | LFS_O_TRUNC);
lfs_file_write(&lfs, &file, buf, strlen(buf));
lfs_file_close(&lfs, &file);
}
free(buf);
} else {
printf("%s: command not found\n", command);
}
}
return false;
}
|
