sysinit.c

msp430芯片驱动时钟芯片SD2201的驱动程序。程序用于量产产品中！

#include "extern.h"

static void OscInit(void)
{
  char i;
  BCSCTL1 &= ~XT2OFF;
  do
  {
    IFG1 &= ~OFIFG;
    for (i = 0xFF; i > 0; i--);
  }
  while ((IFG1 & OFIFG) != 0);
  BCSCTL2 |= SELM1+SELS;
}

static void PortInit(void)
{
  P1DIR=0x0E; P1OUT=0x0C; P1IES=0XF1;
  P2DIR=0x4C; P2OUT=0x4C; P2SEL=0X10; P2IES=0x02;//7026sig下降沿触发（重新写数据）
  P3SEL=0x30; P3DIR=0x1E; P3OUT=0x14;
  P4DIR=0xF8; P4OUT=0xF8;
}

void SysInit(void)
{
  char i;
  for(i=0;i<4;i++)Delay(0xffff);
  OscInit();
  PortInit();
  Sd2001Init();
}