#include <REG938.h>
#include <intrins.h>

#define uint unsigned int
#define uchar unsigned char
#define _Nop()  _nop_()

void main()
{
 P0M1=0x00;
 P0M2=0x00;
 P1M1=0x0C;//P1.2，P1.3配置為開漏其他為雙向I/O
 P1M2=0x0C;
 P3M1=0x00;
 P3M2=0x00;

 P0=0xff;
 P1=0xff;
 P3=0xff;

 SP=0x7F;
I2CON=0x40;?/主發送器初始化
I2ADR=0x70;//從機地址70h
I2SCLH=0x0E;//數據波特率123Kbit/s
I2SCLL=0x0E;