1try:
2    import uerrno
3    import uos
4except ImportError:
5    print("SKIP")
6    raise SystemExit
7
8try:
9    uos.VfsFat
10except AttributeError:
11    print("SKIP")
12    raise SystemExit
13
14
15class RAMFS_OLD:
16
17    SEC_SIZE = 512
18
19    def __init__(self, blocks):
20        self.data = bytearray(blocks * self.SEC_SIZE)
21
22    def readblocks(self, n, buf):
23        # print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
24        for i in range(len(buf)):
25            buf[i] = self.data[n * self.SEC_SIZE + i]
26
27    def writeblocks(self, n, buf):
28        # print("writeblocks(%s, %x)" % (n, id(buf)))
29        for i in range(len(buf)):
30            self.data[n * self.SEC_SIZE + i] = buf[i]
31
32    def sync(self):
33        pass
34
35    def count(self):
36        return len(self.data) // self.SEC_SIZE
37
38
39try:
40    bdev = RAMFS_OLD(50)
41except MemoryError:
42    print("SKIP")
43    raise SystemExit
44
45uos.VfsFat.mkfs(bdev)
46vfs = uos.VfsFat(bdev)
47uos.mount(vfs, "/ramdisk")
48
49# file io
50with vfs.open("file.txt", "w") as f:
51    f.write("hello!")
52
53print(list(vfs.ilistdir()))
54
55with vfs.open("file.txt", "r") as f:
56    print(f.read())
57
58vfs.remove("file.txt")
59print(list(vfs.ilistdir()))
60