hd.c

MSP430的I2C模块

#include "chip.h"
unsigned char oscflg;

void InitClock()
{
unsigned int oscdly;
 DCOCTL=DCO2+DCO1+DCO0;        //Definition the Highest frequency for DCO 
 BCSCTL1=RSEL2+RSEL1+RSEL0;//+XTS //X2T Disable; LFXT1 operation at high speed mode; Highest nominal DCO
 oscdly=500;
 while((IFG1 & OFIFG) && oscdly--);
 if(IFG1 & OFIFG) oscflg=1;
 else oscflg=0;
 BCSCTL2=SELM1+SELS;  //xt2 is used by both SMCLK and MCLK
}

void InitP1()
{
 P1SEL=0x0;//P1.6 input from I2C interrupt
 P1DIR=0X0;
 P1IES=0x10;
 P1IE=0x10;
}