test44x_lcd02.c

430例程大全 端口操作 时钟模块FLL+操作 flash读写操作 看门狗操作 timerA-操作 timerB-操作 比较器A操作 基本定时器LED&LCD操作 ADC&BT&LC

#include "msp430x44x.h"

// variable declaration //
unsigned int value = 1789;  // number to display, range = 0 - 1999 = max display
                            // NOTE: DO NOT use leading zeros
unsigned int h;
unsigned int i;
unsigned int dig_pntr;  
char *LCD = LCDMEM;
       

// array declaration //
char digit[40] = {
0x11, 0x11,  // "0"    LCD segments a+b & c+d = lower two bytes
0x11, 0x00,  // "0"    LCD segments e+f & g+h = upper two bytes
0x10, 0x01,  // "1" 
0x00, 0x00,  // "1" 
0x11, 0x10,  // "2" 
0x01, 0x01,  // "2" 
0x11, 0x11,  // "3" 
0x00, 0x01,  // "3" 
0x10, 0x01,  // "4" 
0x10, 0x01,  // "4" 
0x01, 0x11,  // "5"  
0x10, 0x01,  // "5"  
0x01, 0x11,  // "6" 
0x11, 0x01,  // "6" 
0x11, 0x01,  // "7" 
0x00, 0x00,  // "7" 
0x11, 0x11,  // "8" 
0x11, 0x01,  // "8" 
0x11, 0x11,  // "9" 
0x10, 0x01,  // "9" 
};


void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;     // stop watchdog timer
  FLL_CTL0 = XCAP18PF;          // set load capacitance for 32k xtal 

  // initialize LCD driver (static mode) //
  LCDCTL = 0x65;                //static LCD, segments = 0 - 23
  BTCTL  = BTFRFQ1+BTFRFQ0;     // BTCTL ;set fLCD = ACLK / 256 BTFRFQ1
  
  // set up ports //
  P1DIR = 0xFF;                 // set port to outputs
  P2DIR = 0xFF;                 // set port to outputs
  P3DIR = 0xFF;                 // set port to outputs
  P4DIR = 0xFF;                 // set port to outputs
  P5DIR = 0xFF;                 // set port to outputs
  P6DIR = 0xFF;                 // set port to outputs  
    
    
  // clear LCD memory to clear display //
  for (i=0; i<20; i++)
  {
    LCD[i] = 0;
  } 

  // display lower 3 digits //
  for (h=0; h<3; h++)           // loops to move 3 digits to LCD
  {
    dig_pntr = 4*(value%10);    // set pointer to start of digit in table

    for (i=0; i<4; i++)         // loops to load 4 bytes of digit
    {
      LCD[i] = digit[dig_pntr++]; // byte of digit to byte of LCD memory 
    }                           // and increment to next byte of digit
  
    value /= 10;                // shifts value right to display next character
    LCD += 4;                   // increment by 4 for next character location
  }
  
  // test for leading 1 and display if present //
  if (value == 1)
  {
    LCDM12 |= 0x10;             // set bit = leading 1
  }
 
  LPM3;                         // enter low power mode 3 
}