Quck notes on MPC23107 implementation on the Rose Board

Rose MPC23107 micropython

i2c MPC23107

from machine import I2C,Pin
i2c = I2C(-1,Pin(14),Pin(2))
i2c.scan()

[IOCON x0A BANK (0 is default)]
i2c.readfrom_mem(32,10,1) (returns b'\x00')

[IODIRA initial read]
i2c.readfrom_mem(32,0,1) returns (b'\xff')

[IODIRA x00 set to 00 (all outputs)]
[I2C.writeto_mem(addr, memaddr, buf, *, addrsize=8)]
i2c.writeto_mem(32,0,b'\x00')

then re-read should be \x00
i2c.readfrom_mem(32,0,1) returns (b'\x00') [yaaas!]

[GPIOA x12 set 1 (gpa0 high)]
x12 is decimal 18
i2c.readfrom_mem(32,18,1) returns b'\x00' everything off
i2c.writeto_mem(32,18,b'\x01')
i2c.readfrom_mem(32,18,1) returns b'\x01' gpa0 on! verified with voltmeter!
turn off GPA0
i2c.writeto_mem(32,18,b'\x00')

i2c.start()

i2c.stop()

---------regard later
or maybe OLAT
---------regard later



i2c.start()
i2c.writeto(32,b'0')
i2c.writeto(32,b'0')
i2c.stop()
i2c.start()
i2c.writeto(32,b'\x12')
i2c.writeto(32,b'255')
i2c.stop()

#i2c.start()
i2c.writeto(32,b'9')
i2c.writeto(32,b'1')
i2c.stop()