30 lines
844 B
Python
30 lines
844 B
Python
import esp
|
|
|
|
class FlashBdev:
|
|
|
|
SEC_SIZE = 4096
|
|
START_SEC = 0xa0000 // SEC_SIZE
|
|
NUM_BLK = 64
|
|
|
|
def __init__(self, blocks=NUM_BLK):
|
|
self.blocks = blocks
|
|
|
|
def readblocks(self, n, buf):
|
|
print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
|
|
esp.flash_read((n + self.START_SEC) * self.SEC_SIZE, buf)
|
|
|
|
def writeblocks(self, n, buf):
|
|
print("writeblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
|
|
assert len(buf) <= self.SEC_SIZE, len(buf)
|
|
esp.flash_erase(n + self.START_SEC)
|
|
esp.flash_write((n + self.START_SEC) * self.SEC_SIZE, buf)
|
|
|
|
def ioctl(self, op, arg):
|
|
print("ioctl(%d, %r)" % (op, arg))
|
|
if op == 4: # BP_IOCTL_SEC_COUNT
|
|
return self.blocks
|
|
if op == 5: # BP_IOCTL_SEC_SIZE
|
|
return self.SEC_SIZE
|
|
|
|
bdev = FlashBdev()
|