import board
import busio
from adafruit_atecc.adafruit_atecc import ATECC, _WAKE_CLK_FREQ
# Initialize the i2c bus
i2c = busio.I2C(board.SCL, board.SDA, frequency=_WAKE_CLK_FREQ)
# Initialize a new atecc object
atecc = ATECC(i2c)
print("ATECC Serial: ", atecc.serial_number)
# Generate a random number with a maximum value of 1024
print("Random Value: ", atecc.random(rnd_max=1024))
# Print out the value from one of the ATECC's counters
# You should see this counter increase on every time the code.py runs.
print("ATECC Counter #1 Value: ", atecc.counter(1, increment_counter=True))
# Initialize the SHA256 calculation engine
atecc.sha_start()
# Append bytes to the SHA digest
print("Appending to the digest...")
atecc.sha_update(b"Nobody inspects")
print("Appending to the digest...")
atecc.sha_update(b" the spammish repetition")
# Return the digest of the data passed to sha_update
message = atecc.sha_digest()
print("SHA Digest: ", message)
# Organization Name
MY_ORG = "Adafruit"
# Organizational Unit Name
MY_SECTION = "Crypto"
# Which ATECC slot (0-4) to use
ATECC_SLOT = 0
# Generate new private key, or use existing key
GENERATE_PRIVATE_KEY = True
# -- END Configuration, code below -- #
# Initialize the i2c bus
i2c = busio.I2C(board.SCL, board.SDA, frequency=_WAKE_CLK_FREQ)
# Initialize a new atecc object
atecc = ATECC(i2c)
print("ATECC Serial Number: ", atecc.serial_number)
if not atecc.locked:
if not LOCK_ATECC:
raise RuntimeError(
"The ATECC is not locked, set LOCK_ATECC to True in code.py."
)
print("Writing default configuration to the device...")
atecc.write_config(CFG_TLS)
print("Wrote configuration, locking ATECC module...")
# Lock ATECC config, data, and otp zones
atecc.lock_all_zones()
print("ATECC locked!")
MY_ORG = "Adafruit"
# Organizational Unit Name
MY_SECTION = "Crypto"
# Which ATECC slot (0-4) to use
ATECC_SLOT = 1
# Generate new private key, or use existing key
GENERATE_PRIVATE_KEY = False
# -- END Configuration, code below -- #
# Initialize the i2c bus
i2c = busio.I2C(board.SCL, board.SDA,
frequency=_WAKE_CLK_FREQ)
# Initialize an atecc object
atecc = ATECC(i2c, debug=False)
print("ATECC Serial Number: ", atecc.serial_number)
if not atecc.locked:
if not LOCK_ATECC:
raise RuntimeError("The ATECC is not locked, set LOCK_ATECC to True in your code to unlock it.")
print("Writing default configuration to the device...")
atecc.write_config(adafruit_atecc.CFG_TLS)
print("Wrote configuration, locking ATECC module...")
# lock configuration zone
atecc.lock(lock_config=True)
# lock data and otp zones
atecc.lock(lock_data_otp=True)
print("ATECC locked!")