fet440_lcd_01.c

MSP430F43x, MSP430F44x.zip c语言 例程

//*****************************************************************************
//  MSP-FET430P440 Demo - LCD, Display "6543210" on STK/EVK LCD
//
//  Description: Displays "6543210" on MSP-EVK430S320 LCD.
//  ACLK = LFXT1 = 32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
//  //* An external watch crystal between XIN & XOUT is required for ACLK *//	
//
//                                Connections MSP430 -> LCD
//                                -------------------------
//
//                                             T.I. MSP-EVK430S320
//                            MSP430F449       6.5 digit 4 mux LCD
//                                                   #T218010
//                      /|\ ---------------       --------------
//                       | |          COM3 |-----|2    COM4     |
//                       --|RST       COM2 |-----|1    COM3     |
//                         |          COM1 |-----|3    COM2     |
//                         |          COM0 |-----|4,20 COM1     |
//                        -|XIN       SEG0 |-----|19            |
//                    32kHz|          SEG1 |-----|18            |
//                        -|XOUT      SEG2 |-----|17            |
//                         |          SEG3 |-----|16            |
//                         |          SEG4 |-----|15            |
//                         |          SEG5 |-----|14            |
//                         |          SEG6 |-----|13            |
//                         |          SEG7 |-----|12            |
//                       +-|R33       SEG8 |-----|11            |
//                      1M |          SEG9 |-----|10            |
//                       +-|R23       SEG10|-----|9             |
//                      1M |          SEG11|-----|8             |
//                       +-|R13       SEG12|-----|7             |
//                      1M |          SEG13|-----|6             |
//                       +-|R03       SEG14|-----|5 (bits C,E,H |
//                       | |               |     |   of digit 7)|
//                      Vss ---------------       --------------
//
//  M. Buccini / H. Grewal
//  Texas Instruments Inc.
//  Feb 2005
//  Built with IAR Embedded Workbench Version: 3.21A
//*****************************************************************************
#include  <msp430x44x.h>

const char digit[10] =
{
  0xB7,  /* "0" LCD segments a+b+c+d+e+f */
  0x12,  /* "1" */
  0x8F,  /* "2" */
  0x1F,  /* "3" */
  0x3A,  /* "4" */
  0x3D,  /* "5" */
  0xBD,  /* "6" */
  0x13,  /* "7" */
  0xBF,  /* "8" */
  0x3F   /* "9" */
};

void main(void)
{
  volatile unsigned int i;                  // Use volatile to prevent removal
                                            // by compiler optimization

  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  FLL_CTL0 |= XCAP14PF;                     // Configure load caps
  for (i = 0; i < 10000; i++);              // Delay for 32 kHz crystal to
                                            // stabilize

  LCDCTL = LCDON + LCD4MUX + LCDSG0_4;      // LCD on, 4-Mux, segments S0-S27
  BTCTL = BT_fLCD_DIV128;                   // LCD clock freq is ACLK/128
  P5SEL = 0xFC;                             // Select P5.2-7 as Com and Rxx

  for (;;)
  {
    unsigned char x;

    for (x=0; x<7; x++)
    {
      LCDMEM[x] = digit[x];                 // Display "6543210"
    }
  }
}