Remote Access Control

memory.c

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// This file has been prepared for Doxygen automatic documentation generation.
#include "memory.h"
#include "common.h"
#include "config.h"



/* --- EEPROM memory contents --- */

// Variables at absolute addresses are defined in the header file only.



/* --- SRAM memory contents --- */

ReceiveBuffer receiveBuffer;
byte scheduleBuffer[ SCHEDULE_BUFFER_SIZE ];
byte cryptoBlock[ BLOCK_SIZE ];
byte CMACSubkey[ CMAC_SUBKEY_SIZE ];
byte tempKeyStorage[ KEY_SIZE ];



/* --- Associated functions --- */

static uint16_t bytesToErase;



#pragma vector = EE_RDY_vect
__interrupt void eepromHandler(void)
{
        if( bytesToErase ) {
                ++EEAR;
                EECR |= (1<<EEMPE);
                EECR |= (1<<EEPE);
                --bytesToErase;
        } else {
                EECR &= ~(1<<EERIE); // Disable further interrupts.
        }
}



/* IAR header file bug fix */
#ifndef EEPM1
  #define EEPM1 5
#endif
#ifndef EEPM0
  #define EEPM0 4
#endif



void eraseTransmitters(void)
{
        bytesToErase = sizeof( TransmitterInfo ) * transmitterCount;
        do {} while( EECR & (1<<EEPE) );
        EECR = (0<<EEPM1) | (1<<EEPM0); // Erase-Only Mode.
        EEAR = ((uint16_t) transmitters) - 1;
        EECR |= (1<<EERIE);
        while( bytesToErase ) {
                __sleep();
        }
        do {} while( EECR & (1<<EEPE) );
        EECR = (0<<EEPM1) | (0<<EEPM0); // Back to Atomic Mode.
        transmitterCount = 0;
}