关于msp430驱动LCD

用MSP430F427A 驱动LCD   选择分压电阻100k，用示波器看COM口和S0~S11 都能看到波形，但是液晶屏就是无显示   求指导
#include <msp430x42x.h>

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

//************* 延时定义***************************
#define CPU_F ((double)32768.0)
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
#define dealy_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))

//******************LCD码表************************
uchar const duanma[]={
  0x7d,    //0
  0x60,    //1
  0x3e,    //2
  0x7a,    //3
  0x63,    //4
  0x5b,    //5
  0x5f,    //6
  0x70,    //7
  0x7f,    //8
  0x7b     //9
};
uchar i,j;

void main()
{
  WDTCTL = WDTPW+WDTHOLD;
  BTCTL=BT_fLCD_1K+BT_fCLK2_ACLK;
//  clock_init();

  LCDCTL=LCDSG0_1+LCD4MUX+LCDON;

  uchar i;

  while(1)
  {
    for(i=0;i<5;i++)
    {
      LCDMEM[i]=duanma[i];
    }
  
  }
}