//ICC-AVR application builder : 2011/12/1 20:30:09
// Target : m48
// Crystal: 8.0000Mhz

#include <iom48v.h>
#include <macros.h>

#define PSCL  PC5  //LED+
#define PSDA  PC4  //LED-

//   按键编号　引脚编号

#define P07   PB5  //  5  //SCK
#define P08   PB4  //  4  //MISO

#define P12   PB3  //  3  //MOSI

#define on    1
#define off   0

//引脚编号=K[按键编号]
unsigned ]={,,,,,,,,,,,,,,,,,,,,};

void led(unsigned char on_off)
{
    if(on_off)  PORTC &= ~BIT(PSDA);
    else        PORTC |= BIT(PSDA);
}

void key_tst_prep(unsigned char k)
{
    PORTB = 0xFF;
    DDRB  = 0x00;
    PORTC |= 0x6F;
    DDRC  = 0x30;
    PORTD = 0xFF;
    DDRD  = 0x00;

    PCMSK0 = 0x00; //pin change mask 0
    PCMSK1 = 0x00; //pin change mask 1
    PCMSK2 = 0x00; //pin change mask 2
    PCIFR = 0x07; //clear pin change flag2...0
    PCICR = 0x07; //pin change enable 

    )
    {
        PORTB &= ~(<<k);
        DDRB |= (<<k);
    }
    )
    {
        k-=;
        PORTC &= ~(<<k);
        DDRC |= (<<k);
    }
    )
    {
        k-=;
        PORTD &= ~(<<k);
        DDRD |= (<<k);
    }
}

void key_tst_start(unsigned char k)
{
    PCIFR = 0x07; //clear pin change flag2...0
    )
    {
        PCMSK0 = (<<k); //pin change mask 0
        DDRB &= ~(<<k);
    }
    )
    {
        k-=;
        PCMSK1 = (<<k); //pin change mask 1
        DDRC &= ~(<<k);
    }
    )
    {
        k-=;
        PCMSK2 = (<<k); //pin change mask 2
        DDRD &= ~(<<k);
    }
    TCNT0 = 0x00;
}
//4,7,8,12,14,17,19,20
unsigned ,KF[]={};//按键标记　１按下　０未按
//按键编号               1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
unsigned ]={,,,,,,,,,,,,,,,,,,,,};//门限值

#pragma interrupt_handler key_tst:iv_PCINT0
#pragma interrupt_handler key_tst:iv_PCINT1
#pragma interrupt_handler key_tst:iv_PCINT2
void key_tst(void)
{
    unsigned char i;
    if(TCNT0>D[KEYNUM]) KF[KEYNUM]=on;
    else KF[KEYNUM]=off;
    ;i<;i++)
    {
        ]=i; break;}
            ]=;
    }
    led(KF[]);
    ) KEYNUM = ;
}

//TIMER0 initialize - prescale:1
// WGM: Normal
// desired value: 0.125uSec
// actual value:  0.125uSec (0.0%)
void timer0_init(void)
{
    TCCR0B = 0x00; //stop
    TCNT0 = 0xFF; //set count
    TCCR0A = 0x00;
    TCCR0B = 0x02; //start timer
    TIMSK0 = 0x00; //timer 0 interrupt sources
}

//TIMER2 initialize - prescale:32
// WGM: Normal
// desired value: 1mSec
// actual value:  1.000mSec (0.0%)
void timer2_init(void)
{
    TCCR2B = 0x00; //stop
    ASSR  = 0x00; //set async mode
    TCNT2 = 0x00; //setup
    OCR2A = 0x83;
    TCCR2A = 0x00;
    TCCR2B = 0x02; //start
    TIMSK2 = 0x03; //timer 2 interrupt sources
}

#pragma interrupt_handler timer2_compa_isr:iv_TIM2_COMPA
void timer2_compa_isr(void)
{
    key_tst_start(K[KEYNUM]);
}

#pragma interrupt_handler timer2_ovf_isr:iv_TIM2_OVF
void timer2_ovf_isr(void)
{
    //TCNT2 = 0x06; //reload counter value
    key_tst_prep(K[KEYNUM]);
}

//TWI initialize
// bit rate:1
void twi_init(void)
{
    TWCR= 0X00; //disable twi
    TWBR= 0x01; //set bit rate
    TWSR= 0x01; //set prescale
    TWAR= 0x00; //set slave address
    TWCR= 0x44; //enable twi
}

//call this routine to initialize all peripherals
void init_devices(void)
{
    //stop errant interrupts until set up
    CLI(); //disable all interrupts
    key_tst_prep(K[KEYNUM]);
    timer0_init();
    timer2_init();
    //twi_init();

    MCUCR = 0x00;
    EICRA = 0x00; //extended ext ints
    EIMSK = 0x00;
    PRR = 0x0F; //power controller
    SEI(); //re-enable interrupts
    //all peripherals are now initialized
}

//
void main(void)
{
    init_devices();
}