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# I2C Memory : 24LC512
# Wired : A0, A1, A2 and WP to Vss (GND)
#         4k7 pullup resistors to Vdd (3.3V) on SCL and SDA pins
# The I2C memory response '80' to a i2c.scan()

from machine import Pin, I2C
from time import sleep_ms

I2C_BUS = I2C(1, scl=Pin(22), sda=Pin(21), freq=400000)

# Address in the 24LC512 where I try to read/write some data
adress_stock = 0x10 
print("Adress R/W : ", adress_stock)

# Is there something before I try to write ?
print("Read before : ", I2C_BUS.readfrom_mem(80, adress_stock, 4 ) )
sleep_ms(10)

# Try to write '0x1234' in the memory at 0x10 adress
val = b'1234'
print("try to write : ", val )
I2C_BUS.writeto_mem(80, adress_stock, val)
sleep_ms(10)

# Does the memory received and stocked the information ?
print("verify : ", I2C_BUS.readfrom_mem(80, adress_stock, 4) )