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
|
import sys
import uos
import uerrno
try:
uos.VfsFat
uos.vfs_mkfs
uos.vfs_mount
except AttributeError:
print("SKIP")
sys.exit()
class RAMFS_OLD:
SEC_SIZE = 512
def __init__(self, blocks):
self.data = bytearray(blocks * self.SEC_SIZE)
def readblocks(self, n, buf):
#print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
for i in range(len(buf)):
buf[i] = self.data[n * self.SEC_SIZE + i]
def writeblocks(self, n, buf):
#print("writeblocks(%s, %x)" % (n, id(buf)))
for i in range(len(buf)):
self.data[n * self.SEC_SIZE + i] = buf[i]
def sync(self):
pass
def count(self):
return len(self.data) // self.SEC_SIZE
try:
bdev = RAMFS_OLD(50)
except MemoryError:
print("SKIP")
sys.exit()
uos.vfs_mkfs(bdev, "/ramdisk")
uos.vfs_mount(bdev, "/ramdisk")
# file io
vfs = uos.VfsFat(bdev, "/ramdisk")
with vfs.open("file.txt", "w") as f:
f.write("hello!")
print(vfs.listdir())
with vfs.open("file.txt", "r") as f:
print(f.read())
vfs.remove("file.txt")
print(vfs.listdir())
# umount by device
uos.vfs_umount(bdev)
|
