w78exx.c

功能：arm7平台的I2c驱动程序

//DIP40 and PLCC44

#include <w78e365.h>
#include<ABSACC.H>

#define uchar unsigned char 
#define uint unsigned int 
#define uint32 unsigned long 

sbit P40   = P4^0;
sbit P41   = P4^1;
sbit P42   = P4^2;
sbit P43   = P4^3;

void main(void)
{
	uint i;	
	uchar j,k;
	j=0;
	k=0;
	
	k=0XAF;
	XBYTE[0X5555]=0XAA;
	k=XBYTE[0X0001];
	for(;;)
	{
		if(j==0)
		{
			P0=P1=P2=P3=P4=0x00;
			for(i=0;i<0xcfff;i++);
			j++;
		}
		else if(j==1)
		{
			P0=P1=P2=P3=P4=0xff;
			for(i=0;i<0x9fff;i++);
			j++;
		}
		else if(j==2)
		{
			P0=P1=P2=P3=P4=0x00;
			for(i=0;i<0xcfff;i++);
			j++;
		}
		else if(j==3)
		{
			P0=P1=P2=P3=P4=0xff;
			for(i=0;i<0x9fff;i++);
			j++;
		}
		else if(j==4)
		{
			P0=P1=P2=P3=P4=0xff;
			if(k<8)
				P0 = ~(0x01<<k);
			else if(k<16)
				P1 = ~(0x01<<(k%8));
			else if(k<24)
				P2 = ~(0x01<<(k%8));
			else if(k<32)
				P3 = ~(0x01<<(k%8));
			else if(k<36)
				P4 = ~(0x01<<(k%8));
			for(i=0;i<0x4fff;i++);
			k++;
			if(k>=36)
			{
				k=0;j=0;
				P43 = 1;
			}			
		}
		
	}
}