Simple test¶
Ensure your device works with this simple test.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | ## 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
print(fram[0])
## Or write a sequential value, then read the values back.
## Note: reads return a bytearray. Reads also allocate
## a buffer the size of slice, which may cause
## problems on memory-constrained platforms.
#values = list(range(100)) # or bytearray or tuple
#fram[0:100] = values
#print(fram[0:100])
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