Seems to work every time! No Idea!

Easier to see on the logic analyzer

The first byte will always (?) be 0x00, so we just skip it

This allows us to use the same ISR to receive different lengths of
bytes from the MRAM.

…ay rather than read_device_id

…r, writing to MRAM, reading, and reading device ID all works

I've had bad luck with uint32_t on the MSP in the past.
I don't think it's officially supported
Incrementing down returns the ID backwards for me, so increment up.

This way it shows up in the debugger

Just make naming a little more consistent and add some
comments

Tried to replicate how the code looks in driverlib.h as much as possible
MRAM_camelCase for MRAM function decleratiosn
SPI_camelCase for SPI declerations

delaying cycles after didn't do anything because we had already
exited the ISR

This makes it easier to use understand but mostly for comparing
address values in error handling

This checks to make sure write memory protection doesn't
get in the way of trying to write within a block of memory
by reading the status register provided MRAM

Our MRAM supports bulk transfers (command + address + arbitrary bytes)
for both read and write.

Implements MSP430 builtin hardware CRC as checksum

Reads back data we just wrote and validates the CRC

Just check the CRC immediately after writing.
We can worry about packet structure later if at all.

Gotta redo this later it DOES NOT COMPILE!!

For now just stick this in the I2C.c file  because it works
and I'm getting hungry and tired and need to commit these changes

NOTE: really need to squash this before PR, not now though

Since we are abandoning this for this project