I tried the example in section "Custom Block Device" at below link to study MPY filesystem. I change number of sectors, from 1, 10, 20, 30, 40. All mkfs failed with error
Code: Select all
OSError: [Errno 5] EIO
https://docs.micropython.org/en/latest/ ... ystem.html
Code: Select all
class RAMBlockDev:
def __init__(self, block_size, num_blocks):
self.block_size = block_size
self.data = bytearray(block_size * num_blocks)
def readblocks(self, block_num, buf):
for i in range(len(buf)):
buf[i] = self.data[block_num * self.block_size + i]
def writeblocks(self, block_num, buf):
for i in range(len(buf)):
self.data[block_num * self.block_size + i] = buf[i]
def ioctl(self, op, arg):
if op == 4: # get number of blocks
return len(self.data) // self.block_size
if op == 5: # get block size
return self.block_size
import os
bdev = RAMBlockDev(512, 50)
os.VfsFat.mkfs(bdev)
os.mount(bdev, '/ramdisk')
Many thanks.