请教lcd的屏抖动的问题

只看该作者 · 2012-7-13 11:11

初识430：我现在在用430那块板子作一个电池供电的LCD显示仪表，但是现在lcd仪表出现了屏幕抖动的情况，附件是我的程序，请大侠们有时间帮我看一下，是什么问题？应该怎么去修改？
//******************************************************************************
//******************************************************************************
#include  <msp430x42x0.h>
// LCD segment definitions.
#define d 0x80
#define e 0x40
#define g 0x20
#define f 0x10
#define h 0x08
#define c 0x04
#define a 0x01
#define b 0x02
const char char_gen[] = {                // definitions for digits
  a+b+c+d+e+f,                            // Displays "0"
  b+c,
  a+b+g+e+d,                                     // Displays "1"
  a+b+d+c+g,                               // Displays "2"
  b+c+f+g,                               // Displays "3"
  a+f+g+c+d+h,                               // Displays "4"
  a+f+e+d+c+g,                               // Displays "5"
  a+b+c,                            // Displays "6"
  a+b+c+d+e+f+g,                               // Displays "7"
  a+b+c+d+f+g                      // Displays "9"
};
unsigned int num=0;
volatile unsigned int i;                // Use volatile to prevent removal
unsigned int result; // by compiler optimization
unsigned int index;
unsigned char dis_buf[5];
unsigned char n;
void lcd()
{

dis_buf[0]=result/10000%10;
dis_buf[1]=result/1000%10;
dis_buf[2]=result/100%10;
dis_buf[3]=result/10%10;
dis_buf[4]=result%10;

for (n=0; n<5; ++n)                   // Display "0123456"
LCDMEM[n] = char_gen[dis_buf[n]];

}
//******************************************************************************
//******************************************************************************

void main(void)
{
WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  FLL_CTL0 |= XCAP18PF;                   // Set load cap for 32k xtal
for (i = 0; i < 10000; i++);             // Delay for 32 kHz crystal to

  LCDACTL = LCDON + LCD4MUX + LCDFREQ_128;  // 4mux LCD, ACLK/128
  LCDAPCTL0 = 0x0F;                      // Segments 0-13
  P5SEL  = 0x1C; // Set COM pins for LCD

for( n = 0; n <20 ; n ++)
  {
LCDMEM[n] = 0;                         // Clear LCD
}

index=0;
num=0;

  P1DIR |= 0x01;                         // Set P1.0 as output
  BTCTL = BTDIV + BT_fCLK2_DIV16;          // ACLK/(256*16)
  IE2 |= BTIE;                            // Enable BT interrupt
  while(1)
  {
SD16CTL = SD16REFON+SD16SSEL1;          // 1.2V ref, SMCLK
SD16CCTL0 |= SD16SNGL;                   // Single conv
for (i = 0; i < 0x3600; i++);          // Delay for 1.2V ref startup
SD16CCTL0 |= SD16SC;                   // Set bit to start conversion
while ((SD16CCTL0 & SD16IFG)==0);    // Poll interrupt flag
      result = SD16MEM0;
if (++index == 10)
{

index = 0;                         // SET BREAKPOINT HERE
}
_NOP();
SD16CTL=0x00;
IE2=0x80;
_BIS_SR(LPM3_bits + GIE);                // Enter LPM3, enable interrupts
  }
}
// Basic Timer Interrupt Service Routine
#pragma vector=BASICTIMER_VECTOR
__interrupt void basic_timer_ISR(void)
{
  P1OUT ^= 0x01;                            // Toggle P1.0
  num=num+1;
  if(num>10)
  {
num=0;
lcd();
for (i = 0; i < 0x9000; i++);          // Delay
  _BIC_SR_IRQ(LPM3_bits);
  IE2=0x00;
  }
}