def setUp(self):
# reset and zero efuses
serialport.dtr = False
serialport.rts = True
time.sleep(0.05)
serialport.rts = False
time.sleep(0.05)
serialport.dtr = True
# connect & verify efuses are really zero
self.esp = esptool.ESP32ROM(serialport)
self.esp.connect('no_reset') # takes ~7 seconds
self.efuses = espefuse.EspEfuses(self.esp)
# Check every efuse is zero (~1 second)
for efuse in self.efuses:
val = efuse.get_raw()
BAD_EFUSE_MSG = "Efuse %s not all zeroes - either this is a real ESP32 chip (VERY BAD, read top of file), or the reset is not erasing all efuses correctly." % efuse.register_name
try:
self.assertEqual(b'\x00' * len(val), val, BAD_EFUSE_MSG)
except TypeError:
self.assertEqual(0, val, BAD_EFUSE_MSG)
def valid_key_present(self):
esp = esptool.ESP32ROM(serialport)
esp.connect()
efuses = espefuse.EspEfuses(esp)
blk1_rd_en = efuses["BLK1"].is_readable()
return not blk1_rd_en
def _set_34_coding_scheme(self):
self.efuses["CODING_SCHEME"].burn(1)
# EspEfuses constructor needs to re-load CODING_SCHEME
self.efuses = espefuse.EspEfuses(self.esp)