uint8_t flag;
...
ISR(SOME_vect) {
  flag = 1;
}
...

        while (flag == 0) {
                ...
        }

volatile uint8_t flag;

volatile uint8_t    AvarFuelWt, AvarCAN=0,                // Счётчик секунд задержки на потерю топлива и CAN
                    CAN_Temp,                            // Значение температуры двигателя по CAN
                    CAN_POil;                            // Значение давления масла двигателя по CAN

if((timesec--)==0)
{
   timesec=FPWM;
   Flag.fSecond=1;
   AvarFuelWt++;
   AvarCAN++;
}

    if(AvarCAN>2)                                        // Обработка потери CAN
      CAN_Temp=CAN_POil=0;                                // Обнулить значение

    540              if(AvarCAN>2)                                        // Обработка потери CAN
   \                     ??main_16:
   \   00000182   8D05               LDD     R16, Z+29
   \   00000184   3003               CPI     R16, 3
   \   00000186   F018               BRCS    ??main_17
    541                CAN_Temp=CAN_POil=0;                                // Обнулить значение
   \   00000188   E000               LDI     R16, 0
   \   0000018A   8F07               STD     Z+31, R16
   \   0000018C   8F06               STD     Z+30, R16

volatile uint8_t    AvarFuelWt, AvarCAN=0;                // Счётчик секунд задержки на потерю топлива и CAN
uint8_t                CAN_Temp,                            // Значение температуры двигателя по CAN
                    CAN_POil;                            // Значение давления масла двигателя по CAN

    545              if(AvarCAN>2)                                        // Обработка потери CAN
   \                     ??main_16:
   \   00000182   8D05               LDD     R16, Z+29
    546                CAN_Temp=CAN_POil=0;                                // Обнулить значение
    547              // Обработка АЦП и выставление положения стрелок

typedef struct tagRTC_TIME
{
    U16 Ticks;
    U8   seconds;
    U8   minutes;
    U8   hours;
    U8   day;
    U8   month;
    U16 year;
} TRTC_TIME, *PRTC_TIME;

TRTC_TIME rtcTime;

Building configuration: pwr_control - Release
Updating build tree...
main.c
Linking
Error[e16]: Segment CODE (size: 0x202e align: 0x1) is too long for segment definition. At least 0xa0 more bytes  
needed. The problem occurred while processing the segment placement command  
"-Z(CODE)CODE=26-1FFF", where at the moment of placement the available memory ranges were  
"CODE:72-1fff"
   Reserved ranges relevant to this placement:
   CODE:26-3d           NEAR_F
   CODE:3e-65           SWITCH
   CODE:66-71           INITTAB
   CODE:72-1fff         ?FILL1
Error[e16]: Segment TINY_ID (size: 0 align: 0) is too long for segment definition. At least 0 more bytes needed.  
The problem occurred while processing the segment placement command  
"-Z(CODE)TINY_ID,NEAR_ID=26-1FFF", where at the moment of placement the available memory ranges  
were "-none-"
   Reserved ranges relevant to this placement:
   CODE:26-3d           NEAR_F
   CODE:3e-65           SWITCH
   CODE:66-71           INITTAB
   CODE:72-1fff         ?FILL1
Error[e16]: Segment NEAR_ID (size: 0xe1 align: 0) is too long for segment definition. At least 0xe1 more bytes  
needed. The problem occurred while processing the segment placement command  
"-Z(CODE)TINY_ID,NEAR_ID=26-1FFF", where at the moment of placement the available memory ranges  
were "-none-"
   Reserved ranges relevant to this placement:
   CODE:26-3d           NEAR_F
   CODE:3e-65           SWITCH
   CODE:66-71           INITTAB
   CODE:72-1fff         ?FILL1
Error[e16]: Segment CHECKSUM (size: 0x2 align: 0) is too long for segment definition. At least 0x2 more bytes  
needed. The problem occurred while processing the segment placement command  
"-Z(CODE)CHECKSUM#1FFF", where at the moment of placement the available memory ranges were  
"-none-"
   Reserved ranges relevant to this placement:
   CODE:0-17            INTVEC
   CODE:18-25           NEAR_ID
   CODE:26-3d           NEAR_F
   CODE:3e-65           SWITCH
   CODE:66-71           INITTAB
   CODE:72-1fff         ?FILL1
Error[e18]: Range error,  
Address out of range. Valid range is 0 to 8190 (0x1FFE).
File: E:\_CRYPTOSOFT\PWR_CONTROL\SRC\util.c, Line: 240  
Source: RCALL   ?PROLOGUE4_L09
  Where $ = slow_crc16 [0x370]
            in module "main" (E:\_CRYPTOSOFT\PWR_CONTROL\SRC\Release\Obj\main.r90),
            offset 0x0 in segment part 159, segment CODE
  What: ?PROLOGUE4_L09 [0x2000]
  Allowed range: 0x0 - 0x1FFE
  Operand: ?PROLOGUE4_L09 [0x2000]
           in module ?PROLOGUE_L09 (D:\Program Files\IAR Systems\Embedded Workbench 4.0 Evaluation\
avr\LIB\CLIB\cl1s-ec_mul.r90),
           Offset 0x0 in segment part 12, segment CODE
Error[e18]: Range error,  
Address out of range. Valid range is 0 to 8190 (0x1FFE).
File: E:\_CRYPTOSOFT\PWR_CONTROL\SRC\util.c, Line: 257  
Source: RJMP    ?EPILOGUE_B4_L09
  Where $ = slow_crc16 + 0x56  [0x3C6]
            in module "main" (E:\_CRYPTOSOFT\PWR_CONTROL\SRC\Release\Obj\main.r90),
            offset 0x56 in segment part 159, segment CODE
  What: ?EPILOGUE_B4_L09 [0x201A]
  Allowed range: 0x0 - 0x1FFE
  Operand: ?EPILOGUE_B4_L09 [0x201a]
           in module ?EPILOGUE_B_L09 (D:\Program Files\IAR Systems\Embedded Workbench 4.0 Evaluation\
avr\LIB\CLIB\cl1s-ec_mul.r90),
           Offset 0x0 in segment part 12, segment CODE
Error[e18]: Range error,  
Address out of range. Valid range is 0 to 8190 (0x1FFE).
File: E:\_CRYPTOSOFT\PWR_CONTROL\SRC\rdc.c, Line: 29  
Source: RCALL   ?PROLOGUE2_L09
  Where $ = BeginDataWriteToRDC [0x3C8]
            in module "main" (E:\_CRYPTOSOFT\PWR_CONTROL\SRC\Release\Obj\main.r90),
            offset 0x0 in segment part 160, segment CODE
  What: ?PROLOGUE2_L09 [0x2004]
  Allowed range: 0x0 - 0x1FFE
  Operand: ?PROLOGUE2_L09 [0x2004]
           in module ?PROLOGUE_L09 (D:\Program Files\IAR Systems\Embedded Workbench 4.0 Evaluation\
avr\LIB\CLIB\cl1s-ec_mul.r90),
           Offset 0x0 in segment part 14, segment CODE
.......
ну и так далее
.......
Total number of errors: 33
Total number of warnings: 0

#if(CheckMCU)
  sum = slow_crc16(sum,(unsigned char __flash *)0, (unsigned long)&__checksum);
  // call with two 0 bytes for the correct calculation of crc
  sum = slow_crc16(sum,(unsigned char __flash *)&zero,2);                      
...
#endif

memcpy( &BufLog[ 1 ], &rtcTime, sizeof( rtcTime ));

void store_to_eeprom( int dst_addr, void *pData, int size)
{
      unsigned char *p = (unsigned char *)pData;
      while( size--)
           EEPROM_write_byte( dst_addr++, *p++);
}

store_to_eeprom( RTC_OFFSET, &rtcTime, sizeof( rtcTime ));

typedef struct __Reg
{  
char bit0: 1;
char bit1: 1;
....
char bit4567: 4:
} Reg_t

void Fn(...)
{
Reg_t RegA;
RegA.bit0 = 1;
RegA.bit1 ^= RegA.bit0;

RegA.bit4567 = 5;

}