chushihua.c

实现了有凌阳的外部中断进行技数

#include "SPCE061A.h"
int chushihua(void)
{
    *P_IOA_Dir=0xFFFF;
    *P_IOA_Attrib=0xFFFF;
    *P_IOA_Data=0x0000;
    *P_SystemClock=0x0080;          //CPU frequance is 49.152m
    
   
   	*P_IOB_Dir=0x0000;
    *P_IOB_Attrib=0x0000;
    *P_IOB_Data=0x0004;
    
	*P_INT_Ctrl=0x1044;          //?timerA为2hz中断 显示为4khz中断
	*P_TimerA_Ctrl=0x0037;       //利用外部中断 XT1
	*P_TimerA_Data==0x0000;
	
	
	 return;
}