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import pyb

import time

from pyb import I2C

t24C512= 512 * 1024 / 8 #512 Kbits

t24C256= 256 * 1024 / 8 #256 Kbits

t24C128= 128 * 1024 / 8 #128 Kbits

t24C64= 64 * 1024 / 8 #64 Kbits

i2c = I2C(1, I2C.MASTER)

i2c.init(I2C.MASTER, baudrate=200000)

class SingleEEPROM():

capacity=0

address=0x50

def __init__(self, chipType=t24C512, addr=0x50):

self.capacity=int(chipType)

self.address=int(addr)

def writeEEPROM(self, eeaddress, value):

data = bytearray(3)

data[0]=eeaddress >> 8 #MSB

data[1]=eeaddress & 0xFF #LSB

data[2]=value

i2c.send(data, addr=self.address)

time.sleep(.05)

def readEEPROM(self, eeaddress):

data = bytearray(2)

data[0]=eeaddress >> 8 #MSB

data[1]=eeaddress & 0xFF #LSB

i2c.send(data, addr=self.address)

value=i2c.recv(1, self.address)

return value[0]

def selfTest(self):

i=0

while i<self.capacity:

save=self.readEEPROM(i)

out=pyb.rng() & 0xFF

self.writeEEPROM(i, out)

check=self.readEEPROM(i)

if out==check:

print(("00000000"+hex(i)[2:])[-8:],"passed")

else:

print(("00000000"+hex(i)[2:])[-8:],"failed")

break

i+=1024

print("Capacity:",i,"vs",self.capacity,"declared.")

def test1():

eep=SingleEEPROM(t24C512)

print("Scanning...")

scan=i2c.scan()

if(scan==[]):

print("Uh oh, Houston, we have a problem... No I2C device on the bus...")

return

eep.selfTest()

for i in range(0, 16):

a=eep.writeEEPROM(i, i)

print("Writing",i,"to",i)

for i in range(0, 16):

a=eep.readEEPROM(i)

print(i,"=",a)