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import sys
import uos
try:
uos.VfsFat
except AttributeError:
print("SKIP")
sys.exit()
class RAMFS:
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 ioctl(self, op, arg):
#print("ioctl(%d, %r)" % (op, arg))
if op == 4: # BP_IOCTL_SEC_COUNT
return len(self.data) // self.SEC_SIZE
if op == 5: # BP_IOCTL_SEC_SIZE
return self.SEC_SIZE
bdev = RAMFS(48)
uos.VfsFat.mkfs(bdev)
assert b"FOO_FILETXT" not in bdev.data
assert b"hello!" not in bdev.data
vfs = uos.VfsFat(bdev, "/ramdisk")
f = vfs.open("foo_file.txt", "w")
f.write("hello!")
f.close()
f2 = vfs.open("foo_file.txt")
print(f2.read())
f2.close()
assert b"FOO_FILETXT" in bdev.data
assert b"hello!" in bdev.data
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