/*-------------------------------------------------------------------
**
**  Soluciones del examen de Programación de Sistemas y Dispositivos
**  Curso 2015-16, Convocatoria de Junio, 21 de junio de 2016
**
**-----------------------------------------------------------------*/

/*-------------------------------------------------------------------
**    Ejercicio 1
**-----------------------------------------------------------------*/

#include <s3c44b0x.h>
#include <common_types.h>
#include <system.h>
#include <uart.h>
#include <rtc.h>

void isr_tick( void ) __attribute__ ((interrupt ("IRQ")));

volatile boolean flag;

void main( void )
{
    sys_init();
    uart0_init();
    rtc_init();

    flag = FALSE;
    rtc_open( isr_tick, 127 );

    while( 1 )
        if( flag )
        {
            uart0_puts( "Ha transcurrido una hora.\n" );
            flag = FALSE;
        }
}

void isr_tick( void )
{
    static uint16 numSecs = 0;

    if( ++numSecs == 3600 )
    {
        numSecs = 0;
        flag = TRUE;
    }

    I_ISPC = BIT_TICK;
}

/*-------------------------------------------------------------------
**    Ejercicio 2
**-----------------------------------------------------------------*/

#include <fix_types.h>

#define QM 8

ufix16 circumference( ufix16 radius )
{
    const ufix16 doublePi = TOFIX( ufix16, 2*3.141592654, QM );
    
    return FMUL( doublePi, radius, QM );
}

/*-------------------------------------------------------------------
**    Ejercicio 3
**-----------------------------------------------------------------*/

#include <s3c44b0x.h>
#include <common_types.h>
#include <uart.h>

void uart0_portDump( uint32 portConfAddr )
{
    uint32 pConf;
    uint8 i;
    
    switch( portConfAddr )
    {
        case (uint32)&PCONA:
            uart0_puts( "CONFIGURACION DEL PUERTO A\n" );
            pConf = PCONA;
            for( i=0; i<10; i++ )
            {
                uart0_puts( "Pin " );
                uart0_putint( i );
                switch( pConf & 0x1 )
                {
                    case 0:
                        uart0_puts( ": salida\n" );
                        break;
                    default:
                        uart0_puts( ": interno\n" );
                        break;
                }
                pConf >>= 1;
            }
            break;
        case (uint32)&PCONB:
            break;
        case (uint32)&PCONC:
            uart0_puts( "CONFIGURACION DEL PUERTO C\n" );
            pConf = PCONC;
            for( i=0; i<16; i++ )
            {
                uart0_puts( "Pin " );
                uart0_putint( i );
                switch( pConf & 0x3 )
                {
                    case 0:
                        uart0_puts( ": entrada\n" );
                        break;
                    case 1:
                        uart0_puts( ": salida\n" );
                        break;
                    default:
                        uart0_puts( ": interno\n" );
                        break;
                }                
                pConf >>= 2;
            }
            break;
        case (uint32)&PCOND:
            break;
        case (uint32)&PCONE:
            break;
        case (uint32)&PCONF:
            break;
        case (uint32)&PCONG:
            break;
        default:
               uart0_puts( "Direccion de puerto erronea\n" );
            break;            
    }

}