kopia lustrzana https://github.com/micropython/micropython
122 wiersze
2.6 KiB
Python
122 wiersze
2.6 KiB
Python
# Test for VfsLittle using a RAM device, file IO
|
|
|
|
try:
|
|
import os
|
|
|
|
os.VfsLfs1
|
|
os.VfsLfs2
|
|
except (ImportError, AttributeError):
|
|
print("SKIP")
|
|
raise SystemExit
|
|
|
|
|
|
class RAMBlockDevice:
|
|
ERASE_BLOCK_SIZE = 1024
|
|
|
|
def __init__(self, blocks):
|
|
self.data = bytearray(blocks * self.ERASE_BLOCK_SIZE)
|
|
|
|
def readblocks(self, block, buf, off):
|
|
addr = block * self.ERASE_BLOCK_SIZE + off
|
|
for i in range(len(buf)):
|
|
buf[i] = self.data[addr + i]
|
|
|
|
def writeblocks(self, block, buf, off):
|
|
addr = block * self.ERASE_BLOCK_SIZE + off
|
|
for i in range(len(buf)):
|
|
self.data[addr + i] = buf[i]
|
|
|
|
def ioctl(self, op, arg):
|
|
if op == 4: # block count
|
|
return len(self.data) // self.ERASE_BLOCK_SIZE
|
|
if op == 5: # block size
|
|
return self.ERASE_BLOCK_SIZE
|
|
if op == 6: # erase block
|
|
return 0
|
|
|
|
|
|
def test(bdev, vfs_class):
|
|
print("test", vfs_class)
|
|
|
|
# mkfs
|
|
vfs_class.mkfs(bdev)
|
|
|
|
# construction
|
|
vfs = vfs_class(bdev)
|
|
|
|
# create text, print, write, close
|
|
f = vfs.open("test.txt", "wt")
|
|
print(f)
|
|
f.write("littlefs")
|
|
f.close()
|
|
|
|
# close already-closed file
|
|
f.close()
|
|
|
|
# create binary, print, write, flush, close
|
|
f = vfs.open("test.bin", "wb")
|
|
print(f)
|
|
f.write("littlefs")
|
|
f.flush()
|
|
f.close()
|
|
|
|
# create for append
|
|
f = vfs.open("test.bin", "ab")
|
|
f.write("more")
|
|
f.close()
|
|
|
|
# create exclusive
|
|
f = vfs.open("test2.bin", "xb")
|
|
f.close()
|
|
|
|
# create exclusive with error
|
|
try:
|
|
vfs.open("test2.bin", "x")
|
|
except OSError:
|
|
print("open OSError")
|
|
|
|
# read default
|
|
with vfs.open("test.txt", "") as f:
|
|
print(f.read())
|
|
|
|
# read text
|
|
with vfs.open("test.txt", "rt") as f:
|
|
print(f.read())
|
|
|
|
# read binary
|
|
with vfs.open("test.bin", "rb") as f:
|
|
print(f.read())
|
|
|
|
# create read and write
|
|
with vfs.open("test.bin", "r+b") as f:
|
|
print(f.read(8))
|
|
f.write("MORE")
|
|
with vfs.open("test.bin", "rb") as f:
|
|
print(f.read())
|
|
|
|
# seek and tell
|
|
f = vfs.open("test.txt", "r")
|
|
print(f.tell())
|
|
f.seek(3, 0)
|
|
print(f.tell())
|
|
f.close()
|
|
|
|
# open nonexistent
|
|
try:
|
|
vfs.open("noexist", "r")
|
|
except OSError:
|
|
print("open OSError")
|
|
|
|
# open multiple files at the same time
|
|
f1 = vfs.open("test.txt", "")
|
|
f2 = vfs.open("test.bin", "b")
|
|
print(f1.read())
|
|
print(f2.read())
|
|
f1.close()
|
|
f2.close()
|
|
|
|
|
|
bdev = RAMBlockDevice(30)
|
|
test(bdev, os.VfsLfs1)
|
|
test(bdev, os.VfsLfs2)
|