Запись в EEPROM

void
Wk_2_FLSH( ucha bank) {         // bank - флаг запису у обидва банки ФЛЕШа - ігноруємо
ucha i;
uint w, cs = 0;
SEBIT( SS_PORT, SS_PIN);      // CS=1
CLBIT( SS_PORT, SS_PIN);      // CS=0 means a begin of sommunication
Send_a_byte( WREN);
SEBIT( SS_PORT, SS_PIN);
CLBIT( SS_PORT, SS_PIN);      // Begin of sommunication. FROM detects the SPI mode
Send_a_byte( WRITE);
Send_a_byte( 0x01);         // We write to FLSH from the 0х100 addr
Send_a_byte( 0x00);
for( i = 0; i < LASTINDEX; i++ ) {
if( ITS_FLSH) {
w = ParsWk[i];
Send_a_byte( (w >> 8) & 0xFF);   // Hi byte
Send_a_byte( w & 0xFF);         // Lo byte
cs += w;                     // omd add to a Checksum
}
}
Send_a_byte( ((~cs) >> 8) & 0xFF);   // Hi byte. Checksum is invirted
Send_a_byte( (~cs) & 0xFF);          // Lo byte
SEBIT( SS_PORT, SS_PIN);            // CS=1
return;
}

//********************************** L O W  L E V E L **************************
//********************************** F L A S H  A N D  F R A M *****************
//********************************** S U B R O U T I N E S *********************
ucha
Send_a_byte( ucha data) {         // CS is set outside!
SPDR = data;
while( !(SPSR & (1<<SPIF))) wdt_risit();
return SPDR;                  // Щоразу, коли штовхнемо байт, SLAVE вкине нам щось
}