////////////////////////////////////////////////////////////////////////////////
// ×òåíèå 8 áèò
u8 spi_r8( void )
{
    while( busy )
        ;
    
    busy = true;
    
    SPDR = 0;
#ifdef SPI_LIMITED_POOLING
    register u8 t = 255;
#endif
    
#ifndef SIMULATOR_DEBUG    
    while( !( SPSR & ( 1 << SPIF ) ) )
    {
#ifdef SPI_LIMITED_POOLING        
        if( !t-- )
            break;
#endif
    }

#else
    #warning Âíèìàíèå! â ðåæèìå îòëàäêè îòêëþ÷åíî îæèäàíèå ôëàãà
#endif
    
    busy = false;
    return SPDR;
}