1- A thermocouple delivers roughly 1mV every 25 degrees of delta-T,
i.e. 40uV/deg.  The internal ADC of the microcontroller is a 12 bit
device, GND-to-Vcc: this means slighty better than 1mV per step, on a
3.3V power supply.  Draw the circuit and write the code to be able to
sample a thermocouple using the internal ADC (hint: we might use an
LM324 amplifier).  This was discussed during lesson 21.

2- Write the I2C driver for the microcontroller's logic block. Now
that we have an I2C framework (with struct i2c_operations), it's
easier than it earlier was.

3- Augment the shell with commands to read/write spi-nor and i2c-eeprom
devices. This is also needed as a test environment for the driver code

4- Find a better way to support IAP memory than removing 32 bytes of RAM.
Ideally, if the application is not using IAP, it doesn't need to reserve
RAM for those routines.

5- Connect the three storage engines we already have (spi-nor,
eeprom-i2c, eeprom-lpc) to the storage.h idea, adding an API
(e.g. storage_register()/storage_unregister()). If more fields
are needed in the storage structure, they should be added.

6- Augment the shell with test commands for the above generic
storage.

7- Think about a filesystem API, that can support several back-ends

8- Implement a TLV-based filesystem based on the above