Before this change there was up to a 128ms delay on incoming payloads from
CPU2 as it was polled by SysTick. Now the RX IRQ immediately schedules the
PendSV.
- Split tables and buffers into SRAM2A/2B.
- Use structs rather than word offsets to access tables.
- Use FLASH_IPCCDBA register value rather than option bytes directly.
Note: the uncrustify configuration is explicitly set to 'add' instead of
'force' in order not to alter the comments which use extra spaces after //
as a means of indenting text for clarity.
