#include "globals.h"

int readUserBlock(FlashStruct *mem)
{
	// read the /root/flash.copy file into the mem struct
	// and return the number of bytes read in

	// if the file does not exist, then "return 0";
	return 0;
}

void writeUserBlock(FlashStruct *mem, int addr, int numbytes)
{
	// check if /root/flash.copy file exists
	// - if it does, update the requested address and
	//   number of bytes, use fseek / fwrite / fflush

	// - if does not, create the file and
	//   set addr = 0, numbytes = sizeof (mem)
	//   so that entire struct will be written,
	//   instead of just the requested range

	// All writing should be done in a super-safe 
	// way. Non-corruption, even during a power-off transient,
	// is the priority here. We do not want instruments
	// losing configuration data ever, because that
	// means expensive repairs.
}

void initFlash(FlashStruct *mem)
{
	if (readUserBlock(mem) > 0) return;

	// uninitialized device!
	mem->flash_start = (char) 99;
	strcpy(mem->aux_error_message,"FIXME");
	mem->channels = (short) 1;
	mem->enable_avrq_extra_ampls = (char) 12;
	mem->ChanKey_frequency = (char) 0;
	// much more needs to be added here - later

	// save the default Flash config, for nonvolatile persistence
	writeUserBlock(mem, 0, sizeof(mem));
}