kopia lustrzana https://github.com/micropython/micropython
69 wiersze
2.0 KiB
Python
69 wiersze
2.0 KiB
Python
import esp
|
|
|
|
class FlashBdev:
|
|
|
|
SEC_SIZE = 4096
|
|
START_SEC = 0x89000 // SEC_SIZE
|
|
NUM_BLK = 0x73
|
|
|
|
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
|
|
|
|
def set_bl_flash_size(real_size):
|
|
if real_size == 256*1024:
|
|
code = 1
|
|
elif real_size == 512*1024:
|
|
code = 0
|
|
elif real_size == 1024*1024:
|
|
code = 2
|
|
elif real_size == 2048*1024:
|
|
code = 3
|
|
elif real_size == 4096*1024:
|
|
code = 4
|
|
else:
|
|
code = 2
|
|
buf = bytearray(4096)
|
|
esp.flash_read(0, buf)
|
|
buf[3] = (buf[3] & 0xf) | (code << 4)
|
|
esp.flash_erase(0)
|
|
esp.flash_write(0, buf)
|
|
|
|
# If bootloader size ID doesn't correspond to real Flash size,
|
|
# fix bootloader value and reboot.
|
|
size = esp.flash_id() >> 16
|
|
# Check that it looks like realistic power of 2 for flash sizes
|
|
# commonly used with esp8266
|
|
if 22 >= size >= 18:
|
|
size = 1 << size
|
|
if size != esp.flash_size():
|
|
import machine
|
|
import time
|
|
print("Bootloader Flash size appear to have been set incorrectly, trying to fix")
|
|
set_bl_flash_size(size)
|
|
machine.reset()
|
|
while 1: time.sleep(1)
|
|
|
|
size = esp.flash_size()
|
|
if size < 1024*1024:
|
|
bdev = None
|
|
else:
|
|
# 16K at the flash end is reserved for SDK params storage
|
|
bdev = FlashBdev((size - 16384) // FlashBdev.SEC_SIZE - FlashBdev.START_SEC)
|