MSP430F42X的段式液晶点亮问题

[dyf20081124]

初始化完后液晶还是点不亮。
初始化函数如下：
void init_LCD()
{
volatile unsigned int i; // Use volatile to prevent removal
// by compiler optimization

WDTCTL = WDTPW + WDTHOLD; // Stop WDT
FLL_CTL0 |= XCAP10PF; // Configure load caps
for (i = 0; i < 10000; i++); // Delay for 32 kHz crystal to
// stabilize
// Initialize LCD
LCDCTL = LCDP2+LCDSTATIC+LCDON; // Static LCD, segments S0-S27
BTCTL = BTFRFQ1+BTFRFQ0; // Set freqLCD = ACLK/256

P1DIR=0xFF;
P2DIR=0xFF;
}