# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT
## Simple Example For CircuitPython/Python I2C FRAM Library
import board
import busio
import adafruit_fram
## Create a FRAM object (default address used).
i2c = busio.I2C(board.SCL, board.SDA)
fram = adafruit_fram.FRAM_I2C(i2c)
## Optional FRAM object with a different I2C address, as well
## as a pin to control the hardware write protection ('WP'
## pin on breakout). 'write_protected()' can be used
## independent of the hardware pin.
# import digitalio
# wp = digitalio.DigitalInOut(board.D10)
# fram = adafruit_fram.FRAM_I2C(i2c,
# address=0x53,
# wp_pin=wp)
## Write a single-byte value to register address '0'
fram[0] = 1
## Read that byte to ensure a proper write.
## Note: reads return a bytearray
"""`frams`
FRAM stuff
"""
import board
import busio
import adafruit_fram
import struct
__version__ = "beta"
i2c = busio.I2C(board.SCL, board.SDA)
fram = adafruit_fram.FRAM_I2C(i2c, address=0x50)
# check if addresses are free to use
def checkfree(size, address):
for i in range(size):
if size < 4:
return True
break
# check address is free
if fram[address + i] != bytearray(b'\xff'):
# show first address in use
print('Address', (address + i), 'first to fail checkfree')
print('Use "frams.erase({},'.format(size - i),
'{})""'.format(address + i))
return False
break
print('Addresses needed are free to write.')
return True
