main.c

PXA270平台的键盘应用程序代码~~~~实现4*4键盘全功能

//#include <stdio.h>

//LED
#define LED_CS3		(*((volatile unsigned short int *)(0x10300000)))
#define LED_CS4		(*((volatile unsigned short int *)(0x10400000)))

//键盘设置寄存器
#define KEYPAD_1      (*((volatile unsigned int *)(0x41500000)))
#define KEYPAD_2      (*((volatile unsigned int *)(0x41500048)))


//键盘允许中断设置
#define INTERRUPTION  (*((volatile unsigned int *)(0x40d00004)))


//只读寄存器
#define KEYPAD_8	(*((volatile unsigned char *)(0x41500008)))
#define KEYPAD0_11		(*((volatile unsigned char *)(0x41500020)))

void IRQ_keypad(void)
{
    char k;
    char ch;
    k=KEYPAD_8;
    ch=KEYPAD0_11;
    switch(k)
	{
	   case 0x40:
		   LED_CS3=0xf040;
		   break;
       case 0x02:
		   LED_CS3=0xf079;
		   break;
	   case 0x04:
		   LED_CS3=0xf024;
		   break;
	   case 0x20:
		   LED_CS3=0xf030;
		   break;
	   default: 
		   break;        
     }
   switch(ch)
   {
       case 0x00:
            LED_CS3=0xf019;
            break;
       case 0x01:
            LED_CS3=0xf012;
            break;
       case 0x02:
            LED_CS3=0xf003;
            break;
       case 0x05:
            LED_CS3=0xf078;
            break;
            
       case 0x10:
            LED_CS3=0xf000;
            break;
       case 0x11:
            LED_CS3=0xf018;
            break;
       case 0x12:
            LED_CS3=0xf008;
            break;
       case 0x15:
            LED_CS3=0xf000;
            break;
            
       case 0x20:
            LED_CS3=0xf046;
            break;
       case 0x21:
            LED_CS3=0xf040;
            break;
       case 0x22:
            LED_CS3=0xf006;
            break;
       case 0x25:
            LED_CS3=0xf00e;
            break;    
            
        
       default: 
		   break; 
   }
}
int main(void)
{	

   KEYPAD_1=0x7ffffff3;     //中断直接键盘0x600003f3;//0x2faff1c2;//
   KEYPAD_2=0x00000303;
   INTERRUPTION=0x00000010;
  
   LED_CS3=0x007f;
   LED_CS4=0xf0f0;
   
	 while (1)
	 {	
		
		
           
     }	
}