[임베디드 C언어_Day6]LED + keypad(비트필드 구조체 사용)구현

■LED + keypad 회로도 (비트필드 구조체 사용)■

#include "2450addr.h"
typedef struct    
{
    unsigned gpg0 : 2;
    unsigned gpg1 : 2;
    unsigned gpg2 : 2;
    unsigned gpg3 : 2;
    unsigned gpg4 : 2;
    unsigned gpg5 : 2;
    unsigned gpg6 : 2;
    unsigned gpg7 : 2;
 
}gpgcon_t;
typedef struct 
{
    unsigned gpg0 : 1;
    unsigned gpg1 : 1;
    unsigned gpg2 : 1;
    unsigned gpg3 : 1;
    unsigned gpg4 : 1;
    unsigned gpg5 : 1;
    unsigned gpg6 : 1;
    unsigned gpg7 : 1;
}gpgdat_t;
 
typedef struct 
{
    unsigned gpf0 : 2;
    unsigned gpf1 : 2;
    unsigned gpf2 : 2;
    unsigned gpf3 : 2;
    unsigned gpf4 : 2;
    unsigned gpf5 : 2;
    unsigned gpf6 : 2;
    unsigned gpf7 : 2;
}gpfcon_t;
typedef struct 
{
    unsigned gpf0 : 1;
    unsigned gpf1 : 1;
    unsigned gpf2 : 1;
    unsigned gpf3 : 1;
    unsigned gpf4 : 1;
    unsigned gpf5 : 1;
    unsigned gpf6 : 1;
    unsigned gpf7 : 1;
}gpfdat_t;
 
#define GPGCON  (*(volatile gpgcon_t *)0x56000060)
#define GPGDAT  (*(volatile gpgdat_t *)0x56000064)
#define GPFCON  (*(volatile gpfcon_t *)0x56000050)
#define GPFDAT  (*(volatile gpfdat_t *)0x56000054)
void LED_Port_Init(void);
void LED_ON_Off(int num);
int Get_Key_byPolling(void);
 
void Main()
{
    int key;
    LED_Port_Init();
    while(1)
    {
 
    GPGDAT.gpg0 = 0x1;
    GPFDAT.gpf7 = 0x0;
    key = Get_Key_byPolling();    
    LED_ON_Off(key);
 
    GPGDAT.gpg0 =0x0;
    GPFDAT.gpf7 = 0x1;
    key = Get_Key_byPolling();    
    LED_ON_Off(key+1);
 
    }
}
 
void LED_Port_Init() 
{    
    GPGCON.gpg0 = 0x1;
    GPGCON.gpg4 = 0x1;
    GPGCON.gpg5 = 0x1;
    GPGCON.gpg6 = 0x1;
    GPGCON.gpg7 = 0x1;
 
    GPGDAT.gpg4 = 0x1;
    GPGDAT.gpg5 = 0x1;
    GPGDAT.gpg6 = 0x1;
    GPGDAT.gpg7 = 0x1;
    
    GPFCON.gpf2 = 0x0;
    GPFCON.gpf3 = 0x0;
    GPFCON.gpf4 = 0x0;
    GPFCON.gpf5 = 0x0;
    GPFCON.gpf6 = 0x0; 
    GPFCON.gpf7 = 0x1;
    
 
    GPFDAT.gpf0= 0x0;
    GPFDAT.gpf1= 0x0;
    GPFDAT.gpf2= 0x0;
    GPFDAT.gpf3= 0x0;
    GPFDAT.gpf4= 0x0;
    GPFDAT.gpf5= 0x0;
    GPFDAT.gpf6= 0x0;
    GPFDAT.gpf7= 0x0;
}
 
 
void LED_ON_Off(int num)
{
    switch(num)
    {
    case 0:
    GPGDAT.gpg4 = 0x1;
    GPGDAT.gpg5 = 0x1;
    GPGDAT.gpg6 = 0x1;
    GPGDAT.gpg7 = 0x1;
    break;
    case 1:
    GPGDAT.gpg4 = 0x0;
    GPGDAT.gpg5 = 0x1;
    GPGDAT.gpg6 = 0x1;
    GPGDAT.gpg7 = 0x1;
    break;
    case 2:
    GPGDAT.gpg4 = 0x1;
    GPGDAT.gpg5 = 0x0;
    GPGDAT.gpg6 = 0x1;
    GPGDAT.gpg7 = 0x1;
    break;
    case 3:
    GPGDAT.gpg4 = 0x1;
    GPGDAT.gpg5 = 0x1;
    GPGDAT.gpg6 = 0x0;
    GPGDAT.gpg7 = 0x1;
    break;
    case 4:
    GPGDAT.gpg4 = 0x1;
    GPGDAT.gpg5 = 0x1;
    GPGDAT.gpg6 = 0x1;
    GPGDAT.gpg7 = 0x0;
    break;
    case 5:
    GPGDAT.gpg4 = 0x1;
    GPGDAT.gpg5 = 0x1;
    GPGDAT.gpg6 = 0x0;
    GPGDAT.gpg7 = 0x0;
    break;
    case 6:
    GPGDAT.gpg4 = 0x0;
    GPGDAT.gpg5 = 0x0;
    GPGDAT.gpg6 = 0x1;
    GPGDAT.gpg7 = 0x1;
    break;
    }
}
 
int Get_Key_byPolling(void)
{        
    unsigned char key=(GPFDAT.gpf2)|(GPFDAT.gpf3<<1)|(GPFDAT.gpf4<<2)|(GPFDAT.gpf5<<3)|(GPFDAT.gpf6<<4);
    if(key==0x1e)     
        {return 1;}
    if(key==0x1d)
        {return 2;}
    if(key==0x1b)
        {return 3;}
    if(key==0x17)
        {return 4;}
    if(key==0xf)
        {return 5;}
}