Only one CanMap can be saved to flash

[jsphuebner]

Currently only one flash location can be specified for saving CAN mappings to. In addition, both CanSdo and TerminalCommands only allow saving one map as well.

[zacck]

@jsphuebner I would like to see if I can use this as an inroad to contributing to open inverter firmware, could you describe an ideal solution?

[jsphuebner]

There is the simple method of modifying CanMap::GetFlashAddress() to return CAN1_FLASH if the device in use is CAN1 and otherwise CAN2_FLASH.

The other method would be to refactor flash saving altogether. It bugs me that there is a hardware dependency in the otherwise hardware independent CanMap class.

So there could be a Flash class that somehow manages flash pages in a backward compatible manner. An instance of that class can then be passed to all modules (CanMap and Params basically) that save things to flash