#include "mbed.h"

DigitalIn   in( p20 );
DigitalOut  led1(LED1);
DigitalOut  led2(LED2);

int main() {
    
    in.mode( PullUp );    //  内蔵プルアップを使う
//    in.mode( PullDown );    /  内蔵プルダウンを使う
    
    while(1) {
        led1    = in;  //  入力ピンの状態を読み込む
        led2    = in;  //  入力ピンの状態を読み込む
        wait(0.2);
        led1    = 0;  //  入力ピンが1なら，これにより1と0を繰り返すのでLED1が点滅
        led2    = 1;  //  入力ピンが0なら，これにより0と1を繰り返すのでLED2が点滅
        wait(0.2);
    }
}

#include "mbed.h"

DigitalOut  leds[]  = {  //  配列を用意します
    DigitalOut( LED4 ),  //  配列の1番目の要素をLED4で初期化したDigitalOutに
    DigitalOut( LED3 ),  //  ..
    DigitalOut( LED2 ),  //  ..
    DigitalOut( LED1 )   //  ..
};

int main()
{
    int count   = 0;

    while(1) {
        for ( int i = 0; i < 4; i++ ) {
            leds[ i ]   = (count >> i) & 0x1;  //  変数 count の値をLED4〜LED1に表示(二進値)
        }
        wait( 0.2 );
        count++;
    }
}

#include "mbed.h"
#include "LM75B.h"  //  Library : http://developer.mbed.org/users/neilt6/code/LM75B/

#define N_OF_SENSORS    5  //  センサを5個使う

LM75B   sensor[ N_OF_SENSORS ]  = {  //  各センサのインスタンスを配列として用意
    LM75B( p28, p27, LM75B::ADDRESS_0 ),  //  配列の1番目の要素をはp28，p27に繋がれたアドレス= ADDRESS_0のデバイスに
    LM75B( p28, p27, LM75B::ADDRESS_1 ),  //  ..
    LM75B( p28, p27, LM75B::ADDRESS_2 ),  //  ..
    LM75B( p28, p27, LM75B::ADDRESS_3 ),  //  ..
    LM75B( p28, p27, LM75B::ADDRESS_4 )   //  ..
};

int main()
{
    while(1) {
        for ( int i = 0; i < N_OF_SENSORS; i++ ) {
            printf( "sensor%d = %.3fdeg-C\r\n", i, (float)sensor[ i ] );  //  ループが回るたびにそれぞれのセンサへのアクセスが行われる
        }
        wait( 1 );
    }
}

#include "mbed.h"

BusOut  leds( LED4, LED3, LED2, LED1 );  //  LED4〜LED1をまとめてインスタンスとする

int main() {
    int count   = 0;

    while(1) {
        leds    = count++;  //  変数 count の値をLEDに表示(そのまま代入できます)
        wait(0.2);
    }
}

//  GPIO port setting
 
#define     ADDR_MASK       0x07878000  //  8 bit address mask on PORT0: Address value will be set into this bit position
#define     DATA_MASK       0x00000FF0  //  8 bit data mask on PORT0: Data value will be appeared on this bit position
#define     CONTROL_MASK    0x00000038  //  Control signals CS=bit5(pin21), WR=bit4(pin22), RD=bit3(pin23)
 
PortOut     addr_port( Port0, ADDR_MASK );
PortInOut   data_port( Port0, DATA_MASK );
PortOut     ctrl_port( Port2, CONTROL_MASK );
 
//  Next two macros defines interface for temporaly interrupt disable/enable functions.
//  These macros are used to blocking interrupt until a bus access cycle completed.
//  Because if the interrupt happened in a cycle, the emulated parallel port state will be disturbed.
//  For the mbed, library routine: __disable_irq() / __enable_irq() can be used.
 
#define     interrupt_enable()    __enable_irq()
#define     interrupt_disable()   __disable_irq()
 
//  Hardware initialize: it defines initial state of the (emulated) parallel bus
 
void hardware_initialize( void ) {
    prev_access_was_write   = 0;
    ctrl_port               = 0x38;     //  CS, WR and RD are deaserted (HIGH)
    data_port.input();                  //  data bus set to Hi-Z
    reset_port.output();
    reset_port.mode( PullUp );
}
 
//  Single write cycle on (emulated) parallel bus
 
void write_data( char addr, char data ) {
    unsigned long   addr_data;
 
    interrupt_disable();    //  disable interrupt first
 
    addr_data   = (addr << 19) | (addr << 15) | (data << 4);
 
    LPC_GPIO0->FIOMASK  = ~(ADDR_MASK | DATA_MASK);
    LPC_GPIO0->FIODIR   = ADDR_MASK;
    LPC_GPIO0->FIOSET   = addr_data;
    LPC_GPIO0->FIOCLR   = ~addr_data;
 
    LPC_GPIO2->FIOCLR   = 0x20; //  Assert CS signal
 
    LPC_GPIO0->FIODIR   = ADDR_MASK | DATA_MASK;
 
    LPC_GPIO2->FIOCLR   = 0x30; //  repeating register write to keep pulse width wide :)
 
    LPC_GPIO0->FIOSET   = addr_data;
    LPC_GPIO0->FIOCLR   = ~addr_data;
 
    LPC_GPIO2->FIOCLR   = 0x30; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x30; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x30; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x30; //  to keep timing
    LPC_GPIO2->FIOSET   = 0x38;
 
    LPC_GPIO0->FIODIR   = ADDR_MASK;
 
    interrupt_enable();    //  enable interrupt again
}
 
char read_data( char addr ) {
    unsigned long   addr_data;
    volatile char   tmp;
 
    interrupt_disable();    //  disable interrupt first
 
    LPC_GPIO0->FIODIR   = ADDR_MASK;
 
    LPC_GPIO0->FIOMASK   = ~ADDR_MASK;
    addr_data   = (addr << 19) | (addr << 15);
    LPC_GPIO0->FIOSET   = addr_data;
    LPC_GPIO0->FIOCLR   = ~addr_data;
 
    LPC_GPIO2->FIOCLR   = 0x28; //  Assert CS and RD signals
    LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
    LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
 
    LPC_GPIO0->FIOMASK  = ~DATA_MASK;
    tmp                 = (LPC_GPIO0->FIOPIN >> 4) & 0xFF;      //  Read data bus into var
 
    LPC_GPIO2->FIOSET   = 0x38;
 
    interrupt_enable();    //  enable interrupt again
 
    return ( tmp );
}

*(volatile int *)0x400FC10C  = 0xFF;  //  アドレス0x400FC10Cに値を代入
printf( "data in 0x400FC10C is 0x%08X\n", *(volatile int *)0x400FC10C );  //  アドレス0x400FC10Cの値を表示