main.c

1. beep -- PWM测试 为 ADS1.2 下编译的项目, 在sdt2.51的ADW里调试

#include "option.h"
#include "def.h"
#include "44b.h"
#include "44blib.h"

volatile char which_int=0;

void __irq Key_Int(void)
{	

    which_int=rEXTINTPND;
    rEXTINTPND=0xf;		//clear EXTINTPND reg.		
    rI_ISPC=BIT_EINT4567;	//clear pending_bit
            switch(which_int)
            {
        	case 1:
        	    Uart_Printf("EINT4 had been occured...\n");
				Led_Display(1);
        	    which_int=0;
        	    break;
        	case 2:
        	    Uart_Printf("EINT5 had been occured...\n");
				Led_Display(2);
        	    which_int=0;
        	    break;
        	case 4:
        	    Uart_Printf("EINT6 had been occured...\n");
				Led_Display(4);
        	    which_int=0;
        	    break;
        	case 8:
        	    Uart_Printf("EINT7 had been occured...\n");
				Led_Display(0);
        	    which_int=0;
        	    break;
        	default :
        	    break;
            }
 
}
void Key_Init(void)
{
	rINTCON=0x5;
	rINTMOD=0x0;    //All=IRQ mode
//	rEXTINT=0x22222222; //Falling edge mode 
	rEXTINT=0x0;		//"0" level mode
    rPCONG=0xffff;	//EINT7~0
    rPUPG=0x0;		//pull up enable
    pISR_EINT4567=(unsigned)Key_Int;
    rINTMSK=~(BIT_GLOBAL|BIT_EINT4567);	//start INT
}

void Main(void)
{
    rSYSCFG=CACHECFG;   // Using 8KB Cache//

    Port_Init();
    Uart_Init(0,57600);
    Delay(10);
    Uart_Select(0); //Select UART0
    Led_Display(0x07);
    
    Uart_Printf("\nFS44B0X");
    Uart_Printf("\n按键中断演示程序");
    Uart_Printf("\n按FS44B0X开发板上的按键 key1 key2 key3 key4!");
    
    Key_Init();
    while(1);
    
}